./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur --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 a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:26:57,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:26:57,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:26:57,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:26:57,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:26:57,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:26:57,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:26:57,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:26:57,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:26:57,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:26:57,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:26:57,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:26:57,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:26:57,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:26:57,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:26:57,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:26:57,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:26:57,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:26:57,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:26:57,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:26:57,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:26:57,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:26:57,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:26:57,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:26:57,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:26:57,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:26:57,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:26:57,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:26:57,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:26:57,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:26:57,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:26:57,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:26:57,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:26:57,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:26:57,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:26:57,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:26:57,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:26:57,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:26:57,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:26:57,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:26:57,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:26:57,173 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:26:57,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:26:57,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:26:57,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:26:57,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:26:57,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:26:57,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:26:57,207 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:26:57,207 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:26:57,208 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:26:57,208 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:26:57,209 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:26:57,209 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:26:57,210 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:26:57,210 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:26:57,210 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:26:57,210 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:26:57,211 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:26:57,211 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:26:57,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:26:57,212 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:26:57,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:26:57,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:26:57,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:26:57,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:26:57,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:26:57,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:26:57,214 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:26:57,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:26:57,214 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:26:57,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:26:57,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:26:57,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:26:57,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:26:57,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:26:57,216 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:26:57,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:26:57,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:26:57,217 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:26:57,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:26:57,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:26:57,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:26:57,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 [2022-11-25 22:26:57,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:26:57,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:26:57,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:26:57,525 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:26:57,526 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:26:57,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2022-11-25 22:27:00,626 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:27:00,803 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:27:00,804 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2022-11-25 22:27:00,810 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/data/5699da81d/0e0f7c880c014d79a70219e2ea40dd1c/FLAG929932045 [2022-11-25 22:27:00,828 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/data/5699da81d/0e0f7c880c014d79a70219e2ea40dd1c [2022-11-25 22:27:00,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:27:00,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:27:00,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:27:00,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:27:00,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:27:00,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:27:00" (1/1) ... [2022-11-25 22:27:00,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485f1bac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:00, skipping insertion in model container [2022-11-25 22:27:00,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:27:00" (1/1) ... [2022-11-25 22:27:00,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:27:00,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:27:01,007 WARN L237 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_692710e4-c8ed-4eb7-b378-388d597935f5/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2022-11-25 22:27:01,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:27:01,038 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:27:01,051 WARN L237 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_692710e4-c8ed-4eb7-b378-388d597935f5/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2022-11-25 22:27:01,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:27:01,072 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:27:01,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01 WrapperNode [2022-11-25 22:27:01,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:27:01,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:27:01,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:27:01,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:27:01,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,119 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-11-25 22:27:01,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:27:01,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:27:01,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:27:01,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:27:01,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,145 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:27:01,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:27:01,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:27:01,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:27:01,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (1/1) ... [2022-11-25 22:27:01,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:27:01,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:01,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:27:01,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:27:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:27:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:27:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:27:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:27:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:27:01,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:27:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:27:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:27:01,302 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:27:01,305 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:27:01,448 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:27:01,509 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:27:01,509 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 22:27:01,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:27:01 BoogieIcfgContainer [2022-11-25 22:27:01,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:27:01,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:27:01,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:27:01,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:27:01,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:27:00" (1/3) ... [2022-11-25 22:27:01,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba83941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:27:01, skipping insertion in model container [2022-11-25 22:27:01,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:01" (2/3) ... [2022-11-25 22:27:01,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba83941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:27:01, skipping insertion in model container [2022-11-25 22:27:01,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:27:01" (3/3) ... [2022-11-25 22:27:01,521 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2022-11-25 22:27:01,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:27:01,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:27:01,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:27:01,598 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6dbc8107, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:27:01,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:27:01,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:27:01,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:01,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 22:27:01,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash 83296886, now seen corresponding path program 1 times [2022-11-25 22:27:01,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:01,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718609283] [2022-11-25 22:27:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:01,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:01,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718609283] [2022-11-25 22:27:01,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718609283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:01,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:01,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:27:01,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368152986] [2022-11-25 22:27:01,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:01,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:01,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:02,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:02,013 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:02,074 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-11-25 22:27:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:02,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 22:27:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:02,096 INFO L225 Difference]: With dead ends: 15 [2022-11-25 22:27:02,096 INFO L226 Difference]: Without dead ends: 8 [2022-11-25 22:27:02,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:02,111 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:02,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:27:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-25 22:27:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-25 22:27:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-25 22:27:02,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-25 22:27:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:02,177 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-25 22:27:02,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-25 22:27:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 22:27:02,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:02,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 22:27:02,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:27:02,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1709852021, now seen corresponding path program 1 times [2022-11-25 22:27:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:02,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281519275] [2022-11-25 22:27:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:02,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:02,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:27:02,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61312303] [2022-11-25 22:27:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:02,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:02,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:02,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:02,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:27:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:02,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:27:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:02,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:02,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:02,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281519275] [2022-11-25 22:27:02,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:27:02,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61312303] [2022-11-25 22:27:02,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61312303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:02,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934698241] [2022-11-25 22:27:02,536 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 22:27:02,536 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:02,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:02,544 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:02,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:02,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:02,694 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:27:02,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:27:02,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:02,778 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:02,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:02,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:02,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-25 22:27:02,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:02,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:02,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-11-25 22:27:02,941 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-25 22:27:03,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:27:03,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:27:03,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:03,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1934698241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:03,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:27:03,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2022-11-25 22:27:03,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115056162] [2022-11-25 22:27:03,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:03,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:27:03,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:27:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:27:03,383 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:03,437 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-25 22:27:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:27:03,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 22:27:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:03,439 INFO L225 Difference]: With dead ends: 13 [2022-11-25 22:27:03,440 INFO L226 Difference]: Without dead ends: 11 [2022-11-25 22:27:03,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:27:03,446 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:03,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:27:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-25 22:27:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-11-25 22:27:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-25 22:27:03,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-25 22:27:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:03,455 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-25 22:27:03,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-25 22:27:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 22:27:03,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:03,457 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:03,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:03,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:03,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash 115757833, now seen corresponding path program 1 times [2022-11-25 22:27:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:03,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843937119] [2022-11-25 22:27:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:03,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:27:03,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491656425] [2022-11-25 22:27:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:03,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:03,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:03,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:03,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:27:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:27:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:27:03,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:27:03,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843937119] [2022-11-25 22:27:03,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:27:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491656425] [2022-11-25 22:27:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491656425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:03,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749760495] [2022-11-25 22:27:03,862 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:27:03,862 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:03,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:03,863 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:03,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:03,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:03,914 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:27:03,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:27:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:03,964 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:03,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:04,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:04,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:04,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-25 22:27:04,051 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:04,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:04,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:04,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:04,247 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-25 22:27:04,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 523 treesize of output 583 [2022-11-25 22:27:04,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:04,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 316 treesize of output 306 [2022-11-25 22:27:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:04,706 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:27:04,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 679 treesize of output 670 [2022-11-25 22:27:04,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:04,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 648 treesize of output 649 [2022-11-25 22:27:05,137 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:11,407 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:11,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(and (<= 0 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2022-11-25 22:27:11,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:11,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:27:11,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-25 22:27:11,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692207658] [2022-11-25 22:27:11,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:11,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:27:11,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:11,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:27:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:27:11,521 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:11,551 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-25 22:27:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:27:11,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 22:27:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:11,552 INFO L225 Difference]: With dead ends: 20 [2022-11-25 22:27:11,552 INFO L226 Difference]: Without dead ends: 13 [2022-11-25 22:27:11,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:27:11,554 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:11,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:27:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-25 22:27:11,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-25 22:27:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-25 22:27:11,559 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-11-25 22:27:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:11,559 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-25 22:27:11,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:11,560 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-25 22:27:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 22:27:11,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:11,561 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:11,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:11,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:11,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:11,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:11,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1538090498, now seen corresponding path program 2 times [2022-11-25 22:27:11,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:11,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631285381] [2022-11-25 22:27:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:11,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:27:11,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084701935] [2022-11-25 22:27:11,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:27:11,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:11,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:11,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:11,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:27:11,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:27:11,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:27:11,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 22:27:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:12,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:12,057 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 45 [2022-11-25 22:27:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:27:12,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:12,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:12,482 INFO L350 Elim1Store]: Elim1 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 102 treesize of output 90 [2022-11-25 22:27:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:27:12,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631285381] [2022-11-25 22:27:12,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:27:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084701935] [2022-11-25 22:27:12,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084701935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197699990] [2022-11-25 22:27:12,821 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:27:12,821 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:12,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:12,822 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:12,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:12,866 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:27:12,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:27:12,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:12,914 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:12,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:12,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:12,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:12,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-25 22:27:12,957 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:13,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:13,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:13,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:13,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:13,147 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-25 22:27:13,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 538 treesize of output 598 [2022-11-25 22:27:13,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:13,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 319 [2022-11-25 22:27:13,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:13,451 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:27:13,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 721 treesize of output 712 [2022-11-25 22:27:13,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:13,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 690 treesize of output 691 [2022-11-25 22:27:13,868 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:19,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:19,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '297#(and (<= 0 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2022-11-25 22:27:19,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:19,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:27:19,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 22:27:19,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162054240] [2022-11-25 22:27:19,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:27:19,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:27:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:27:19,925 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:20,119 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-25 22:27:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:27:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 22:27:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:20,120 INFO L225 Difference]: With dead ends: 26 [2022-11-25 22:27:20,121 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 22:27:20,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-25 22:27:20,122 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:20,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 7 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:27:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 22:27:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-25 22:27:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-25 22:27:20,129 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2022-11-25 22:27:20,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:20,129 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-25 22:27:20,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-25 22:27:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 22:27:20,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:20,131 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1] [2022-11-25 22:27:20,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 22:27:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:20,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1434217034, now seen corresponding path program 3 times [2022-11-25 22:27:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:20,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112324255] [2022-11-25 22:27:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:20,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:27:20,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199007346] [2022-11-25 22:27:20,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:27:20,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:20,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:20,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:20,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:27:20,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:27:20,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:27:20,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:27:20,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:27:20,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:27:20,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:20,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112324255] [2022-11-25 22:27:20,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:27:20,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199007346] [2022-11-25 22:27:20,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199007346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:20,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467757306] [2022-11-25 22:27:20,600 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:27:20,602 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:20,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:20,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:20,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:20,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,654 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:20,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:20,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,668 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:27:20,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-25 22:27:20,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,726 INFO L350 Elim1Store]: Elim1 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 83 treesize of output 72 [2022-11-25 22:27:20,736 INFO L350 Elim1Store]: Elim1 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 40 [2022-11-25 22:27:20,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:27:20,786 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:20,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:27:20,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:27:20,911 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:21,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '506#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~R~0#1| 1) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:27:21,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:21,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:27:21,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-25 22:27:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942702598] [2022-11-25 22:27:21,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:21,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 22:27:21,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 22:27:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:27:21,217 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:21,278 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-11-25 22:27:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:27:21,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 22:27:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:21,280 INFO L225 Difference]: With dead ends: 44 [2022-11-25 22:27:21,280 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 22:27:21,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:27:21,281 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:21,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:27:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 22:27:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-25 22:27:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-11-25 22:27:21,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2022-11-25 22:27:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:21,289 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-11-25 22:27:21,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-11-25 22:27:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 22:27:21,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:21,290 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 4, 1, 1, 1, 1] [2022-11-25 22:27:21,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:21,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:21,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1116445290, now seen corresponding path program 4 times [2022-11-25 22:27:21,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:21,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720809209] [2022-11-25 22:27:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:21,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:21,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:27:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190457109] [2022-11-25 22:27:21,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:27:21,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:21,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:21,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:21,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:27:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:21,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 22:27:21,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:27:21,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:27:22,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720809209] [2022-11-25 22:27:22,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:27:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190457109] [2022-11-25 22:27:22,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190457109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:22,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704938463] [2022-11-25 22:27:22,063 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:27:22,063 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:22,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:22,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:22,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:22,115 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:27:22,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:27:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:22,156 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:22,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:22,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:22,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-25 22:27:22,195 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:22,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:22,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:22,320 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-25 22:27:22,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 557 treesize of output 609 [2022-11-25 22:27:22,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:22,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:22,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 372 treesize of output 365 [2022-11-25 22:27:22,498 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:22,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:27:22,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:27:23,013 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:23,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '800#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~R~0#1|) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~R~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 22:27:23,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:23,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:27:23,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-25 22:27:23,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587724900] [2022-11-25 22:27:23,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:23,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 22:27:23,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 22:27:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:27:23,480 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:23,553 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-11-25 22:27:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 22:27:23,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-25 22:27:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:23,555 INFO L225 Difference]: With dead ends: 56 [2022-11-25 22:27:23,555 INFO L226 Difference]: Without dead ends: 40 [2022-11-25 22:27:23,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:27:23,557 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:23,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:27:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-25 22:27:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-25 22:27:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-25 22:27:23,567 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 27 [2022-11-25 22:27:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:23,567 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-25 22:27:23,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-25 22:27:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:27:23,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:23,569 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 4, 4, 1, 1, 1, 1] [2022-11-25 22:27:23,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:23,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:23,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:23,776 INFO L85 PathProgramCache]: Analyzing trace with hash 530173270, now seen corresponding path program 5 times [2022-11-25 22:27:23,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:23,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304127098] [2022-11-25 22:27:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:23,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:23,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:27:23,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285087408] [2022-11-25 22:27:23,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:27:23,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:23,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:23,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:27:24,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:27:24,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:27:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 22:27:24,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:24,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:24,643 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 45 [2022-11-25 22:27:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 22:27:24,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:26,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:26,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 218 treesize of output 342 [2022-11-25 22:27:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 22:27:29,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304127098] [2022-11-25 22:27:29,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:27:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285087408] [2022-11-25 22:27:29,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285087408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1674004724] [2022-11-25 22:27:29,219 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:27:29,219 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:29,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:29,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:29,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:29,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:29,254 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:27:29,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:27:29,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:29,292 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:29,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:29,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:29,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-25 22:27:29,339 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:29,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:29,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:29,477 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-25 22:27:29,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 516 treesize of output 576 [2022-11-25 22:27:29,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:29,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 309 [2022-11-25 22:27:29,701 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:29,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:29,757 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:27:29,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 334 [2022-11-25 22:27:29,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:29,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 311 [2022-11-25 22:27:30,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:27:30,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:27:30,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:30,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1206#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~R~0#1|) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~R~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 22:27:30,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:30,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:27:30,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-25 22:27:30,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722176795] [2022-11-25 22:27:30,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:30,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 22:27:30,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 22:27:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:27:30,810 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:31,911 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-25 22:27:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 22:27:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-25 22:27:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:31,913 INFO L225 Difference]: With dead ends: 62 [2022-11-25 22:27:31,913 INFO L226 Difference]: Without dead ends: 60 [2022-11-25 22:27:31,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:27:31,914 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:31,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:27:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-25 22:27:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-11-25 22:27:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-11-25 22:27:31,926 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 39 [2022-11-25 22:27:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:31,927 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-11-25 22:27:31,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-11-25 22:27:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 22:27:31,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:31,928 INFO L195 NwaCegarLoop]: trace histogram [22, 11, 10, 10, 1, 1, 1, 1] [2022-11-25 22:27:31,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 22:27:32,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:32,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:32,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1399302570, now seen corresponding path program 6 times [2022-11-25 22:27:32,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:32,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172708868] [2022-11-25 22:27:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:32,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:32,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:27:32,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517992420] [2022-11-25 22:27:32,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:27:32,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:32,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:32,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:32,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:27:32,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:27:32,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:27:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:27:32,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-25 22:27:32,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-25 22:27:33,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:33,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172708868] [2022-11-25 22:27:33,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:27:33,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517992420] [2022-11-25 22:27:33,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517992420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:33,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1480919826] [2022-11-25 22:27:33,607 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:27:33,607 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:33,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:33,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:33,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:33,645 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:33,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:33,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:33,656 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:27:33,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:33,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:33,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-25 22:27:33,710 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:33,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:33,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:33,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:33,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:33,861 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-25 22:27:33,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 508 treesize of output 568 [2022-11-25 22:27:33,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:33,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 293 [2022-11-25 22:27:35,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:35,353 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:35,568 INFO L321 Elim1Store]: treesize reduction 82, result has 5.7 percent of original size [2022-11-25 22:27:35,568 INFO L350 Elim1Store]: Elim1 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 772 treesize of output 797 [2022-11-25 22:27:35,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:35,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 756 treesize of output 753 [2022-11-25 22:27:36,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:27:36,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:27:36,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:36,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1800#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~R~0#1|) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~R~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 22:27:36,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:36,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:27:36,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-25 22:27:36,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214547603] [2022-11-25 22:27:36,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:36,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 22:27:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 22:27:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1144, Invalid=1612, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 22:27:36,979 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:37,164 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-11-25 22:27:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 22:27:37,164 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-25 22:27:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:37,170 INFO L225 Difference]: With dead ends: 116 [2022-11-25 22:27:37,170 INFO L226 Difference]: Without dead ends: 82 [2022-11-25 22:27:37,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1144, Invalid=1612, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 22:27:37,174 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:37,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:27:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-25 22:27:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-25 22:27:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-11-25 22:27:37,215 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 57 [2022-11-25 22:27:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:37,217 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-11-25 22:27:37,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-11-25 22:27:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 22:27:37,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:37,227 INFO L195 NwaCegarLoop]: trace histogram [46, 11, 10, 10, 1, 1, 1, 1] [2022-11-25 22:27:37,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:37,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 22:27:37,445 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash -5413418, now seen corresponding path program 7 times [2022-11-25 22:27:37,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:37,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3793183] [2022-11-25 22:27:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:37,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:37,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:27:37,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633272265] [2022-11-25 22:27:37,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:27:37,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:37,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:37,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:37,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:27:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 22:27:37,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-25 22:27:39,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-25 22:27:42,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:42,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3793183] [2022-11-25 22:27:42,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:27:42,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633272265] [2022-11-25 22:27:42,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633272265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:42,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545873386] [2022-11-25 22:27:42,691 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:27:42,691 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:42,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:42,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:42,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:42,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:42,725 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:27:42,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:27:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:42,761 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:42,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:42,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-25 22:27:42,820 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:42,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:42,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:42,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:42,947 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-25 22:27:42,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 527 treesize of output 587 [2022-11-25 22:27:42,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:27:42,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 314 [2022-11-25 22:27:43,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:43,162 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:27:43,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 577 treesize of output 568 [2022-11-25 22:27:43,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:43,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 546 treesize of output 547 [2022-11-25 22:27:43,363 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:27:45,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:27:45,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:27:46,088 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:46,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2706#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~R~0#1|) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~R~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 22:27:46,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:46,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:27:46,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2022-11-25 22:27:46,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666128777] [2022-11-25 22:27:46,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:46,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-25 22:27:46,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:46,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-25 22:27:46,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4576, Invalid=5524, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 22:27:46,655 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:46,993 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2022-11-25 22:27:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-25 22:27:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-25 22:27:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:46,996 INFO L225 Difference]: With dead ends: 164 [2022-11-25 22:27:46,996 INFO L226 Difference]: Without dead ends: 130 [2022-11-25 22:27:46,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4576, Invalid=5524, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 22:27:47,002 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:47,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:27:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-25 22:27:47,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-25 22:27:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-11-25 22:27:47,069 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 81 [2022-11-25 22:27:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:47,069 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-11-25 22:27:47,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-11-25 22:27:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 22:27:47,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:47,072 INFO L195 NwaCegarLoop]: trace histogram [94, 11, 10, 10, 1, 1, 1, 1] [2022-11-25 22:27:47,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:47,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 22:27:47,280 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:47,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:47,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1515455702, now seen corresponding path program 8 times [2022-11-25 22:27:47,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:47,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451605780] [2022-11-25 22:27:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:47,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:47,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:27:47,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798743390] [2022-11-25 22:27:47,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:27:47,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:47,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:47,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:47,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:27:55,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-25 22:27:55,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:27:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:27:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:56,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:27:56,924 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 45 [2022-11-25 22:27:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-25 22:27:56,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:03,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:28:03,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 336 treesize of output 600 [2022-11-25 22:28:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-25 22:28:17,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:17,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451605780] [2022-11-25 22:28:17,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:17,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798743390] [2022-11-25 22:28:17,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798743390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53013230] [2022-11-25 22:28:17,638 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:28:17,639 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:17,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:17,639 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:17,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:17,679 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:28:17,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:28:17,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:17,698 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:28:17,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:17,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-25 22:28:17,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:17,735 INFO L350 Elim1Store]: Elim1 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 87 treesize of output 76 [2022-11-25 22:28:17,743 INFO L350 Elim1Store]: Elim1 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 40 [2022-11-25 22:28:17,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:28:17,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:28:17,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:18,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4024#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~R~0#1|) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~R~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 22:28:18,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:18,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:28:18,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-11-25 22:28:18,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978025901] [2022-11-25 22:28:18,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:18,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 22:28:18,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:18,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 22:28:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 22:28:18,509 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:21,813 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2022-11-25 22:28:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 22:28:21,813 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-25 22:28:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:21,815 INFO L225 Difference]: With dead ends: 170 [2022-11-25 22:28:21,815 INFO L226 Difference]: Without dead ends: 168 [2022-11-25 22:28:21,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=837, Invalid=1919, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 22:28:21,816 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:21,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 26 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:28:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-25 22:28:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2022-11-25 22:28:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-11-25 22:28:21,843 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 129 [2022-11-25 22:28:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:21,844 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-11-25 22:28:21,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-11-25 22:28:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-25 22:28:21,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:21,846 INFO L195 NwaCegarLoop]: trace histogram [94, 23, 22, 22, 1, 1, 1, 1] [2022-11-25 22:28:21,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:28:22,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash 746264278, now seen corresponding path program 9 times [2022-11-25 22:28:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:22,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586669691] [2022-11-25 22:28:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:22,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:22,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429981675] [2022-11-25 22:28:22,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:28:22,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:22,122 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:22,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:28:22,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:28:22,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:22,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 22:28:22,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-11-25 22:28:27,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-11-25 22:28:40,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586669691] [2022-11-25 22:28:40,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:28:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429981675] [2022-11-25 22:28:40,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429981675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984635608] [2022-11-25 22:28:40,161 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:28:40,162 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:40,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:40,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:40,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:40,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:40,196 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:28:40,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:28:40,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:40,231 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:28:40,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:28:40,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:40,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:40,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-25 22:28:40,291 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:28:40,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:40,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:40,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:40,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:40,403 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-25 22:28:40,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 512 treesize of output 572 [2022-11-25 22:28:40,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:40,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 301 [2022-11-25 22:28:41,035 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-25 22:28:41,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 542 treesize of output 519 [2022-11-25 22:28:41,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:41,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:41,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:28:41,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 432 treesize of output 430 [2022-11-25 22:28:41,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:28:41,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 440 treesize of output 439 [2022-11-25 22:28:41,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:41,113 INFO L350 Elim1Store]: Elim1 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 415 treesize of output 406 [2022-11-25 22:28:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:41,126 INFO L350 Elim1Store]: Elim1 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 406 treesize of output 397 [2022-11-25 22:28:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:41,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:41,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:28:41,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 397 treesize of output 397 [2022-11-25 22:28:41,319 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:28:41,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:28:41,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:28:41,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:42,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5818#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~R~0#1| 1) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:42,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:42,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:28:42,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2022-11-25 22:28:42,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471910262] [2022-11-25 22:28:42,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:42,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-11-25 22:28:42,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:42,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-11-25 22:28:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18348, Invalid=20264, Unknown=0, NotChecked=0, Total=38612 [2022-11-25 22:28:42,175 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:42,829 INFO L93 Difference]: Finished difference Result 332 states and 429 transitions. [2022-11-25 22:28:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-25 22:28:42,830 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-11-25 22:28:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:42,831 INFO L225 Difference]: With dead ends: 332 [2022-11-25 22:28:42,831 INFO L226 Difference]: Without dead ends: 262 [2022-11-25 22:28:42,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=18348, Invalid=20264, Unknown=0, NotChecked=0, Total=38612 [2022-11-25 22:28:42,836 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:42,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:28:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-25 22:28:42,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-11-25 22:28:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0076628352490422) internal successors, (263), 261 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2022-11-25 22:28:42,872 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 165 [2022-11-25 22:28:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:42,872 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2022-11-25 22:28:42,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2022-11-25 22:28:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-11-25 22:28:42,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:42,877 INFO L195 NwaCegarLoop]: trace histogram [190, 23, 22, 22, 1, 1, 1, 1] [2022-11-25 22:28:42,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:43,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:43,091 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash -411872042, now seen corresponding path program 10 times [2022-11-25 22:28:43,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:43,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903047642] [2022-11-25 22:28:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:43,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:43,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:28:43,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641641981] [2022-11-25 22:28:43,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:28:43,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:43,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:43,243 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:43,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:28:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:44,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-25 22:28:44,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18882 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-11-25 22:29:02,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18882 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-11-25 22:29:54,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:54,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903047642] [2022-11-25 22:29:54,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:29:54,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641641981] [2022-11-25 22:29:54,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641641981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:54,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132283389] [2022-11-25 22:29:54,244 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:29:54,245 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:54,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:54,245 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:54,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:54,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:54,285 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:29:54,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:29:54,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:54,296 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:29:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:54,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-25 22:29:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:54,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2022-11-25 22:29:54,386 INFO L350 Elim1Store]: Elim1 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 40 [2022-11-25 22:29:54,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:29:54,419 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:29:54,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:29:54,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:29:54,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:29:55,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8812#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~R~0#1|) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~R~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 22:29:55,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:29:55,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:29:55,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192] total 383 [2022-11-25 22:29:55,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372382568] [2022-11-25 22:29:55,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:29:55,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-11-25 22:29:55,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-11-25 22:29:55,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73552, Invalid=77380, Unknown=0, NotChecked=0, Total=150932 [2022-11-25 22:29:55,739 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:57,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:57,932 INFO L93 Difference]: Finished difference Result 524 states and 717 transitions. [2022-11-25 22:29:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-25 22:29:57,933 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2022-11-25 22:29:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:57,935 INFO L225 Difference]: With dead ends: 524 [2022-11-25 22:29:57,936 INFO L226 Difference]: Without dead ends: 454 [2022-11-25 22:29:57,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 70.2s TimeCoverageRelationStatistics Valid=73552, Invalid=77380, Unknown=0, NotChecked=0, Total=150932 [2022-11-25 22:29:57,944 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:57,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:29:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-25 22:29:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-11-25 22:29:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.0044150110375276) internal successors, (455), 453 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2022-11-25 22:29:58,000 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 261 [2022-11-25 22:29:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:58,000 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2022-11-25 22:29:58,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2022-11-25 22:29:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-11-25 22:29:58,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:58,010 INFO L195 NwaCegarLoop]: trace histogram [382, 23, 22, 22, 1, 1, 1, 1] [2022-11-25 22:29:58,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:29:58,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 22:29:58,225 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:29:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2032914646, now seen corresponding path program 11 times [2022-11-25 22:29:58,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:58,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730451122] [2022-11-25 22:29:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:58,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:58,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:29:58,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143691879] [2022-11-25 22:29:58,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:29:58,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:58,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:58,446 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:58,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:35:34,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-25 22:35:34,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:35:34,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 22:35:34,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:39,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:35:39,080 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 45 [2022-11-25 22:35:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 73890 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-25 22:35:39,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:06,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:36:06,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 498 treesize of output 686 [2022-11-25 22:38:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 73890 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-25 22:38:18,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:38:18,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730451122] [2022-11-25 22:38:18,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:38:18,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143691879] [2022-11-25 22:38:18,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143691879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:38:18,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020549183] [2022-11-25 22:38:18,693 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:38:18,694 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:38:18,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:38:18,694 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:38:18,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:38:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,740 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:38:18,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:38:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,753 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:38:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-25 22:38:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2022-11-25 22:38:18,815 INFO L350 Elim1Store]: Elim1 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 40 [2022-11-25 22:38:18,849 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:18,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:38:18,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-25 22:38:18,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:38:18,995 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:38:19,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13394#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~R~0#1|) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~R~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 22:38:19,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:38:19,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:38:19,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2022-11-25 22:38:19,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794265787] [2022-11-25 22:38:19,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:38:19,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-25 22:38:19,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:38:19,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-25 22:38:19,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1022, Invalid=2170, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 22:38:19,765 INFO L87 Difference]: Start difference. First operand 454 states and 455 transitions. Second operand has 52 states, 52 states have (on average 2.75) internal successors, (143), 51 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:38:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:38:34,759 INFO L93 Difference]: Finished difference Result 530 states and 554 transitions. [2022-11-25 22:38:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-25 22:38:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.75) internal successors, (143), 51 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2022-11-25 22:38:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:38:34,763 INFO L225 Difference]: With dead ends: 530 [2022-11-25 22:38:34,763 INFO L226 Difference]: Without dead ends: 528 [2022-11-25 22:38:34,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1401 GetRequests, 1302 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=3243, Invalid=6857, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 22:38:34,765 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 140 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:38:34,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 50 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:38:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-11-25 22:38:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 526. [2022-11-25 22:38:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.0038095238095237) internal successors, (527), 525 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:38:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 527 transitions. [2022-11-25 22:38:34,848 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 527 transitions. Word has length 453 [2022-11-25 22:38:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:38:34,849 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 527 transitions. [2022-11-25 22:38:34,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.75) internal successors, (143), 51 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:38:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 527 transitions. [2022-11-25 22:38:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-11-25 22:38:34,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:38:34,855 INFO L195 NwaCegarLoop]: trace histogram [382, 47, 46, 46, 1, 1, 1, 1] [2022-11-25 22:38:34,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:38:35,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 22:38:35,067 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:38:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:38:35,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1611860778, now seen corresponding path program 12 times [2022-11-25 22:38:35,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:38:35,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27699921] [2022-11-25 22:38:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:38:35,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:38:35,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:38:35,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642383017] [2022-11-25 22:38:35,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:38:35,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:38:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:38:35,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:38:35,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692710e4-c8ed-4eb7-b378-388d597935f5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:38:37,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:38:37,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:38:37,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 4291 conjuncts, 385 conjunts are in the unsatisfiable core [2022-11-25 22:38:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:40:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 76350 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2022-11-25 22:40:02,094 INFO L328 TraceCheckSpWp]: Computing backward predicates...