./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9 --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 be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --- 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-6b4ec56 [2022-11-20 20:43:18,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:43:18,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:43:18,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:43:18,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:43:18,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:43:18,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:43:18,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:43:18,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:43:18,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:43:18,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:43:18,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:43:18,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:43:18,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:43:18,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:43:18,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:43:18,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:43:18,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:43:18,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:43:18,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:43:18,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:43:18,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:43:18,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:43:18,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:43:18,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:43:18,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:43:18,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:43:18,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:43:18,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:43:18,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:43:18,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:43:18,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:43:18,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:43:18,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:43:18,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:43:18,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:43:18,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:43:18,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:43:18,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:43:18,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:43:18,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:43:18,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:43:18,189 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:43:18,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:43:18,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:43:18,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:43:18,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:43:18,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:43:18,191 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:43:18,191 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:43:18,191 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:43:18,192 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:43:18,192 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:43:18,192 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:43:18,192 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:43:18,192 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:43:18,193 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:43:18,193 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:43:18,193 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:43:18,193 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:43:18,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:43:18,194 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:43:18,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:43:18,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:43:18,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:43:18,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:43:18,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:43:18,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:43:18,196 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:43:18,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:43:18,196 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:43:18,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:43:18,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:43:18,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:43:18,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:43:18,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:43:18,197 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:43:18,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:43:18,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:43:18,198 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:43:18,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:43:18,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:43:18,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:43:18,199 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_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 [2022-11-20 20:43:18,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:43:18,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:43:18,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:43:18,614 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:43:18,615 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:43:18,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/loops-crafted-1/in-de32.c [2022-11-20 20:43:21,781 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:43:22,029 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:43:22,030 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/sv-benchmarks/c/loops-crafted-1/in-de32.c [2022-11-20 20:43:22,037 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/data/b85f4c945/aaf463bfadeb4ceaa179b04560e51296/FLAG0710e4724 [2022-11-20 20:43:22,055 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/data/b85f4c945/aaf463bfadeb4ceaa179b04560e51296 [2022-11-20 20:43:22,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:43:22,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:43:22,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:43:22,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:43:22,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:43:22,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260dfc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22, skipping insertion in model container [2022-11-20 20:43:22,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:43:22,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:43:22,309 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_ff16ac15-095b-49e8-b55c-caf7af805bdf/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2022-11-20 20:43:22,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:43:22,346 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:43:22,363 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_ff16ac15-095b-49e8-b55c-caf7af805bdf/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2022-11-20 20:43:22,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:43:22,390 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:43:22,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22 WrapperNode [2022-11-20 20:43:22,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:43:22,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:43:22,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:43:22,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:43:22,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,440 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-11-20 20:43:22,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:43:22,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:43:22,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:43:22,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:43:22,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,478 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:43:22,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:43:22,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:43:22,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:43:22,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (1/1) ... [2022-11-20 20:43:22,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:43:22,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:22,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:43:22,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:43:22,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:43:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:43:22,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:43:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:43:22,653 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:43:22,656 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:43:22,802 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:43:22,835 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:43:22,835 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 20:43:22,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:43:22 BoogieIcfgContainer [2022-11-20 20:43:22,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:43:22,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:43:22,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:43:22,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:43:22,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:43:22" (1/3) ... [2022-11-20 20:43:22,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33135365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:43:22, skipping insertion in model container [2022-11-20 20:43:22,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:43:22" (2/3) ... [2022-11-20 20:43:22,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33135365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:43:22, skipping insertion in model container [2022-11-20 20:43:22,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:43:22" (3/3) ... [2022-11-20 20:43:22,849 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2022-11-20 20:43:22,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:43:22,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:43:22,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:43:22,948 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;@5b039660, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:43:22,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:43:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:43:22,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:22,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:43:22,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1774769397, now seen corresponding path program 1 times [2022-11-20 20:43:22,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:22,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731537734] [2022-11-20 20:43:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:22,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:23,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:23,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731537734] [2022-11-20 20:43:23,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731537734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:23,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:23,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:43:23,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192269416] [2022-11-20 20:43:23,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:23,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:23,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:23,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:23,483 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) 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) [2022-11-20 20:43:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:23,562 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2022-11-20 20:43:23,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:43:23,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 [2022-11-20 20:43:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:23,573 INFO L225 Difference]: With dead ends: 18 [2022-11-20 20:43:23,574 INFO L226 Difference]: Without dead ends: 9 [2022-11-20 20:43:23,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:23,581 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:23,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:43:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-20 20:43:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-20 20:43:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2022-11-20 20:43:23,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 6 [2022-11-20 20:43:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:23,644 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2022-11-20 20:43:23,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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) [2022-11-20 20:43:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2022-11-20 20:43:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:43:23,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:23,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:23,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:43:23,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash 786204085, now seen corresponding path program 1 times [2022-11-20 20:43:23,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:23,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723743648] [2022-11-20 20:43:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:23,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:23,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:23,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723743648] [2022-11-20 20:43:23,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723743648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:23,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:23,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:43:23,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559927301] [2022-11-20 20:43:23,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:23,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:23,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:23,767 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:23,808 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-11-20 20:43:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:43:23,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:43:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:23,809 INFO L225 Difference]: With dead ends: 17 [2022-11-20 20:43:23,810 INFO L226 Difference]: Without dead ends: 10 [2022-11-20 20:43:23,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:23,812 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:23,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:43:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-20 20:43:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-20 20:43:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-20 20:43:23,818 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2022-11-20 20:43:23,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:23,818 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-20 20:43:23,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-20 20:43:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:43:23,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:23,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:23,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:43:23,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:23,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1794229100, now seen corresponding path program 1 times [2022-11-20 20:43:23,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:23,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022460257] [2022-11-20 20:43:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:23,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:23,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022460257] [2022-11-20 20:43:23,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022460257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:23,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117955424] [2022-11-20 20:43:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:23,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:23,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:23,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:23,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:43:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:43:24,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:24,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:24,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117955424] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:24,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:43:24,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2022-11-20 20:43:24,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995968736] [2022-11-20 20:43:24,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:24,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:24,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:24,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:43:24,275 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-20 20:43:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:24,339 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2022-11-20 20:43:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:43:24,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-11-20 20:43:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:24,342 INFO L225 Difference]: With dead ends: 14 [2022-11-20 20:43:24,343 INFO L226 Difference]: Without dead ends: 11 [2022-11-20 20:43:24,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:43:24,348 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:24,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:43:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-20 20:43:24,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-20 20:43:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2022-11-20 20:43:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-20 20:43:24,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 8 [2022-11-20 20:43:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:24,361 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-20 20:43:24,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-20 20:43:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-20 20:43:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:43:24,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:24,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:24,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:24,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 20:43:24,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1764408309, now seen corresponding path program 1 times [2022-11-20 20:43:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:24,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900402682] [2022-11-20 20:43:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:24,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:24,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:24,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900402682] [2022-11-20 20:43:24,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900402682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:24,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507441866] [2022-11-20 20:43:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:24,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:24,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:24,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:24,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:43:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:24,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:43:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:24,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:24,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507441866] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:24,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:43:24,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-20 20:43:24,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949552950] [2022-11-20 20:43:24,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:24,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:24,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:43:24,953 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-20 20:43:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:24,985 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2022-11-20 20:43:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:43:24,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-11-20 20:43:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:24,987 INFO L225 Difference]: With dead ends: 15 [2022-11-20 20:43:24,987 INFO L226 Difference]: Without dead ends: 10 [2022-11-20 20:43:24,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:43:24,991 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:24,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 3 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:43:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-20 20:43:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-20 20:43:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-20 20:43:24,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2022-11-20 20:43:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:24,998 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-20 20:43:24,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-20 20:43:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-20 20:43:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:43:24,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:24,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:25,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:25,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:25,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:25,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:25,206 INFO L85 PathProgramCache]: Analyzing trace with hash 212774083, now seen corresponding path program 1 times [2022-11-20 20:43:25,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:25,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899012857] [2022-11-20 20:43:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:25,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:25,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:25,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899012857] [2022-11-20 20:43:25,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899012857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:25,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395162365] [2022-11-20 20:43:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:25,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:25,444 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:25,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:43:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:25,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:43:25,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:25,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:25,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395162365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:25,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180591591] [2022-11-20 20:43:25,756 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:25,756 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:25,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:25,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:25,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:26,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:26,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '335#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:26,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:26,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:26,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-20 20:43:26,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145985664] [2022-11-20 20:43:26,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:26,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:43:26,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:43:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:43:26,225 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-20 20:43:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:26,309 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-20 20:43:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:43:26,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 [2022-11-20 20:43:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:26,310 INFO L225 Difference]: With dead ends: 16 [2022-11-20 20:43:26,311 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 20:43:26,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:43:26,315 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:26,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:43:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 20:43:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-20 20:43:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-20 20:43:26,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2022-11-20 20:43:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:26,329 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-20 20:43:26,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-20 20:43:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-20 20:43:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:43:26,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:26,330 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:26,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:26,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:26,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:26,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1375886091, now seen corresponding path program 2 times [2022-11-20 20:43:26,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:26,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114904912] [2022-11-20 20:43:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:26,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:26,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114904912] [2022-11-20 20:43:26,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114904912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007974192] [2022-11-20 20:43:26,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:43:26,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:26,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:26,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:43:26,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:43:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:26,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:43:26,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:26,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:26,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007974192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:26,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731009055] [2022-11-20 20:43:26,918 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:26,918 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:26,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:26,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:26,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:27,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:27,174 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '452#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:27,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:27,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:27,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2022-11-20 20:43:27,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994851400] [2022-11-20 20:43:27,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:27,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:43:27,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:27,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:43:27,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:43:27,176 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:27,307 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-11-20 20:43:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:43:27,308 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 20:43:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:27,310 INFO L225 Difference]: With dead ends: 36 [2022-11-20 20:43:27,310 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 20:43:27,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:43:27,311 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:27,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 16 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:43:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 20:43:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 12. [2022-11-20 20:43:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2022-11-20 20:43:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-20 20:43:27,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2022-11-20 20:43:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:27,321 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-20 20:43:27,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-20 20:43:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:43:27,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:27,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:27,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:27,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:27,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:27,532 INFO L85 PathProgramCache]: Analyzing trace with hash -60019915, now seen corresponding path program 3 times [2022-11-20 20:43:27,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:27,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370356392] [2022-11-20 20:43:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:27,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:43:27,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370356392] [2022-11-20 20:43:27,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370356392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177926749] [2022-11-20 20:43:27,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:43:27,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:27,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:27,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:27,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:43:27,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:43:27,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:43:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:43:27,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:43:27,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177926749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:27,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358810858] [2022-11-20 20:43:27,844 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:27,844 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:27,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:27,845 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:27,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:27,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:28,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:28,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:28,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:28,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-20 20:43:28,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101536909] [2022-11-20 20:43:28,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:28,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:43:28,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:43:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:43:28,098 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:28,265 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-20 20:43:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:43:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:43:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:28,267 INFO L225 Difference]: With dead ends: 33 [2022-11-20 20:43:28,267 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 20:43:28,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:43:28,268 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:28,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 16 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:43:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 20:43:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-20 20:43:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-20 20:43:28,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2022-11-20 20:43:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:28,281 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-20 20:43:28,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-20 20:43:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:43:28,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:28,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:28,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:28,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 20:43:28,487 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash -454325109, now seen corresponding path program 4 times [2022-11-20 20:43:28,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:28,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992702374] [2022-11-20 20:43:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:43:28,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:28,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992702374] [2022-11-20 20:43:28,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992702374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:28,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181732481] [2022-11-20 20:43:28,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:43:28,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:28,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:28,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:43:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:28,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:43:28,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:43:28,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:43:28,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181732481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:28,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931422229] [2022-11-20 20:43:28,836 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:28,837 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:28,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:28,837 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:28,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:28,929 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:29,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '796#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:29,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:29,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:29,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-20 20:43:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485225206] [2022-11-20 20:43:29,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:29,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:43:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:29,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:43:29,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:43:29,063 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:29,156 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-11-20 20:43:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:43:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:43:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:29,158 INFO L225 Difference]: With dead ends: 32 [2022-11-20 20:43:29,158 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 20:43:29,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:43:29,159 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:29,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:43:29,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 20:43:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-20 20:43:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) 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) [2022-11-20 20:43:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-20 20:43:29,181 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2022-11-20 20:43:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:29,182 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-20 20:43:29,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-20 20:43:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:43:29,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:29,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:29,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 20:43:29,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:29,390 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:29,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash 209136020, now seen corresponding path program 5 times [2022-11-20 20:43:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:29,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592185952] [2022-11-20 20:43:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:29,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:29,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592185952] [2022-11-20 20:43:29,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592185952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:29,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225915878] [2022-11-20 20:43:29,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:43:29,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:29,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:29,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:29,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:43:29,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:43:29,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:43:29,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:29,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:29,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225915878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:29,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218688800] [2022-11-20 20:43:29,872 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:29,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:29,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:29,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:29,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:29,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:30,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '997#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:30,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:30,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:30,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-11-20 20:43:30,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677158936] [2022-11-20 20:43:30,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:30,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 20:43:30,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 20:43:30,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:43:30,096 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:30,505 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-11-20 20:43:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:43:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:43:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:30,506 INFO L225 Difference]: With dead ends: 73 [2022-11-20 20:43:30,506 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 20:43:30,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:43:30,508 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:30,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:43:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 20:43:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 24. [2022-11-20 20:43:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-20 20:43:30,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2022-11-20 20:43:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:30,531 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-20 20:43:30,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-20 20:43:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:43:30,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:30,533 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:30,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 20:43:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 20:43:30,739 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:30,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1135226996, now seen corresponding path program 6 times [2022-11-20 20:43:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:30,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101487621] [2022-11-20 20:43:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:30,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:30,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101487621] [2022-11-20 20:43:30,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101487621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801054606] [2022-11-20 20:43:30,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:43:30,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:30,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:30,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:30,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:43:30,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:43:30,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:30,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:43:30,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:31,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:43:31,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801054606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:31,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330978798] [2022-11-20 20:43:31,293 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:31,294 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:31,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:31,294 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:31,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:31,379 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:31,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1300#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:31,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:31,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:31,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-20 20:43:31,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639383639] [2022-11-20 20:43:31,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:31,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 20:43:31,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:31,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 20:43:31,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-20 20:43:31,545 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:32,134 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-11-20 20:43:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 20:43:32,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:43:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:32,136 INFO L225 Difference]: With dead ends: 51 [2022-11-20 20:43:32,136 INFO L226 Difference]: Without dead ends: 41 [2022-11-20 20:43:32,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:43:32,138 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:32,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:43:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-20 20:43:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-11-20 20:43:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2022-11-20 20:43:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-11-20 20:43:32,169 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 15 [2022-11-20 20:43:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:32,169 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-11-20 20:43:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-11-20 20:43:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:43:32,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:32,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:32,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:32,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 20:43:32,377 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2107416637, now seen corresponding path program 7 times [2022-11-20 20:43:32,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:32,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664897970] [2022-11-20 20:43:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:32,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:32,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664897970] [2022-11-20 20:43:32,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664897970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321025358] [2022-11-20 20:43:32,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:43:32,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:32,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:32,538 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:32,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:43:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:43:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:32,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:32,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321025358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:32,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340328411] [2022-11-20 20:43:32,703 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:32,704 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:32,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:32,704 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:32,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:32,784 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:32,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1570#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:32,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:32,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:32,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-20 20:43:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851269505] [2022-11-20 20:43:32,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:43:32,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:43:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:43:32,897 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:33,020 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-11-20 20:43:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:43:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:43:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:33,024 INFO L225 Difference]: With dead ends: 47 [2022-11-20 20:43:33,025 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 20:43:33,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:43:33,026 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:33,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:43:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 20:43:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-11-20 20:43:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-11-20 20:43:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-20 20:43:33,065 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2022-11-20 20:43:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:33,065 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-20 20:43:33,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-20 20:43:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:43:33,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:33,067 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:33,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:33,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:33,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:33,273 INFO L85 PathProgramCache]: Analyzing trace with hash -239059381, now seen corresponding path program 8 times [2022-11-20 20:43:33,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:33,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026226039] [2022-11-20 20:43:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:33,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:33,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:33,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026226039] [2022-11-20 20:43:33,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026226039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:33,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858375669] [2022-11-20 20:43:33,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:43:33,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:33,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:33,486 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:33,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:43:33,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:43:33,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:43:33,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:33,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:43:33,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858375669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:33,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820302548] [2022-11-20 20:43:33,925 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:33,925 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:33,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:33,926 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:33,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:34,005 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:34,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1845#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:34,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:34,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:34,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-11-20 20:43:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396686833] [2022-11-20 20:43:34,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:34,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 20:43:34,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:34,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 20:43:34,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:43:34,183 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2022-11-20 20:43:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:34,723 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-11-20 20:43:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 20:43:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:43:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:34,726 INFO L225 Difference]: With dead ends: 79 [2022-11-20 20:43:34,726 INFO L226 Difference]: Without dead ends: 67 [2022-11-20 20:43:34,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:43:34,728 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:34,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 24 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:43:34,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-20 20:43:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 31. [2022-11-20 20:43:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2022-11-20 20:43:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-20 20:43:34,759 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2022-11-20 20:43:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:34,759 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-20 20:43:34,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2022-11-20 20:43:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-20 20:43:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 20:43:34,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:34,760 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:34,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:34,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:34,967 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:34,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:34,967 INFO L85 PathProgramCache]: Analyzing trace with hash 881880980, now seen corresponding path program 9 times [2022-11-20 20:43:34,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:34,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200950801] [2022-11-20 20:43:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:34,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:43:35,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:35,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200950801] [2022-11-20 20:43:35,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200950801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:35,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479133367] [2022-11-20 20:43:35,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:43:35,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:35,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:35,201 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:35,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:43:35,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:43:35,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 20:43:35,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:43:35,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:43:35,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479133367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:35,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400132600] [2022-11-20 20:43:35,652 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:35,652 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:35,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:35,653 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:35,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:35,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:35,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2199#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:35,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:35,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:35,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-11-20 20:43:35,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099279792] [2022-11-20 20:43:35,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:35,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:43:35,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:35,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:43:35,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:43:35,902 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2022-11-20 20:43:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:36,962 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-11-20 20:43:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 20:43:36,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 20:43:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:36,964 INFO L225 Difference]: With dead ends: 63 [2022-11-20 20:43:36,964 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 20:43:36,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 20:43:36,965 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:36,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:43:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 20:43:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-11-20 20:43:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 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) [2022-11-20 20:43:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-20 20:43:37,003 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 18 [2022-11-20 20:43:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:37,003 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-20 20:43:37,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2022-11-20 20:43:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-20 20:43:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 20:43:37,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:37,004 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:37,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:37,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 20:43:37,210 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:37,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:37,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1384460789, now seen corresponding path program 10 times [2022-11-20 20:43:37,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:37,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840258459] [2022-11-20 20:43:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:37,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:43:37,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:37,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840258459] [2022-11-20 20:43:37,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840258459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:37,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534796910] [2022-11-20 20:43:37,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:43:37,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:37,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:37,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:43:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:37,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:43:37,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:43:37,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:43:37,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534796910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043757507] [2022-11-20 20:43:37,645 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:37,645 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:37,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:37,646 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:37,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:37,736 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:37,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2538#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:37,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:37,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:37,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-11-20 20:43:37,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882481633] [2022-11-20 20:43:37,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:37,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:43:37,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:43:37,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:43:37,862 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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) [2022-11-20 20:43:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:38,008 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-11-20 20:43:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:43:38,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 18 [2022-11-20 20:43:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:38,011 INFO L225 Difference]: With dead ends: 57 [2022-11-20 20:43:38,011 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 20:43:38,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:43:38,012 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:38,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:43:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 20:43:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-11-20 20:43:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 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) [2022-11-20 20:43:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-11-20 20:43:38,051 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 18 [2022-11-20 20:43:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:38,051 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-11-20 20:43:38,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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) [2022-11-20 20:43:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-11-20 20:43:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 20:43:38,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:38,053 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:38,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:38,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 20:43:38,264 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948939, now seen corresponding path program 11 times [2022-11-20 20:43:38,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:38,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605259339] [2022-11-20 20:43:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:38,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:43:38,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:38,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605259339] [2022-11-20 20:43:38,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605259339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:38,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935048042] [2022-11-20 20:43:38,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:43:38,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:38,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:38,536 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:38,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 20:43:38,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:43:38,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:38,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 20:43:38,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:43:38,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:43:39,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935048042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:39,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1003713630] [2022-11-20 20:43:39,235 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:39,235 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:39,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:39,235 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:39,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:39,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:39,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2878#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:39,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:39,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:39,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2022-11-20 20:43:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883548116] [2022-11-20 20:43:39,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:39,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:43:39,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:43:39,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-11-20 20:43:39,507 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:40,703 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-11-20 20:43:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 20:43:40,704 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 20:43:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:40,704 INFO L225 Difference]: With dead ends: 108 [2022-11-20 20:43:40,705 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 20:43:40,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 20:43:40,707 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 107 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:40,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 38 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:43:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 20:43:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 37. [2022-11-20 20:43:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-20 20:43:40,739 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2022-11-20 20:43:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:40,739 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-20 20:43:40,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:40,740 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-20 20:43:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 20:43:40,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:40,741 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:40,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:40,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:40,947 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash -264219124, now seen corresponding path program 12 times [2022-11-20 20:43:40,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:40,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316910153] [2022-11-20 20:43:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:43:41,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:41,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316910153] [2022-11-20 20:43:41,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316910153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649528340] [2022-11-20 20:43:41,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:43:41,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:41,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:41,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:41,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 20:43:41,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:43:41,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:41,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 20:43:41,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:43:41,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 20:43:41,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649528340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:41,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943596294] [2022-11-20 20:43:41,971 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:41,971 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:41,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:41,971 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:41,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:42,037 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:42,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3334#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:42,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:42,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:42,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 29 [2022-11-20 20:43:42,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736798051] [2022-11-20 20:43:42,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:42,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 20:43:42,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:42,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 20:43:42,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 20:43:42,224 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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) [2022-11-20 20:43:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:44,038 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-11-20 20:43:44,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 20:43:44,038 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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 [2022-11-20 20:43:44,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:44,039 INFO L225 Difference]: With dead ends: 74 [2022-11-20 20:43:44,039 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 20:43:44,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 20:43:44,041 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:44,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:43:44,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 20:43:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-11-20 20:43:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 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) [2022-11-20 20:43:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-11-20 20:43:44,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 21 [2022-11-20 20:43:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:44,098 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-11-20 20:43:44,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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) [2022-11-20 20:43:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-11-20 20:43:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 20:43:44,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:44,099 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:44,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:44,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 20:43:44,310 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash -670240061, now seen corresponding path program 13 times [2022-11-20 20:43:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:44,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574443978] [2022-11-20 20:43:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:44,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:43:44,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:44,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574443978] [2022-11-20 20:43:44,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574443978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:44,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542502159] [2022-11-20 20:43:44,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:43:44,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:44,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:44,622 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:44,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 20:43:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:44,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:43:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:43:44,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:43:44,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542502159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:44,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371992141] [2022-11-20 20:43:44,799 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:44,799 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:44,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:44,800 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:44,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:44,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:45,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3736#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:45,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:45,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:45,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-11-20 20:43:45,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591948131] [2022-11-20 20:43:45,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:45,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:43:45,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:45,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:43:45,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:43:45,080 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:45,283 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-11-20 20:43:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:43:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 20:43:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:45,285 INFO L225 Difference]: With dead ends: 67 [2022-11-20 20:43:45,285 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 20:43:45,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:43:45,286 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:45,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:43:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 20:43:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-11-20 20:43:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 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) [2022-11-20 20:43:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-20 20:43:45,338 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 21 [2022-11-20 20:43:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:45,338 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-20 20:43:45,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-20 20:43:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:43:45,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:45,340 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:45,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 20:43:45,546 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:45,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:45,546 INFO L85 PathProgramCache]: Analyzing trace with hash -647325269, now seen corresponding path program 14 times [2022-11-20 20:43:45,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:45,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766585038] [2022-11-20 20:43:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:45,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:43:45,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:45,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766585038] [2022-11-20 20:43:45,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766585038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:45,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423155009] [2022-11-20 20:43:45,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:43:45,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:45,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:45,931 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:45,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 20:43:46,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:43:46,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:43:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:43:46,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:43:46,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423155009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041288811] [2022-11-20 20:43:46,717 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:46,718 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:46,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:46,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:46,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:46,792 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:47,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4144#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:47,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:47,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:47,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-11-20 20:43:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396960187] [2022-11-20 20:43:47,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:47,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 20:43:47,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 20:43:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 20:43:47,012 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 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) [2022-11-20 20:43:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:53,857 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2022-11-20 20:43:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 20:43:53,857 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 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 24 [2022-11-20 20:43:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:53,858 INFO L225 Difference]: With dead ends: 122 [2022-11-20 20:43:53,858 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 20:43:53,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1321, Invalid=7235, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 20:43:53,861 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 267 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:53,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 36 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:43:53,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 20:43:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2022-11-20 20:43:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 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) [2022-11-20 20:43:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-11-20 20:43:53,914 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 24 [2022-11-20 20:43:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:53,914 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-11-20 20:43:53,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 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) [2022-11-20 20:43:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-11-20 20:43:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:43:53,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:53,915 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:53,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:54,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 20:43:54,124 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:54,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1072107637, now seen corresponding path program 15 times [2022-11-20 20:43:54,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:54,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920331034] [2022-11-20 20:43:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:54,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 20:43:54,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:54,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920331034] [2022-11-20 20:43:54,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920331034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:54,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51157866] [2022-11-20 20:43:54,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:43:54,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:54,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:54,474 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:54,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 20:43:54,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:43:54,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:54,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 20:43:54,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 20:43:54,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 20:43:54,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51157866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:54,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188003637] [2022-11-20 20:43:54,686 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:54,686 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:54,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:54,687 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:54,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:54,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:54,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4757#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:54,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:54,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:54,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2022-11-20 20:43:54,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807284592] [2022-11-20 20:43:54,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:54,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 20:43:54,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:54,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 20:43:54,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:43:54,909 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:55,202 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2022-11-20 20:43:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:43:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 20:43:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:55,204 INFO L225 Difference]: With dead ends: 90 [2022-11-20 20:43:55,204 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 20:43:55,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:43:55,205 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:55,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:43:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 20:43:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2022-11-20 20:43:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-11-20 20:43:55,282 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 24 [2022-11-20 20:43:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:55,283 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-11-20 20:43:55,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-11-20 20:43:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:43:55,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:55,284 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:55,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:55,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:55,491 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:55,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1422218667, now seen corresponding path program 16 times [2022-11-20 20:43:55,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:43:55,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554929961] [2022-11-20 20:43:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:55,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:43:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 20:43:55,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:43:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554929961] [2022-11-20 20:43:55,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554929961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:43:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400630517] [2022-11-20 20:43:55,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:43:55,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:55,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:55,938 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:55,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 20:43:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 20:43:56,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:56,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:43:56,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400630517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:56,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1813238283] [2022-11-20 20:43:56,941 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:43:56,941 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:43:56,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:43:56,941 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:43:56,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:43:57,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:43:57,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5264#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:43:57,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:43:57,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:43:57,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 40 [2022-11-20 20:43:57,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586933218] [2022-11-20 20:43:57,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:57,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 20:43:57,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:43:57,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 20:43:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 20:43:57,268 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 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) [2022-11-20 20:44:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:01,342 INFO L93 Difference]: Finished difference Result 214 states and 251 transitions. [2022-11-20 20:44:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 20:44:01,343 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 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 [2022-11-20 20:44:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:01,344 INFO L225 Difference]: With dead ends: 214 [2022-11-20 20:44:01,344 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 20:44:01,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1440, Invalid=4880, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 20:44:01,348 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 229 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:01,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 18 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:44:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 20:44:01,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 60. [2022-11-20 20:44:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 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) [2022-11-20 20:44:01,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-11-20 20:44:01,406 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 27 [2022-11-20 20:44:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:01,407 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-11-20 20:44:01,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 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) [2022-11-20 20:44:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-11-20 20:44:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:44:01,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:01,408 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:01,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:01,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:01,608 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:44:01,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:01,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1600690749, now seen corresponding path program 17 times [2022-11-20 20:44:01,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:44:01,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710033688] [2022-11-20 20:44:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:01,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:44:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:44:01,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:44:01,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710033688] [2022-11-20 20:44:01,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710033688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:44:01,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137895622] [2022-11-20 20:44:01,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:44:01,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:01,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:44:01,983 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:44:02,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 20:44:02,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 20:44:02,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:44:02,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 20:44:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:44:02,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:44:02,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137895622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:44:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1559346262] [2022-11-20 20:44:02,342 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:44:02,343 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:44:02,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:44:02,344 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:44:02,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:44:02,405 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:44:02,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6048#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:44:02,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:44:02,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:44:02,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2022-11-20 20:44:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497955138] [2022-11-20 20:44:02,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:44:02,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:44:02,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:44:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:44:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:44:02,579 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2022-11-20 20:44:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:02,949 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2022-11-20 20:44:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:44:02,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) Word has length 27 [2022-11-20 20:44:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:02,951 INFO L225 Difference]: With dead ends: 101 [2022-11-20 20:44:02,951 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 20:44:02,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:44:02,952 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:02,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:44:02,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 20:44:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2022-11-20 20:44:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 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) [2022-11-20 20:44:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-11-20 20:44:03,018 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 27 [2022-11-20 20:44:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:03,019 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-11-20 20:44:03,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2022-11-20 20:44:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-11-20 20:44:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 20:44:03,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:03,020 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:03,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:03,226 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:44:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash -102855189, now seen corresponding path program 18 times [2022-11-20 20:44:03,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:44:03,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078408565] [2022-11-20 20:44:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:44:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:44:03,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:44:03,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078408565] [2022-11-20 20:44:03,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078408565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:44:03,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846377242] [2022-11-20 20:44:03,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:44:03,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:03,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:44:03,701 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:44:03,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 20:44:03,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:44:03,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:44:03,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 20:44:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:44:04,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 20:44:04,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846377242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:44:04,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218875060] [2022-11-20 20:44:04,728 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:44:04,728 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:44:04,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:44:04,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:44:04,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:44:04,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:44:05,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6587#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:44:05,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:44:05,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:44:05,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16] total 40 [2022-11-20 20:44:05,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60990233] [2022-11-20 20:44:05,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:44:05,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 20:44:05,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:44:05,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 20:44:05,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 20:44:05,057 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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) [2022-11-20 20:44:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:11,603 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2022-11-20 20:44:11,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 20:44:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 20:44:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:11,606 INFO L225 Difference]: With dead ends: 134 [2022-11-20 20:44:11,606 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 20:44:11,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=663, Invalid=5343, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 20:44:11,609 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 57 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:11,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 50 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 20:44:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 20:44:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2022-11-20 20:44:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 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) [2022-11-20 20:44:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-11-20 20:44:11,713 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 28 [2022-11-20 20:44:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:11,713 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-11-20 20:44:11,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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) [2022-11-20 20:44:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-11-20 20:44:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 20:44:11,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:11,714 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:11,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-20 20:44:11,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:11,920 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:44:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash -520490741, now seen corresponding path program 19 times [2022-11-20 20:44:11,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:44:11,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777205237] [2022-11-20 20:44:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:11,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:44:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:44:12,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:44:12,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777205237] [2022-11-20 20:44:12,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777205237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:44:12,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764799260] [2022-11-20 20:44:12,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:44:12,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:12,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:44:12,364 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:44:12,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 20:44:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 20:44:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:44:12,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:44:12,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764799260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:44:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488373943] [2022-11-20 20:44:12,606 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:44:12,606 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:44:12,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:44:12,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:44:12,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:44:12,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:44:12,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7286#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:44:12,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:44:12,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:44:12,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2022-11-20 20:44:12,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044323781] [2022-11-20 20:44:12,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:44:12,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:44:12,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:44:12,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:44:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:44:12,843 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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) [2022-11-20 20:44:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:13,304 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2022-11-20 20:44:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:44:13,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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 30 [2022-11-20 20:44:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:13,306 INFO L225 Difference]: With dead ends: 131 [2022-11-20 20:44:13,306 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 20:44:13,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:44:13,307 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:13,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:44:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 20:44:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2022-11-20 20:44:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 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) [2022-11-20 20:44:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-11-20 20:44:13,409 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 30 [2022-11-20 20:44:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:13,409 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-11-20 20:44:13,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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) [2022-11-20 20:44:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-11-20 20:44:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 20:44:13,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:13,410 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:13,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:13,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:13,615 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:44:13,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:13,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2032401620, now seen corresponding path program 20 times [2022-11-20 20:44:13,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:44:13,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846062921] [2022-11-20 20:44:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:13,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:44:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:44:14,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:44:14,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846062921] [2022-11-20 20:44:14,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846062921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:44:14,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027426884] [2022-11-20 20:44:14,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:44:14,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:14,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:44:14,139 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:44:14,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 20:44:14,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 20:44:14,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:44:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 20:44:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 20:44:14,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 20:44:16,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027426884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:44:16,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602930555] [2022-11-20 20:44:16,117 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:44:16,118 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:44:16,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:44:16,118 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:44:16,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:44:16,181 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:44:16,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7980#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:44:16,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:44:16,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:44:16,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 56 [2022-11-20 20:44:16,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550084837] [2022-11-20 20:44:16,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:44:16,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 20:44:16,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:44:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 20:44:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=2921, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 20:44:16,508 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 56 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 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) [2022-11-20 20:45:01,126 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:45:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:01,421 INFO L93 Difference]: Finished difference Result 214 states and 254 transitions. [2022-11-20 20:45:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-20 20:45:01,422 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 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 31 [2022-11-20 20:45:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:01,423 INFO L225 Difference]: With dead ends: 214 [2022-11-20 20:45:01,423 INFO L226 Difference]: Without dead ends: 160 [2022-11-20 20:45:01,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=3691, Invalid=22069, Unknown=0, NotChecked=0, Total=25760 [2022-11-20 20:45:01,428 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 547 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:01,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 66 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 20:45:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-20 20:45:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 101. [2022-11-20 20:45:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 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) [2022-11-20 20:45:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-11-20 20:45:01,520 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 31 [2022-11-20 20:45:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:01,520 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-11-20 20:45:01,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 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) [2022-11-20 20:45:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-11-20 20:45:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 20:45:01,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:01,520 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:01,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:01,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 20:45:01,721 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:45:01,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:01,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1257158851, now seen corresponding path program 21 times [2022-11-20 20:45:01,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:45:01,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935167548] [2022-11-20 20:45:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:01,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:45:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 20:45:02,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:45:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935167548] [2022-11-20 20:45:02,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935167548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:45:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793811388] [2022-11-20 20:45:02,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:45:02,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:45:02,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:45:02,183 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:45:02,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 20:45:02,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:45:02,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:45:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 20:45:02,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 20:45:02,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 20:45:02,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793811388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:02,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572556220] [2022-11-20 20:45:02,434 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:45:02,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:45:02,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:45:02,434 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:45:02,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:45:02,522 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:45:02,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9010#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:45:02,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:45:02,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:45:02,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2022-11-20 20:45:02,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075576558] [2022-11-20 20:45:02,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:45:02,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 20:45:02,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:45:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 20:45:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:45:02,669 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:03,114 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2022-11-20 20:45:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:45:03,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 20:45:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:03,115 INFO L225 Difference]: With dead ends: 140 [2022-11-20 20:45:03,115 INFO L226 Difference]: Without dead ends: 127 [2022-11-20 20:45:03,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:45:03,117 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:03,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 25 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:45:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-20 20:45:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2022-11-20 20:45:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 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) [2022-11-20 20:45:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-11-20 20:45:03,283 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 33 [2022-11-20 20:45:03,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:03,283 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-11-20 20:45:03,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-11-20 20:45:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 20:45:03,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:03,284 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 8, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:03,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:03,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 20:45:03,485 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:45:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:03,485 INFO L85 PathProgramCache]: Analyzing trace with hash -747966284, now seen corresponding path program 22 times [2022-11-20 20:45:03,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:45:03,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338230871] [2022-11-20 20:45:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:03,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:45:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:45:04,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:45:04,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338230871] [2022-11-20 20:45:04,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338230871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:45:04,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329177393] [2022-11-20 20:45:04,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:45:04,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:45:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:45:04,125 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:45:04,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 20:45:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 20:45:04,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:04,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-20 20:45:05,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329177393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:05,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119917124] [2022-11-20 20:45:05,582 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:45:05,582 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:45:05,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:45:05,583 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:45:05,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:45:05,654 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:45:05,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9753#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:45:05,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:45:05,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:45:05,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 20] total 51 [2022-11-20 20:45:05,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362483324] [2022-11-20 20:45:05,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:45:05,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 20:45:05,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:45:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 20:45:05,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2411, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 20:45:05,977 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 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) [2022-11-20 20:45:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:18,597 INFO L93 Difference]: Finished difference Result 424 states and 484 transitions. [2022-11-20 20:45:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 20:45:18,598 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 20:45:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:18,600 INFO L225 Difference]: With dead ends: 424 [2022-11-20 20:45:18,600 INFO L226 Difference]: Without dead ends: 395 [2022-11-20 20:45:18,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2892, Invalid=8880, Unknown=0, NotChecked=0, Total=11772 [2022-11-20 20:45:18,602 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 410 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:18,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 42 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 20:45:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-20 20:45:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 114. [2022-11-20 20:45:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 113 states have internal predecessors, (134), 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) [2022-11-20 20:45:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2022-11-20 20:45:18,747 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 34 [2022-11-20 20:45:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:18,747 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2022-11-20 20:45:18,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 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) [2022-11-20 20:45:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2022-11-20 20:45:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 20:45:18,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:18,748 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:18,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:18,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:45:18,949 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:45:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1218466763, now seen corresponding path program 23 times [2022-11-20 20:45:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:45:18,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698515756] [2022-11-20 20:45:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:18,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:45:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 20:45:19,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:45:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698515756] [2022-11-20 20:45:19,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698515756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:45:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381569154] [2022-11-20 20:45:19,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:45:19,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:45:19,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:45:19,536 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:45:19,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 20:45:19,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:45:19,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:45:19,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 20:45:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 20:45:20,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 20:45:21,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381569154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:21,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601152264] [2022-11-20 20:45:21,297 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:45:21,297 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:45:21,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:45:21,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:45:21,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:45:21,361 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:45:21,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11192#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:45:21,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:45:21,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:45:21,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 53 [2022-11-20 20:45:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948238801] [2022-11-20 20:45:21,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:45:21,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 20:45:21,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:45:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 20:45:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=2804, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 20:45:21,668 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand has 53 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:38,983 INFO L93 Difference]: Finished difference Result 167 states and 197 transitions. [2022-11-20 20:45:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 20:45:38,983 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 20:45:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:38,984 INFO L225 Difference]: With dead ends: 167 [2022-11-20 20:45:38,984 INFO L226 Difference]: Without dead ends: 142 [2022-11-20 20:45:38,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=742, Invalid=5110, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 20:45:38,988 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 43 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:38,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 52 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-20 20:45:38,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-20 20:45:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2022-11-20 20:45:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 124 states have internal predecessors, (145), 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) [2022-11-20 20:45:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2022-11-20 20:45:39,127 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 35 [2022-11-20 20:45:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:39,127 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2022-11-20 20:45:39,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2022-11-20 20:45:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 20:45:39,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:39,128 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:39,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:39,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 20:45:39,329 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:45:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash 139580043, now seen corresponding path program 24 times [2022-11-20 20:45:39,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:45:39,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42319334] [2022-11-20 20:45:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:39,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:45:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 20:45:39,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:45:39,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42319334] [2022-11-20 20:45:39,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42319334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:45:39,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520622793] [2022-11-20 20:45:39,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:45:39,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:45:39,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:45:39,806 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:45:39,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 20:45:39,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:45:39,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:45:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 20:45:39,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 20:45:39,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 20:45:40,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520622793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167900507] [2022-11-20 20:45:40,053 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:45:40,054 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:45:40,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:45:40,054 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:45:40,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:45:40,123 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:45:40,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12031#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:45:40,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:45:40,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:45:40,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2022-11-20 20:45:40,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746397850] [2022-11-20 20:45:40,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:45:40,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 20:45:40,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:45:40,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 20:45:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:45:40,284 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2022-11-20 20:45:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:40,950 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-11-20 20:45:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:45:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 36 [2022-11-20 20:45:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:40,952 INFO L225 Difference]: With dead ends: 168 [2022-11-20 20:45:40,952 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 20:45:40,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:45:40,953 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:40,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:45:40,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 20:45:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2022-11-20 20:45:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.162962962962963) internal successors, (157), 135 states have internal predecessors, (157), 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) [2022-11-20 20:45:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2022-11-20 20:45:41,152 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 36 [2022-11-20 20:45:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:41,153 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2022-11-20 20:45:41,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2022-11-20 20:45:41,153 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2022-11-20 20:45:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 20:45:41,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:41,153 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 9, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:41,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:41,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 20:45:41,354 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:45:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:41,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1868330580, now seen corresponding path program 25 times [2022-11-20 20:45:41,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:45:41,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904115663] [2022-11-20 20:45:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:41,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:45:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 20:45:42,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:45:42,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904115663] [2022-11-20 20:45:42,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904115663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:45:42,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049327365] [2022-11-20 20:45:42,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:45:42,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:45:42,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:45:42,034 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:45:42,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 20:45:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 20:45:42,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:42,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 20:45:43,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049327365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114673823] [2022-11-20 20:45:43,619 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:45:43,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:45:43,620 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:45:43,620 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:45:43,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:45:43,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:45:43,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12903#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:45:43,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:45:43,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:45:43,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 22] total 56 [2022-11-20 20:45:43,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722690387] [2022-11-20 20:45:43,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:45:43,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 20:45:43,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:45:43,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 20:45:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=2881, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 20:45:43,952 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:46:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:46:04,693 INFO L93 Difference]: Finished difference Result 536 states and 606 transitions. [2022-11-20 20:46:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-20 20:46:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 20:46:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:46:04,695 INFO L225 Difference]: With dead ends: 536 [2022-11-20 20:46:04,695 INFO L226 Difference]: Without dead ends: 481 [2022-11-20 20:46:04,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6102 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=4325, Invalid=13765, Unknown=0, NotChecked=0, Total=18090 [2022-11-20 20:46:04,698 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 374 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:46:04,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 51 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 20:46:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-20 20:46:04,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 124. [2022-11-20 20:46:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 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) [2022-11-20 20:46:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2022-11-20 20:46:04,929 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 37 [2022-11-20 20:46:04,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:46:04,929 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2022-11-20 20:46:04,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:46:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2022-11-20 20:46:04,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 20:46:04,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:46:04,930 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1] [2022-11-20 20:46:04,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-20 20:46:05,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 20:46:05,136 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:46:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:46:05,136 INFO L85 PathProgramCache]: Analyzing trace with hash -244089781, now seen corresponding path program 26 times [2022-11-20 20:46:05,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:46:05,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257800894] [2022-11-20 20:46:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:46:05,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:46:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:46:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-20 20:46:05,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:46:05,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257800894] [2022-11-20 20:46:05,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257800894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:46:05,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928395968] [2022-11-20 20:46:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:46:05,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:46:05,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:46:05,747 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:46:05,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 20:46:06,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 20:46:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:46:06,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 20:46:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:46:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-20 20:46:06,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:46:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-20 20:46:08,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928395968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:46:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87296368] [2022-11-20 20:46:08,174 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:46:08,175 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:46:08,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:46:08,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:46:08,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:46:08,244 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:46:08,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14652#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:46:08,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:46:08,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:46:08,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 58 [2022-11-20 20:46:08,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415982611] [2022-11-20 20:46:08,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:46:08,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 20:46:08,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:46:08,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 20:46:08,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3335, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 20:46:08,598 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:46:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:46:38,405 INFO L93 Difference]: Finished difference Result 181 states and 211 transitions. [2022-11-20 20:46:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 20:46:38,408 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 20:46:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:46:38,409 INFO L225 Difference]: With dead ends: 181 [2022-11-20 20:46:38,410 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 20:46:38,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=864, Invalid=6108, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 20:46:38,411 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:46:38,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 58 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 20:46:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 20:46:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2022-11-20 20:46:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 135 states have internal predecessors, (155), 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) [2022-11-20 20:46:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2022-11-20 20:46:38,615 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 38 [2022-11-20 20:46:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:46:38,616 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2022-11-20 20:46:38,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:46:38,616 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2022-11-20 20:46:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 20:46:38,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:46:38,616 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1] [2022-11-20 20:46:38,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 20:46:38,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:46:38,817 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:46:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:46:38,818 INFO L85 PathProgramCache]: Analyzing trace with hash -503387197, now seen corresponding path program 27 times [2022-11-20 20:46:38,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:46:38,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292991220] [2022-11-20 20:46:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:46:38,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:46:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:46:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-20 20:46:39,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:46:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292991220] [2022-11-20 20:46:39,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292991220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:46:39,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844089736] [2022-11-20 20:46:39,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:46:39,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:46:39,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:46:39,344 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:46:39,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 20:46:39,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:46:39,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:46:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 20:46:39,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:46:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-20 20:46:39,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:46:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-20 20:46:39,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844089736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:46:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009326701] [2022-11-20 20:46:39,617 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:46:39,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:46:39,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:46:39,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:46:39,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:46:39,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:46:39,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15564#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:46:39,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:46:39,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:46:39,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2022-11-20 20:46:39,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875810297] [2022-11-20 20:46:39,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:46:39,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 20:46:39,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:46:39,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 20:46:39,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:46:39,828 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-20 20:46:40,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:46:40,511 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2022-11-20 20:46:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:46:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 [2022-11-20 20:46:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:46:40,515 INFO L225 Difference]: With dead ends: 183 [2022-11-20 20:46:40,515 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 20:46:40,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:46:40,516 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:46:40,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:46:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 20:46:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 148. [2022-11-20 20:46:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1428571428571428) internal successors, (168), 147 states have internal predecessors, (168), 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) [2022-11-20 20:46:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2022-11-20 20:46:40,712 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 39 [2022-11-20 20:46:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:46:40,712 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2022-11-20 20:46:40,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-20 20:46:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2022-11-20 20:46:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 20:46:40,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:46:40,713 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 10, 1, 1, 1, 1, 1, 1] [2022-11-20 20:46:40,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 20:46:40,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:46:40,916 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:46:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:46:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash 689948084, now seen corresponding path program 28 times [2022-11-20 20:46:40,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:46:40,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643356330] [2022-11-20 20:46:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:46:40,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:46:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:46:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 20:46:41,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:46:41,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643356330] [2022-11-20 20:46:41,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643356330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:46:41,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485445877] [2022-11-20 20:46:41,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:46:41,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:46:41,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:46:41,633 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:46:41,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 20:46:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:46:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 20:46:41,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:46:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:46:42,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:46:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:46:43,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485445877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:46:43,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341287849] [2022-11-20 20:46:43,438 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:46:43,439 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:46:43,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:46:43,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:46:43,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:46:43,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:46:43,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16513#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:46:43,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:46:43,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:46:43,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 24] total 61 [2022-11-20 20:46:43,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929227279] [2022-11-20 20:46:43,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:46:43,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 20:46:43,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:46:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 20:46:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=3393, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 20:46:43,840 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 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) [2022-11-20 20:47:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:47:20,040 INFO L93 Difference]: Finished difference Result 640 states and 718 transitions. [2022-11-20 20:47:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-20 20:47:20,040 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-20 20:47:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:47:20,043 INFO L225 Difference]: With dead ends: 640 [2022-11-20 20:47:20,043 INFO L226 Difference]: Without dead ends: 577 [2022-11-20 20:47:20,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8156 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=5609, Invalid=17647, Unknown=0, NotChecked=0, Total=23256 [2022-11-20 20:47:20,046 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 546 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:47:20,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 84 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 20:47:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-20 20:47:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 130. [2022-11-20 20:47:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1472868217054264) internal successors, (148), 129 states have internal predecessors, (148), 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) [2022-11-20 20:47:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2022-11-20 20:47:20,272 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 40 [2022-11-20 20:47:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:47:20,272 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2022-11-20 20:47:20,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 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) [2022-11-20 20:47:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2022-11-20 20:47:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 20:47:20,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:47:20,273 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 5, 1, 1, 1, 1, 1, 1] [2022-11-20 20:47:20,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 20:47:20,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:47:20,474 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:47:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:47:20,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1172425347, now seen corresponding path program 29 times [2022-11-20 20:47:20,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:47:20,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093105579] [2022-11-20 20:47:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:47:20,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:47:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:47:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:47:21,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:47:21,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093105579] [2022-11-20 20:47:21,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093105579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:47:21,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594458066] [2022-11-20 20:47:21,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:47:21,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:47:21,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:47:21,142 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:47:21,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 20:47:21,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 20:47:21,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:47:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 20:47:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:47:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-20 20:47:22,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:47:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-20 20:47:23,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594458066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:47:23,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306432267] [2022-11-20 20:47:23,432 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:47:23,433 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:47:23,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:47:23,433 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:47:23,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:47:23,490 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:47:23,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18518#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:47:23,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:47:23,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:47:23,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 49 [2022-11-20 20:47:23,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463553152] [2022-11-20 20:47:23,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:47:23,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 20:47:23,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:47:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 20:47:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2493, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 20:47:23,816 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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) [2022-11-20 20:47:50,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:47:50,103 INFO L93 Difference]: Finished difference Result 273 states and 311 transitions. [2022-11-20 20:47:50,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-20 20:47:50,104 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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 41 [2022-11-20 20:47:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:47:50,104 INFO L225 Difference]: With dead ends: 273 [2022-11-20 20:47:50,105 INFO L226 Difference]: Without dead ends: 234 [2022-11-20 20:47:50,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5661 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=1633, Invalid=22237, Unknown=0, NotChecked=0, Total=23870 [2022-11-20 20:47:50,107 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 115 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3072 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 3072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:47:50,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 52 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 3072 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 20:47:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-20 20:47:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2022-11-20 20:47:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1166666666666667) internal successors, (201), 180 states have internal predecessors, (201), 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) [2022-11-20 20:47:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 201 transitions. [2022-11-20 20:47:50,387 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 201 transitions. Word has length 41 [2022-11-20 20:47:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:47:50,388 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 201 transitions. [2022-11-20 20:47:50,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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) [2022-11-20 20:47:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 201 transitions. [2022-11-20 20:47:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 20:47:50,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:47:50,389 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1] [2022-11-20 20:47:50,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 20:47:50,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:47:50,592 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:47:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:47:50,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1571515381, now seen corresponding path program 30 times [2022-11-20 20:47:50,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:47:50,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251391346] [2022-11-20 20:47:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:47:50,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:47:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:47:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 20:47:51,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:47:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251391346] [2022-11-20 20:47:51,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251391346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:47:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134568532] [2022-11-20 20:47:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:47:51,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:47:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:47:51,201 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:47:51,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 20:47:51,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:47:51,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:47:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-20 20:47:51,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:47:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 20:47:51,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:47:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 20:47:51,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134568532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:47:51,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287140656] [2022-11-20 20:47:51,439 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:47:51,439 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:47:51,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:47:51,440 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:47:51,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:47:51,494 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:47:51,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19883#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:47:51,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:47:51,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:47:51,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 17 [2022-11-20 20:47:51,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753561983] [2022-11-20 20:47:51,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:47:51,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 20:47:51,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:47:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 20:47:51,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:47:51,655 INFO L87 Difference]: Start difference. First operand 181 states and 201 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:47:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:47:52,774 INFO L93 Difference]: Finished difference Result 301 states and 328 transitions. [2022-11-20 20:47:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:47:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-20 20:47:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:47:52,776 INFO L225 Difference]: With dead ends: 301 [2022-11-20 20:47:52,776 INFO L226 Difference]: Without dead ends: 285 [2022-11-20 20:47:52,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:47:52,776 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:47:52,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:47:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-20 20:47:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 195. [2022-11-20 20:47:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1185567010309279) internal successors, (217), 194 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:47:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2022-11-20 20:47:53,157 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 42 [2022-11-20 20:47:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:47:53,158 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2022-11-20 20:47:53,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:47:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2022-11-20 20:47:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 20:47:53,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:47:53,159 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2022-11-20 20:47:53,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 20:47:53,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:47:53,364 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:47:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:47:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1529432267, now seen corresponding path program 31 times [2022-11-20 20:47:53,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:47:53,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133954374] [2022-11-20 20:47:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:47:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:47:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:47:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 20:47:54,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:47:54,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133954374] [2022-11-20 20:47:54,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133954374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:47:54,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057245546] [2022-11-20 20:47:54,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:47:54,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:47:54,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:47:54,045 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:47:54,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 20:47:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:47:54,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 20:47:54,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:47:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 20:47:54,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:47:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 20:47:56,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057245546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:47:56,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705566540] [2022-11-20 20:47:56,251 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:47:56,251 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:47:56,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:47:56,252 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:47:56,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:47:56,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:47:56,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21186#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:47:56,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:47:56,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:47:56,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 67 [2022-11-20 20:47:56,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652961622] [2022-11-20 20:47:56,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:47:56,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 20:47:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:47:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 20:47:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=4241, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 20:47:56,616 INFO L87 Difference]: Start difference. First operand 195 states and 217 transitions. Second operand has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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) [2022-11-20 20:49:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:28,517 INFO L93 Difference]: Finished difference Result 733 states and 804 transitions. [2022-11-20 20:49:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-11-20 20:49:28,518 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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 43 [2022-11-20 20:49:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:28,521 INFO L225 Difference]: With dead ends: 733 [2022-11-20 20:49:28,521 INFO L226 Difference]: Without dead ends: 680 [2022-11-20 20:49:28,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8266 ImplicationChecksByTransitivity, 78.7s TimeCoverageRelationStatistics Valid=5340, Invalid=20420, Unknown=0, NotChecked=0, Total=25760 [2022-11-20 20:49:28,523 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 705 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:28,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 85 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2022-11-20 20:49:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-11-20 20:49:28,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 175. [2022-11-20 20:49:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1551724137931034) internal successors, (201), 174 states have internal predecessors, (201), 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) [2022-11-20 20:49:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2022-11-20 20:49:28,848 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 43 [2022-11-20 20:49:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:28,849 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2022-11-20 20:49:28,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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) [2022-11-20 20:49:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2022-11-20 20:49:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:49:28,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:28,850 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:28,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:29,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 20:49:29,052 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:49:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:29,052 INFO L85 PathProgramCache]: Analyzing trace with hash -109889653, now seen corresponding path program 32 times [2022-11-20 20:49:29,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:49:29,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810680269] [2022-11-20 20:49:29,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:29,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:49:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:49:29,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:49:29,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810680269] [2022-11-20 20:49:29,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810680269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:49:29,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39435915] [2022-11-20 20:49:29,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:49:29,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:49:29,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:49:29,794 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:49:29,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 20:49:32,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 20:49:32,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:49:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-20 20:49:32,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:49:32,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:49:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:49:34,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39435915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:49:34,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969281624] [2022-11-20 20:49:34,132 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:49:34,132 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:49:34,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:49:34,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:49:34,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:49:34,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:49:34,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23513#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:49:34,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:49:34,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:49:34,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 68 [2022-11-20 20:49:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522603751] [2022-11-20 20:49:34,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:49:34,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 20:49:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:49:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 20:49:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=4535, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 20:49:34,536 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:47,690 WARN L233 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 72 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:50:14,440 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 71 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:50:18,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:29,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:48,528 INFO L93 Difference]: Finished difference Result 313 states and 360 transitions. [2022-11-20 20:50:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 20:50:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-20 20:50:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:48,530 INFO L225 Difference]: With dead ends: 313 [2022-11-20 20:50:48,530 INFO L226 Difference]: Without dead ends: 218 [2022-11-20 20:50:48,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=885, Invalid=6425, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 20:50:48,531 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 123 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:48,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 72 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2266 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2022-11-20 20:50:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-20 20:50:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 196. [2022-11-20 20:50:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 195 states have internal predecessors, (224), 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) [2022-11-20 20:50:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2022-11-20 20:50:48,884 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 44 [2022-11-20 20:50:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:48,884 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2022-11-20 20:50:48,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2022-11-20 20:50:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 20:50:48,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:48,885 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:48,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:49,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 20:50:49,085 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:49,086 INFO L85 PathProgramCache]: Analyzing trace with hash -860619069, now seen corresponding path program 33 times [2022-11-20 20:50:49,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:49,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930672481] [2022-11-20 20:50:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:49,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:50:49,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:49,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930672481] [2022-11-20 20:50:49,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930672481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:50:49,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317979436] [2022-11-20 20:50:49,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:50:49,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:50:49,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:50:49,762 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:50:49,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 20:50:49,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:50:49,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:50:49,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 20:50:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:50:49,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:50:50,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317979436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290581684] [2022-11-20 20:50:50,019 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:50:50,020 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:50:50,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:50:50,020 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:50:50,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:50:50,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:50:50,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24831#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:50:50,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:50:50,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:50:50,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2022-11-20 20:50:50,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021421250] [2022-11-20 20:50:50,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:50:50,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 20:50:50,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 20:50:50,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:50:50,276 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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) [2022-11-20 20:50:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:51,663 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-11-20 20:50:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 20:50:51,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 45 [2022-11-20 20:50:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:51,666 INFO L225 Difference]: With dead ends: 322 [2022-11-20 20:50:51,666 INFO L226 Difference]: Without dead ends: 305 [2022-11-20 20:50:51,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-20 20:50:51,667 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:51,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 62 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:50:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-20 20:50:52,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 210. [2022-11-20 20:50:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1483253588516746) internal successors, (240), 209 states have internal predecessors, (240), 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) [2022-11-20 20:50:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2022-11-20 20:50:52,061 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 45 [2022-11-20 20:50:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:52,062 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2022-11-20 20:50:52,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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) [2022-11-20 20:50:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2022-11-20 20:50:52,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 20:50:52,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:52,062 INFO L195 NwaCegarLoop]: trace histogram [19, 15, 7, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:52,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:52,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:50:52,263 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash -868692605, now seen corresponding path program 34 times [2022-11-20 20:50:52,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:52,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874808444] [2022-11-20 20:50:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:52,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-20 20:50:53,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:53,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874808444] [2022-11-20 20:50:53,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874808444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:50:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113528181] [2022-11-20 20:50:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:50:53,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:50:53,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:50:53,137 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:50:53,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 20:50:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:53,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 20:50:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-20 20:50:53,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 64 proven. 56 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-20 20:50:54,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113528181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448029161] [2022-11-20 20:50:54,556 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:50:54,556 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:50:54,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:50:54,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:50:54,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:50:54,615 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:50:54,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26217#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:50:54,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:50:54,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:50:54,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 18] total 54 [2022-11-20 20:50:54,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736633728] [2022-11-20 20:50:54,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:50:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 20:50:54,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 20:50:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2982, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 20:50:54,919 INFO L87 Difference]: Start difference. First operand 210 states and 240 transitions. Second operand has 54 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 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) [2022-11-20 20:51:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:49,708 INFO L93 Difference]: Finished difference Result 320 states and 369 transitions. [2022-11-20 20:51:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-11-20 20:51:49,708 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 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 47 [2022-11-20 20:51:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:49,710 INFO L225 Difference]: With dead ends: 320 [2022-11-20 20:51:49,710 INFO L226 Difference]: Without dead ends: 274 [2022-11-20 20:51:49,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6070 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=1824, Invalid=21738, Unknown=0, NotChecked=0, Total=23562 [2022-11-20 20:51:49,712 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 118 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 3357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:49,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 68 Invalid, 3602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 3357 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 20:51:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-20 20:51:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 238. [2022-11-20 20:51:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.130801687763713) internal successors, (268), 237 states have internal predecessors, (268), 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) [2022-11-20 20:51:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2022-11-20 20:51:50,188 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 47 [2022-11-20 20:51:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:50,188 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2022-11-20 20:51:50,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 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) [2022-11-20 20:51:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2022-11-20 20:51:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 20:51:50,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:50,189 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:50,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:50,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 20:51:50,389 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash -356283211, now seen corresponding path program 35 times [2022-11-20 20:51:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:51:50,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211257511] [2022-11-20 20:51:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:50,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:51:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-20 20:51:51,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:51:51,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211257511] [2022-11-20 20:51:51,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211257511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:51:51,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641974081] [2022-11-20 20:51:51,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:51:51,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:51:51,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:51:51,222 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:51:51,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 20:51:52,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 20:51:52,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:51:52,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 20:51:52,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-20 20:51:53,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:51:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-20 20:51:54,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641974081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:51:54,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603907166] [2022-11-20 20:51:54,966 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:51:54,966 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:51:54,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:51:54,966 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:51:54,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:51:55,018 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:51:55,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27864#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:51:55,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:51:55,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:51:55,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 73 [2022-11-20 20:51:55,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353103808] [2022-11-20 20:51:55,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:51:55,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-20 20:51:55,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:51:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-20 20:51:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=5204, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 20:51:55,384 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 73 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 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) [2022-11-20 20:52:16,848 WARN L233 SmtUtils]: Spent 11.91s on a formula simplification. DAG size of input: 77 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:52:30,379 WARN L233 SmtUtils]: Spent 6.44s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:52:55,601 WARN L233 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 76 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:53:10,825 WARN L233 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 71 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:53:13,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:53:25,810 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 66 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:53:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:53:45,745 INFO L93 Difference]: Finished difference Result 339 states and 385 transitions. [2022-11-20 20:53:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 20:53:45,746 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 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 47 [2022-11-20 20:53:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:53:45,747 INFO L225 Difference]: With dead ends: 339 [2022-11-20 20:53:45,747 INFO L226 Difference]: Without dead ends: 266 [2022-11-20 20:53:45,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 103.8s TimeCoverageRelationStatistics Valid=1284, Invalid=9635, Unknown=1, NotChecked=0, Total=10920 [2022-11-20 20:53:45,749 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 73 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:53:45,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 76 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-11-20 20:53:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-20 20:53:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 243. [2022-11-20 20:53:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.1198347107438016) internal successors, (271), 242 states have internal predecessors, (271), 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) [2022-11-20 20:53:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 271 transitions. [2022-11-20 20:53:46,215 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 271 transitions. Word has length 47 [2022-11-20 20:53:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:53:46,216 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 271 transitions. [2022-11-20 20:53:46,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 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) [2022-11-20 20:53:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 271 transitions. [2022-11-20 20:53:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 20:53:46,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:53:46,216 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1] [2022-11-20 20:53:46,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 20:53:46,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 20:53:46,420 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:53:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:53:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash -818530933, now seen corresponding path program 36 times [2022-11-20 20:53:46,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:53:46,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664579689] [2022-11-20 20:53:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:46,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:53:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-20 20:53:47,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:53:47,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664579689] [2022-11-20 20:53:47,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664579689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:53:47,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404502394] [2022-11-20 20:53:47,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:53:47,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:53:47,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:53:47,143 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:53:47,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 20:53:47,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:53:47,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:53:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 20:53:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-20 20:53:47,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:53:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-20 20:53:47,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404502394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1065276302] [2022-11-20 20:53:47,463 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:53:47,463 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:53:47,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:53:47,464 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:53:47,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:53:47,515 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:53:47,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29375#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:53:47,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:53:47,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:53:47,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 19 [2022-11-20 20:53:47,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101781529] [2022-11-20 20:53:47,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:53:47,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 20:53:47,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:53:47,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 20:53:47,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-11-20 20:53:47,711 INFO L87 Difference]: Start difference. First operand 243 states and 271 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 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) [2022-11-20 20:53:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:53:49,394 INFO L93 Difference]: Finished difference Result 362 states and 395 transitions. [2022-11-20 20:53:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:53:49,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 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 48 [2022-11-20 20:53:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:53:49,396 INFO L225 Difference]: With dead ends: 362 [2022-11-20 20:53:49,397 INFO L226 Difference]: Without dead ends: 344 [2022-11-20 20:53:49,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:53:49,397 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:53:49,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:53:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-20 20:53:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2022-11-20 20:53:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.12015503875969) internal successors, (289), 258 states have internal predecessors, (289), 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) [2022-11-20 20:53:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 289 transitions. [2022-11-20 20:53:50,028 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 289 transitions. Word has length 48 [2022-11-20 20:53:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:53:50,029 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 289 transitions. [2022-11-20 20:53:50,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 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) [2022-11-20 20:53:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 289 transitions. [2022-11-20 20:53:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 20:53:50,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:53:50,030 INFO L195 NwaCegarLoop]: trace histogram [20, 13, 11, 1, 1, 1, 1, 1, 1] [2022-11-20 20:53:50,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 20:53:50,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 20:53:50,236 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:53:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:53:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash 65687938, now seen corresponding path program 37 times [2022-11-20 20:53:50,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:53:50,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417233531] [2022-11-20 20:53:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:50,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:53:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:53:51,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:53:51,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417233531] [2022-11-20 20:53:51,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417233531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:53:51,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595689410] [2022-11-20 20:53:51,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:53:51,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:53:51,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:53:51,104 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:53:51,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 20:53:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 20:53:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 20:53:51,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:53:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 24 proven. 132 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-20 20:53:53,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595689410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793054892] [2022-11-20 20:53:53,426 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:53:53,426 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:53:53,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:53:53,426 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:53:53,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:53:53,487 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:53:53,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30971#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:53:53,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:53:53,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:53:53,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 26] total 71 [2022-11-20 20:53:53,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123994871] [2022-11-20 20:53:53,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:53:53,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-20 20:53:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:53:53,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-20 20:53:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=5000, Unknown=0, NotChecked=0, Total=5550 [2022-11-20 20:53:53,893 INFO L87 Difference]: Start difference. First operand 259 states and 289 transitions. Second operand has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 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) [2022-11-20 20:55:29,359 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:55:49,389 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:56:13,619 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:56:42,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:56:53,714 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:57:08,318 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:57:22,663 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:57:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:24,568 INFO L93 Difference]: Finished difference Result 403 states and 481 transitions. [2022-11-20 20:57:24,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-11-20 20:57:24,569 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-20 20:57:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:24,570 INFO L225 Difference]: With dead ends: 403 [2022-11-20 20:57:24,570 INFO L226 Difference]: Without dead ends: 337 [2022-11-20 20:57:24,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15196 ImplicationChecksByTransitivity, 195.3s TimeCoverageRelationStatistics Valid=3533, Invalid=49137, Unknown=0, NotChecked=0, Total=52670 [2022-11-20 20:57:24,574 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 200 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 5588 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 5990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 5588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:57:24,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 154 Invalid, 5990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 5588 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2022-11-20 20:57:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-20 20:57:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 312. [2022-11-20 20:57:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.1157556270096463) internal successors, (347), 311 states have internal predecessors, (347), 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) [2022-11-20 20:57:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 347 transitions. [2022-11-20 20:57:25,220 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 347 transitions. Word has length 50 [2022-11-20 20:57:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:25,220 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 347 transitions. [2022-11-20 20:57:25,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 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) [2022-11-20 20:57:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 347 transitions. [2022-11-20 20:57:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 20:57:25,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:25,224 INFO L195 NwaCegarLoop]: trace histogram [21, 16, 8, 1, 1, 1, 1, 1, 1] [2022-11-20 20:57:25,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 20:57:25,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-20 20:57:25,430 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:25,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash 499981836, now seen corresponding path program 38 times [2022-11-20 20:57:25,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:25,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344749960] [2022-11-20 20:57:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:25,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-20 20:57:26,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:57:26,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344749960] [2022-11-20 20:57:26,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344749960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:57:26,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030391827] [2022-11-20 20:57:26,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:57:26,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:26,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:57:26,344 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:57:26,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff16ac15-095b-49e8-b55c-caf7af805bdf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 20:57:28,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 20:57:28,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:57:28,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 20:57:28,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:57:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-20 20:57:29,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:57:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-20 20:57:31,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030391827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:57:31,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218082317] [2022-11-20 20:57:31,776 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:57:31,776 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:57:31,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:57:31,777 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:57:31,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:57:31,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:57:32,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33086#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:57:32,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:57:32,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:57:32,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 85 [2022-11-20 20:57:32,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114160225] [2022-11-20 20:57:32,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:57:32,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-20 20:57:32,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:32,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-20 20:57:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=6425, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 20:57:32,246 INFO L87 Difference]: Start difference. First operand 312 states and 347 transitions. Second operand has 85 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 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)