./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a32548a2dc110e6882a396485f8651f4c4262f9c106b055559dda4621561bdb6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 21:27:53,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:27:53,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:27:53,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:27:53,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:27:53,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:27:53,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:27:53,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:27:53,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:27:53,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:27:53,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:27:53,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:27:53,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:27:53,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:27:53,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:27:53,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:27:53,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:27:53,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:27:53,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:27:53,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:27:53,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:27:53,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:27:53,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:27:53,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:27:53,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:27:53,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:27:53,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:27:53,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:27:53,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:27:53,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:27:53,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:27:53,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:27:53,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:27:53,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:27:53,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:27:53,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:27:53,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:27:53,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:27:53,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:27:53,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:27:53,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:27:53,319 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:27:53,340 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:27:53,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:27:53,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:27:53,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:27:53,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:27:53,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:27:53,342 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:27:53,342 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:27:53,342 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:27:53,342 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:27:53,343 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:27:53,343 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:27:53,343 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:27:53,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:27:53,343 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:27:53,344 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:27:53,344 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:27:53,344 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:27:53,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:27:53,345 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:27:53,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:27:53,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:27:53,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:27:53,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:27:53,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:27:53,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:27:53,346 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:27:53,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:27:53,346 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:27:53,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:27:53,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:27:53,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:27:53,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:27:53,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:27:53,348 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:27:53,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:27:53,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:27:53,348 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:27:53,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:27:53,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:27:53,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:27:53,349 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_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a32548a2dc110e6882a396485f8651f4c4262f9c106b055559dda4621561bdb6 [2022-11-20 21:27:53,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:27:53,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:27:53,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:27:53,697 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:27:53,697 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:27:53,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound20.c [2022-11-20 21:27:56,695 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:27:56,976 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:27:56,977 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound20.c [2022-11-20 21:27:56,986 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/data/c6834688e/3ecd10fbea984d5db0249f52cd78443e/FLAG0d2ec2c0a [2022-11-20 21:27:57,008 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/data/c6834688e/3ecd10fbea984d5db0249f52cd78443e [2022-11-20 21:27:57,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:27:57,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:27:57,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:27:57,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:27:57,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:27:57,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad3202a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57, skipping insertion in model container [2022-11-20 21:27:57,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:27:57,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:27:57,197 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound20.c[552,565] [2022-11-20 21:27:57,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:27:57,225 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:27:57,238 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound20.c[552,565] [2022-11-20 21:27:57,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:27:57,258 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:27:57,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57 WrapperNode [2022-11-20 21:27:57,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:27:57,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:27:57,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:27:57,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:27:57,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,293 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-20 21:27:57,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:27:57,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:27:57,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:27:57,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:27:57,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,314 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:27:57,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:27:57,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:27:57,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:27:57,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (1/1) ... [2022-11-20 21:27:57,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:27:57,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:27:57,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:27:57,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:27:57,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:27:57,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 21:27:57,391 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 21:27:57,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:27:57,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:27:57,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:27:57,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 21:27:57,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 21:27:57,455 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:27:57,457 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:27:57,622 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:27:57,648 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:27:57,648 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 21:27:57,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:57 BoogieIcfgContainer [2022-11-20 21:27:57,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:27:57,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:27:57,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:27:57,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:27:57,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:57" (1/3) ... [2022-11-20 21:27:57,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a34b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:57, skipping insertion in model container [2022-11-20 21:27:57,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:57" (2/3) ... [2022-11-20 21:27:57,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a34b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:57, skipping insertion in model container [2022-11-20 21:27:57,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:57" (3/3) ... [2022-11-20 21:27:57,661 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound20.c [2022-11-20 21:27:57,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:27:57,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:27:57,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:27:57,823 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;@1e9bc411, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:27:57,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:27:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 21:27:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 21:27:57,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:57,855 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:27:57,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:27:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash 323657171, now seen corresponding path program 1 times [2022-11-20 21:27:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:27:57,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129615502] [2022-11-20 21:27:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:57,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:27:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:58,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:27:58,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129615502] [2022-11-20 21:27:58,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 21:27:58,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795957423] [2022-11-20 21:27:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:58,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:58,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:27:58,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:27:58,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:27:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:58,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 21:27:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:27:58,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:27:58,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795957423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:27:58,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:27:58,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:27:58,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889134698] [2022-11-20 21:27:58,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:27:58,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 21:27:58,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:27:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 21:27:58,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:27:58,296 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:27:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:27:58,338 INFO L93 Difference]: Finished difference Result 52 states and 86 transitions. [2022-11-20 21:27:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 21:27:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2022-11-20 21:27:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:27:58,348 INFO L225 Difference]: With dead ends: 52 [2022-11-20 21:27:58,349 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 21:27:58,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:27:58,356 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:27:58,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:27:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 21:27:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 21:27:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 21:27:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-11-20 21:27:58,411 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2022-11-20 21:27:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:27:58,413 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-11-20 21:27:58,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:27:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-11-20 21:27:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 21:27:58,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:58,417 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:27:58,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:58,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 21:27:58,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:27:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash -66879480, now seen corresponding path program 1 times [2022-11-20 21:27:58,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:27:58,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350824673] [2022-11-20 21:27:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:27:58,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:27:58,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433587596] [2022-11-20 21:27:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:58,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:58,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:27:58,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:27:58,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:27:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:27:58,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 21:27:59,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:27:59,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:27:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350824673] [2022-11-20 21:27:59,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:27:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433587596] [2022-11-20 21:27:59,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433587596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:27:59,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:27:59,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 21:27:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633919558] [2022-11-20 21:27:59,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:27:59,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:27:59,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:27:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:27:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:27:59,055 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:27:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:27:59,259 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2022-11-20 21:27:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:27:59,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2022-11-20 21:27:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:27:59,261 INFO L225 Difference]: With dead ends: 48 [2022-11-20 21:27:59,261 INFO L226 Difference]: Without dead ends: 46 [2022-11-20 21:27:59,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:27:59,263 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:27:59,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 99 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:27:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-20 21:27:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-11-20 21:27:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 29 states have internal predecessors, (41), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 21:27:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 64 transitions. [2022-11-20 21:27:59,278 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 64 transitions. Word has length 20 [2022-11-20 21:27:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:27:59,279 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 64 transitions. [2022-11-20 21:27:59,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:27:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 64 transitions. [2022-11-20 21:27:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 21:27:59,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:59,280 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:27:59,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:59,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 21:27:59,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:27:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:59,487 INFO L85 PathProgramCache]: Analyzing trace with hash -68547776, now seen corresponding path program 1 times [2022-11-20 21:27:59,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:27:59,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99943448] [2022-11-20 21:27:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:59,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:27:59,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:27:59,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688038465] [2022-11-20 21:27:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:59,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:59,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:27:59,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:27:59,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:27:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:59,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:27:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:27:59,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:27:59,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:27:59,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99943448] [2022-11-20 21:27:59,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:27:59,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688038465] [2022-11-20 21:27:59,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688038465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:27:59,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:27:59,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:27:59,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923365101] [2022-11-20 21:27:59,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:27:59,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:27:59,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:27:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:27:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:27:59,647 INFO L87 Difference]: Start difference. First operand 44 states and 64 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:27:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:27:59,685 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2022-11-20 21:27:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:27:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2022-11-20 21:27:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:27:59,690 INFO L225 Difference]: With dead ends: 54 [2022-11-20 21:27:59,690 INFO L226 Difference]: Without dead ends: 46 [2022-11-20 21:27:59,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:27:59,694 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:27:59,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:27:59,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-20 21:27:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-20 21:27:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 21:27:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 66 transitions. [2022-11-20 21:27:59,721 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 66 transitions. Word has length 20 [2022-11-20 21:27:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:27:59,722 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 66 transitions. [2022-11-20 21:27:59,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:27:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 66 transitions. [2022-11-20 21:27:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 21:27:59,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:59,724 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:27:59,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:59,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 21:27:59,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:27:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash 722288196, now seen corresponding path program 1 times [2022-11-20 21:27:59,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:27:59,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458994637] [2022-11-20 21:27:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:59,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:27:59,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:27:59,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823598091] [2022-11-20 21:27:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:59,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:59,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:27:59,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:27:59,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac7e6e1-88d1-4ac8-a570-05c20baa1267/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process