./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0 --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 a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 --- 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-e04fb08 [2022-11-16 20:36:51,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:36:51,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:36:51,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:36:51,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:36:51,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:36:51,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:36:51,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:36:51,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:36:51,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:36:51,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:36:51,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:36:51,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:36:51,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:36:51,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:36:51,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:36:51,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:36:51,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:36:51,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:36:51,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:36:51,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:36:51,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:36:51,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:36:51,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:36:51,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:36:51,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:36:51,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:36:51,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:36:51,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:36:51,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:36:51,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:36:51,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:36:51,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:36:51,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:36:51,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:36:51,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:36:51,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:36:51,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:36:51,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:36:51,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:36:51,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:36:51,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:36:51,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:36:51,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:36:51,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:36:51,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:36:51,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:36:51,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:36:51,321 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:36:51,321 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:36:51,321 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:36:51,322 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:36:51,323 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:36:51,323 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:36:51,323 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:36:51,324 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:36:51,324 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:36:51,324 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:36:51,324 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:36:51,325 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:36:51,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:36:51,326 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:36:51,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:36:51,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:36:51,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:36:51,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:36:51,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:36:51,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:36:51,329 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:36:51,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:36:51,329 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:36:51,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:36:51,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:36:51,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:36:51,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:36:51,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:36:51,331 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:36:51,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:36:51,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:36:51,332 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:36:51,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:36:51,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:36:51,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:36:51,334 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_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 [2022-11-16 20:36:51,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:36:51,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:36:51,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:36:51,720 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:36:51,721 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:36:51,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2022-11-16 20:36:51,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/data/7a3d36a38/ba62b913aeb44911b9bacebebb9fbaa2/FLAGb83d56d0b [2022-11-16 20:36:52,373 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:36:52,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2022-11-16 20:36:52,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/data/7a3d36a38/ba62b913aeb44911b9bacebebb9fbaa2/FLAGb83d56d0b [2022-11-16 20:36:52,735 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/data/7a3d36a38/ba62b913aeb44911b9bacebebb9fbaa2 [2022-11-16 20:36:52,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:36:52,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:36:52,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:36:52,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:36:52,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:36:52,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:36:52" (1/1) ... [2022-11-16 20:36:52,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1467b993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:52, skipping insertion in model container [2022-11-16 20:36:52,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:36:52" (1/1) ... [2022-11-16 20:36:52,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:36:52,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:36:53,030 WARN L229 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_918d5abc-0f00-4993-984b-3b0bc10b13b6/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2022-11-16 20:36:53,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:36:53,078 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:36:53,095 WARN L229 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_918d5abc-0f00-4993-984b-3b0bc10b13b6/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2022-11-16 20:36:53,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:36:53,138 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:36:53,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53 WrapperNode [2022-11-16 20:36:53,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:36:53,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:36:53,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:36:53,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:36:53,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,189 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-16 20:36:53,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:36:53,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:36:53,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:36:53,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:36:53,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,210 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:36:53,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:36:53,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:36:53,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:36:53,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (1/1) ... [2022-11-16 20:36:53,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:36:53,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:53,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:36:53,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:36:53,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:36:53,313 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 20:36:53,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 20:36:53,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:36:53,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:36:53,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:36:53,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 20:36:53,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 20:36:53,392 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:36:53,394 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:36:53,590 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:36:53,659 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:36:53,659 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 20:36:53,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:36:53 BoogieIcfgContainer [2022-11-16 20:36:53,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:36:53,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:36:53,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:36:53,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:36:53,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:36:52" (1/3) ... [2022-11-16 20:36:53,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7655f086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:36:53, skipping insertion in model container [2022-11-16 20:36:53,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:53" (2/3) ... [2022-11-16 20:36:53,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7655f086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:36:53, skipping insertion in model container [2022-11-16 20:36:53,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:36:53" (3/3) ... [2022-11-16 20:36:53,704 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2022-11-16 20:36:53,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:36:53,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:36:53,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:36:53,790 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;@7fac0a4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:36:53,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:36:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 20:36:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:36:53,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:53,808 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:53,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:53,822 INFO L85 PathProgramCache]: Analyzing trace with hash 763440750, now seen corresponding path program 1 times [2022-11-16 20:36:53,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:53,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144518670] [2022-11-16 20:36:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:36:54,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:54,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144518670] [2022-11-16 20:36:54,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144518670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:54,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:54,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:36:54,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837840525] [2022-11-16 20:36:54,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:54,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:36:54,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:54,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:36:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:36:54,318 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 20:36:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:54,416 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2022-11-16 20:36:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:36:54,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-16 20:36:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:54,427 INFO L225 Difference]: With dead ends: 58 [2022-11-16 20:36:54,427 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 20:36:54,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:36:54,434 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:54,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 108 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:36:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 20:36:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-11-16 20:36:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 20:36:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-11-16 20:36:54,500 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2022-11-16 20:36:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:54,500 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-11-16 20:36:54,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 20:36:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-11-16 20:36:54,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 20:36:54,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:54,504 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:54,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:36:54,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1804559349, now seen corresponding path program 1 times [2022-11-16 20:36:54,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:54,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133027637] [2022-11-16 20:36:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:54,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:36:54,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133027637] [2022-11-16 20:36:54,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133027637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:54,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:54,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:36:54,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740346352] [2022-11-16 20:36:54,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:54,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:36:54,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:54,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:36:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:36:54,687 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:36:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:54,772 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-16 20:36:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:36:54,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2022-11-16 20:36:54,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:54,774 INFO L225 Difference]: With dead ends: 41 [2022-11-16 20:36:54,775 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 20:36:54,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:36:54,777 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:54,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 100 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:36:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 20:36:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-16 20:36:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 20:36:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-16 20:36:54,789 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-11-16 20:36:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:54,790 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-16 20:36:54,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:36:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-16 20:36:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 20:36:54,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:54,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:54,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:36:54,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:54,793 INFO L85 PathProgramCache]: Analyzing trace with hash 496345742, now seen corresponding path program 1 times [2022-11-16 20:36:54,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:54,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454570182] [2022-11-16 20:36:54,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:54,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:54,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:36:54,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986259433] [2022-11-16 20:36:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:54,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:54,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:54,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:36:54,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:36:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:54,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 20:36:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:36:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 20:36:55,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:36:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 20:36:55,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:55,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454570182] [2022-11-16 20:36:55,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:36:55,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986259433] [2022-11-16 20:36:55,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986259433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:36:55,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998183360] [2022-11-16 20:36:55,424 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-16 20:36:55,424 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:36:55,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:36:55,433 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:36:55,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:36:55,960 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-16 20:36:55,980 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 20:36:55,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:36:56,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1998183360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:56,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:36:56,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 7] total 21 [2022-11-16 20:36:56,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850302356] [2022-11-16 20:36:56,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:56,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 20:36:56,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:56,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 20:36:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-16 20:36:56,785 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 11 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 20:36:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:57,243 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-11-16 20:36:57,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:36:57,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 27 [2022-11-16 20:36:57,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:57,245 INFO L225 Difference]: With dead ends: 68 [2022-11-16 20:36:57,246 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 20:36:57,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-16 20:36:57,247 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:57,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 39 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:36:57,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 20:36:57,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-16 20:36:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 20:36:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-11-16 20:36:57,271 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 27 [2022-11-16 20:36:57,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:57,272 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-11-16 20:36:57,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 20:36:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-11-16 20:36:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 20:36:57,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:57,274 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:57,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:36:57,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:57,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:57,480 INFO L85 PathProgramCache]: Analyzing trace with hash -202147981, now seen corresponding path program 1 times [2022-11-16 20:36:57,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:57,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184254196] [2022-11-16 20:36:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:57,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:57,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:36:57,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320566987] [2022-11-16 20:36:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:57,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:57,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:57,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:36:57,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:36:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:57,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 20:36:57,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:36:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:36:57,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:36:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 20:36:58,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184254196] [2022-11-16 20:36:58,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:36:58,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320566987] [2022-11-16 20:36:58,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320566987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:36:58,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122686285] [2022-11-16 20:36:58,102 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-16 20:36:58,103 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:36:58,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:36:58,103 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:36:58,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:00,736 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-16 20:37:00,740 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 20:37:00,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:01,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '917#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:37:01,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:37:01,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:37:01,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2022-11-16 20:37:01,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036121042] [2022-11-16 20:37:01,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:37:01,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:37:01,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:01,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:37:01,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-16 20:37:01,389 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-16 20:37:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:01,805 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2022-11-16 20:37:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:37:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 44 [2022-11-16 20:37:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:01,811 INFO L225 Difference]: With dead ends: 82 [2022-11-16 20:37:01,811 INFO L226 Difference]: Without dead ends: 69 [2022-11-16 20:37:01,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-11-16 20:37:01,813 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:01,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 88 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:37:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-16 20:37:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-16 20:37:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 20:37:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2022-11-16 20:37:01,852 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 44 [2022-11-16 20:37:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:01,853 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2022-11-16 20:37:01,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-16 20:37:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2022-11-16 20:37:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 20:37:01,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:01,855 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:01,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 20:37:02,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:02,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:02,061 INFO L85 PathProgramCache]: Analyzing trace with hash -567180131, now seen corresponding path program 1 times [2022-11-16 20:37:02,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:02,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070584281] [2022-11-16 20:37:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:02,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:02,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:37:02,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384789207] [2022-11-16 20:37:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:02,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:02,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:02,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:02,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:37:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 20:37:02,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 20:37:02,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 20:37:02,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:02,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070584281] [2022-11-16 20:37:02,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:37:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384789207] [2022-11-16 20:37:02,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384789207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179492363] [2022-11-16 20:37:02,858 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 20:37:02,858 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:02,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:02,859 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:02,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:04,859 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-16 20:37:04,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 20:37:04,902 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:05,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1479#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:37:05,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:37:05,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:37:05,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2022-11-16 20:37:05,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957697278] [2022-11-16 20:37:05,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:37:05,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:37:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:37:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:37:05,927 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-16 20:37:06,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:06,304 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-11-16 20:37:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:37:06,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 51 [2022-11-16 20:37:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:06,309 INFO L225 Difference]: With dead ends: 85 [2022-11-16 20:37:06,309 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 20:37:06,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-16 20:37:06,311 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:06,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 124 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:37:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 20:37:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-11-16 20:37:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 20:37:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-11-16 20:37:06,339 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 51 [2022-11-16 20:37:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:06,340 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-11-16 20:37:06,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-16 20:37:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-11-16 20:37:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 20:37:06,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:06,358 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:06,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 20:37:06,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:06,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash 166119996, now seen corresponding path program 1 times [2022-11-16 20:37:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:06,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779068347] [2022-11-16 20:37:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:06,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:06,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:37:06,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909306395] [2022-11-16 20:37:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:06,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:06,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:06,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:37:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:06,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 20:37:06,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 20:37:07,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:46,288 WARN L233 SmtUtils]: Spent 20.32s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:38:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-16 20:38:23,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:38:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779068347] [2022-11-16 20:38:23,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:38:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909306395] [2022-11-16 20:38:23,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909306395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:38:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550097780] [2022-11-16 20:38:23,166 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-16 20:38:23,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:38:23,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:38:23,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:38:23,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:38:27,549 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-16 20:38:27,553 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 20:38:27,555 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:38:36,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2134#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:38:36,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:38:36,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:38:36,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-11-16 20:38:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533604494] [2022-11-16 20:38:36,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:38:36,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 20:38:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:38:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 20:38:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-11-16 20:38:36,853 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-16 20:38:56,435 WARN L233 SmtUtils]: Spent 15.22s on a formula simplification. DAG size of input: 65 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:38:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:38:59,214 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2022-11-16 20:38:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 20:38:59,215 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2022-11-16 20:38:59,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:38:59,216 INFO L225 Difference]: With dead ends: 100 [2022-11-16 20:38:59,217 INFO L226 Difference]: Without dead ends: 98 [2022-11-16 20:38:59,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 20:38:59,226 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:38:59,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 125 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-16 20:38:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-16 20:38:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-11-16 20:38:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 20:38:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2022-11-16 20:38:59,290 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 63 [2022-11-16 20:38:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:38:59,290 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2022-11-16 20:38:59,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-16 20:38:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2022-11-16 20:38:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 20:38:59,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:38:59,295 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:38:59,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:38:59,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:38:59,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:38:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:38:59,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1987386298, now seen corresponding path program 1 times [2022-11-16 20:38:59,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:38:59,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545703932] [2022-11-16 20:38:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:38:59,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:38:59,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:38:59,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65985891] [2022-11-16 20:38:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:38:59,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:38:59,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:38:59,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:38:59,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:38:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:38:59,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 20:38:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:38:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-16 20:38:59,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:39:00,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:39:00,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545703932] [2022-11-16 20:39:00,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:39:00,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65985891] [2022-11-16 20:39:00,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65985891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:39:00,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2014214589] [2022-11-16 20:39:00,390 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-16 20:39:00,390 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:39:00,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:39:00,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:39:00,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:39:03,226 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-16 20:39:03,231 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 20:39:03,232 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:39:04,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2733#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:39:04,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:39:04,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:39:04,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-16 20:39:04,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774529124] [2022-11-16 20:39:04,160 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 20:39:04,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 20:39:04,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:39:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 20:39:04,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-11-16 20:39:04,162 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-16 20:39:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:39:04,667 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-11-16 20:39:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 20:39:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 74 [2022-11-16 20:39:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:39:04,668 INFO L225 Difference]: With dead ends: 102 [2022-11-16 20:39:04,669 INFO L226 Difference]: Without dead ends: 82 [2022-11-16 20:39:04,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 20:39:04,670 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:39:04,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 136 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:39:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-16 20:39:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-16 20:39:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 19 states have call successors, (19), 12 states have call predecessors, (19), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 20:39:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-11-16 20:39:04,703 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 74 [2022-11-16 20:39:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:39:04,703 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-11-16 20:39:04,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-16 20:39:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-11-16 20:39:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-16 20:39:04,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:39:04,705 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:39:04,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:39:04,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 20:39:04,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:39:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:39:04,911 INFO L85 PathProgramCache]: Analyzing trace with hash 152662242, now seen corresponding path program 2 times [2022-11-16 20:39:04,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:39:04,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455974552] [2022-11-16 20:39:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:04,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:39:04,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:39:04,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942574059] [2022-11-16 20:39:04,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:39:04,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:04,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:39:04,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:39:04,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:39:05,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:39:05,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:39:05,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 20:39:05,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:39:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-16 20:39:05,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:39:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-16 20:39:06,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:39:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455974552] [2022-11-16 20:39:06,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:39:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942574059] [2022-11-16 20:39:06,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942574059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:39:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205851213] [2022-11-16 20:39:06,886 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-16 20:39:06,886 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:39:06,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:39:06,887 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:39:06,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:39:09,229 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-16 20:39:09,233 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-16 20:39:09,234 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:39:10,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3548#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:39:10,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:39:10,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:39:10,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2022-11-16 20:39:10,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432812750] [2022-11-16 20:39:10,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:39:10,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:39:10,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:39:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:39:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-11-16 20:39:10,236 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-16 20:39:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:39:14,168 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2022-11-16 20:39:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:39:14,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2022-11-16 20:39:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:39:14,171 INFO L225 Difference]: With dead ends: 108 [2022-11-16 20:39:14,171 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 20:39:14,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:39:14,173 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 53 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:39:14,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 119 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 20:39:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 20:39:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-16 20:39:14,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-16 20:39:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2022-11-16 20:39:14,215 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 85 [2022-11-16 20:39:14,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:39:14,215 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2022-11-16 20:39:14,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-16 20:39:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2022-11-16 20:39:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 20:39:14,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:39:14,217 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:39:14,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 20:39:14,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:14,422 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:39:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:39:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash 339357760, now seen corresponding path program 3 times [2022-11-16 20:39:14,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:39:14,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176985298] [2022-11-16 20:39:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:14,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:39:14,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:39:14,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431346121] [2022-11-16 20:39:14,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:39:14,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:39:14,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:39:14,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918d5abc-0f00-4993-984b-3b0bc10b13b6/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:39:14,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:39:14,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:39:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 20:39:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:39:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 72 proven. 45 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-11-16 20:39:15,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:39:50,923 WARN L233 SmtUtils]: Spent 7.89s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:41:06,627 WARN L233 SmtUtils]: Spent 7.95s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 20:44:53,364 WARN L233 SmtUtils]: Spent 21.70s on a formula simplification. DAG size of input: 6309 DAG size of output: 6247 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)