./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh --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 58ba472d0eab58f0bee7768d9e5b3bb2a3404d90b32bd7c010fe277536e64fd4 --- 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-2329fc7 [2022-12-14 07:38:51,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:38:51,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:38:51,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:38:51,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:38:51,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:38:51,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:38:51,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:38:51,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:38:51,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:38:51,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:38:51,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:38:51,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:38:51,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:38:51,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:38:51,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:38:51,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:38:51,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:38:51,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:38:51,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:38:51,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:38:51,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:38:51,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:38:51,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:38:51,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:38:51,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:38:51,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:38:51,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:38:51,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:38:51,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:38:51,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:38:51,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:38:51,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:38:51,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:38:51,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:38:51,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:38:51,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:38:51,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:38:51,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:38:51,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:38:51,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:38:51,262 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:38:51,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:38:51,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:38:51,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:38:51,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:38:51,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:38:51,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:38:51,290 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:38:51,290 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:38:51,291 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:38:51,291 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:38:51,291 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:38:51,291 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:38:51,291 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:38:51,291 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:38:51,292 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:38:51,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:38:51,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:38:51,292 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:38:51,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:38:51,293 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:38:51,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:38:51,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:38:51,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:38:51,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:38:51,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:38:51,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:38:51,294 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:38:51,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:38:51,295 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:38:51,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:38:51,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:38:51,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:38:51,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:38:51,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:38:51,296 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:38:51,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:38:51,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:38:51,297 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:38:51,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:38:51,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:38:51,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:38:51,297 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_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58ba472d0eab58f0bee7768d9e5b3bb2a3404d90b32bd7c010fe277536e64fd4 [2022-12-14 07:38:51,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:38:51,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:38:51,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:38:51,479 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:38:51,480 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:38:51,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c [2022-12-14 07:38:54,048 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:38:54,478 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:38:54,478 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c [2022-12-14 07:38:54,510 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/data/d78554b08/457ed3a0587a4c99ac433b5aeb54991a/FLAGb33f7d673 [2022-12-14 07:38:54,637 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/data/d78554b08/457ed3a0587a4c99ac433b5aeb54991a [2022-12-14 07:38:54,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:38:54,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:38:54,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:38:54,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:38:54,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:38:54,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:38:54" (1/1) ... [2022-12-14 07:38:54,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a28df63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:54, skipping insertion in model container [2022-12-14 07:38:54,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:38:54" (1/1) ... [2022-12-14 07:38:54,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:38:54,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:38:56,233 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_4161cef5-5c2e-4b7e-902b-188e3f006987/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[381679,381692] [2022-12-14 07:38:56,252 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_4161cef5-5c2e-4b7e-902b-188e3f006987/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[383339,383352] [2022-12-14 07:38:56,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:38:56,509 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:38:57,306 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_4161cef5-5c2e-4b7e-902b-188e3f006987/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[381679,381692] [2022-12-14 07:38:57,309 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[383339,383352] [2022-12-14 07:38:57,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:38:57,359 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:38:57,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57 WrapperNode [2022-12-14 07:38:57,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:38:57,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:38:57,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:38:57,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:38:57,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,680 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 13146 [2022-12-14 07:38:57,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:38:57,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:38:57,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:38:57,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:38:57,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,937 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:38:57,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:38:57,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:38:57,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:38:57,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:38:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:38:58,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:38:58,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:38:58,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:38:58,034 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 07:38:58,035 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 07:38:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 07:38:58,035 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 07:38:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 07:38:58,035 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 07:38:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 07:38:58,035 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 07:38:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 07:38:58,035 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 07:38:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 07:38:58,035 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 07:38:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 07:38:58,035 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 07:38:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:38:58,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:38:58,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:38:58,135 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:38:58,137 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:39:03,651 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:39:05,098 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:39:05,098 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-14 07:39:05,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:39:05 BoogieIcfgContainer [2022-12-14 07:39:05,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:39:05,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:39:05,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:39:05,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:39:05,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:38:54" (1/3) ... [2022-12-14 07:39:05,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be9e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:39:05, skipping insertion in model container [2022-12-14 07:39:05,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (2/3) ... [2022-12-14 07:39:05,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be9e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:39:05, skipping insertion in model container [2022-12-14 07:39:05,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:39:05" (3/3) ... [2022-12-14 07:39:05,108 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.11.cil-1.c [2022-12-14 07:39:05,122 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:39:05,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 07:39:05,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:39:05,187 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;@41179f5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:39:05,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 07:39:05,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-14 07:39:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 07:39:05,208 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:05,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:05,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash 165429238, now seen corresponding path program 1 times [2022-12-14 07:39:05,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:05,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431060111] [2022-12-14 07:39:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:05,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:39:05,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:05,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431060111] [2022-12-14 07:39:05,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431060111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:05,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:39:05,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:39:05,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651597343] [2022-12-14 07:39:05,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:05,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:39:05,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:39:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:39:05,565 INFO L87 Difference]: Start difference. First operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:39:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:06,319 INFO L93 Difference]: Finished difference Result 3811 states and 7391 transitions. [2022-12-14 07:39:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:39:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2022-12-14 07:39:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:06,335 INFO L225 Difference]: With dead ends: 3811 [2022-12-14 07:39:06,336 INFO L226 Difference]: Without dead ends: 1984 [2022-12-14 07:39:06,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:39:06,344 INFO L413 NwaCegarLoop]: 3488 mSDtfsCounter, 3754 mSDsluCounter, 3392 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3754 SdHoareTripleChecker+Valid, 6880 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:06,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3754 Valid, 6880 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:39:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-12-14 07:39:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2022-12-14 07:39:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1921 states have (on average 1.9229567933368037) internal successors, (3694), 1925 states have internal predecessors, (3694), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-12-14 07:39:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3788 transitions. [2022-12-14 07:39:06,432 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3788 transitions. Word has length 65 [2022-12-14 07:39:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:06,432 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 3788 transitions. [2022-12-14 07:39:06,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:39:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3788 transitions. [2022-12-14 07:39:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 07:39:06,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:06,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:06,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:39:06,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:06,437 INFO L85 PathProgramCache]: Analyzing trace with hash 214517171, now seen corresponding path program 1 times [2022-12-14 07:39:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:06,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130752784] [2022-12-14 07:39:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:06,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:39:06,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130752784] [2022-12-14 07:39:06,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130752784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:39:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527052460] [2022-12-14 07:39:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:06,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:06,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:06,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:06,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:39:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:06,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:39:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 07:39:06,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:06,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527052460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:06,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:39:06,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:39:06,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415752671] [2022-12-14 07:39:06,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:06,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:39:06,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:39:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:06,879 INFO L87 Difference]: Start difference. First operand 1983 states and 3788 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:07,307 INFO L93 Difference]: Finished difference Result 2650 states and 4829 transitions. [2022-12-14 07:39:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:39:07,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 07:39:07,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:07,315 INFO L225 Difference]: With dead ends: 2650 [2022-12-14 07:39:07,316 INFO L226 Difference]: Without dead ends: 2313 [2022-12-14 07:39:07,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:07,318 INFO L413 NwaCegarLoop]: 3340 mSDtfsCounter, 3497 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:07,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 3557 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:39:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-12-14 07:39:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2022-12-14 07:39:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2193 states have (on average 1.8718650250797995) internal successors, (4105), 2198 states have internal predecessors, (4105), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-12-14 07:39:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4279 transitions. [2022-12-14 07:39:07,370 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4279 transitions. Word has length 130 [2022-12-14 07:39:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:07,370 INFO L495 AbstractCegarLoop]: Abstraction has 2307 states and 4279 transitions. [2022-12-14 07:39:07,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4279 transitions. [2022-12-14 07:39:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 07:39:07,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:07,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:07,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:39:07,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 07:39:07,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash -888691919, now seen corresponding path program 1 times [2022-12-14 07:39:07,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:07,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864834471] [2022-12-14 07:39:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:39:07,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:07,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864834471] [2022-12-14 07:39:07,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864834471] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:39:07,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987531869] [2022-12-14 07:39:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:07,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:07,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:07,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:39:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:07,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:39:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 07:39:07,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:07,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987531869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:07,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:39:07,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:39:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192170043] [2022-12-14 07:39:07,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:07,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:39:07,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:39:07,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:07,935 INFO L87 Difference]: Start difference. First operand 2307 states and 4279 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:08,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:08,347 INFO L93 Difference]: Finished difference Result 3616 states and 6318 transitions. [2022-12-14 07:39:08,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:39:08,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 07:39:08,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:08,357 INFO L225 Difference]: With dead ends: 3616 [2022-12-14 07:39:08,357 INFO L226 Difference]: Without dead ends: 2955 [2022-12-14 07:39:08,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:08,361 INFO L413 NwaCegarLoop]: 3339 mSDtfsCounter, 3509 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:08,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:39:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-12-14 07:39:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2947. [2022-12-14 07:39:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2731 states have (on average 1.7997070670084219) internal successors, (4915), 2738 states have internal predecessors, (4915), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-12-14 07:39:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5245 transitions. [2022-12-14 07:39:08,433 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5245 transitions. Word has length 130 [2022-12-14 07:39:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:08,433 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 5245 transitions. [2022-12-14 07:39:08,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5245 transitions. [2022-12-14 07:39:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 07:39:08,438 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:08,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:08,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:39:08,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:08,639 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:08,639 INFO L85 PathProgramCache]: Analyzing trace with hash 438285231, now seen corresponding path program 1 times [2022-12-14 07:39:08,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:08,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711665869] [2022-12-14 07:39:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:08,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:39:08,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711665869] [2022-12-14 07:39:08,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711665869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:39:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025813939] [2022-12-14 07:39:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:08,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:08,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:08,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:39:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:39:08,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 07:39:09,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:09,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025813939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:09,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:39:09,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:39:09,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816956806] [2022-12-14 07:39:09,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:09,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:39:09,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:09,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:39:09,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:09,006 INFO L87 Difference]: Start difference. First operand 2947 states and 5245 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:09,445 INFO L93 Difference]: Finished difference Result 5524 states and 9246 transitions. [2022-12-14 07:39:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:39:09,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 07:39:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:09,459 INFO L225 Difference]: With dead ends: 5524 [2022-12-14 07:39:09,459 INFO L226 Difference]: Without dead ends: 4223 [2022-12-14 07:39:09,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:09,465 INFO L413 NwaCegarLoop]: 3338 mSDtfsCounter, 3515 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3555 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:09,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3555 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:39:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2022-12-14 07:39:09,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4211. [2022-12-14 07:39:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3795 states have (on average 1.7156785243741766) internal successors, (6511), 3806 states have internal predecessors, (6511), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-12-14 07:39:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 7145 transitions. [2022-12-14 07:39:09,619 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 7145 transitions. Word has length 130 [2022-12-14 07:39:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:09,620 INFO L495 AbstractCegarLoop]: Abstraction has 4211 states and 7145 transitions. [2022-12-14 07:39:09,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 7145 transitions. [2022-12-14 07:39:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 07:39:09,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:09,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:09,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:39:09,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:09,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:09,827 INFO L85 PathProgramCache]: Analyzing trace with hash 607972781, now seen corresponding path program 1 times [2022-12-14 07:39:09,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:09,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997676741] [2022-12-14 07:39:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:09,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:39:09,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997676741] [2022-12-14 07:39:09,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997676741] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:39:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462189158] [2022-12-14 07:39:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:09,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:09,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:09,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:09,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:39:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:10,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:39:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:39:10,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:10,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462189158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:10,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:39:10,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:39:10,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729550270] [2022-12-14 07:39:10,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:39:10,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:10,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:39:10,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:10,209 INFO L87 Difference]: Start difference. First operand 4211 states and 7145 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:10,737 INFO L93 Difference]: Finished difference Result 9292 states and 15002 transitions. [2022-12-14 07:39:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:39:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 07:39:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:10,757 INFO L225 Difference]: With dead ends: 9292 [2022-12-14 07:39:10,758 INFO L226 Difference]: Without dead ends: 6727 [2022-12-14 07:39:10,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:10,766 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3503 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:10,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:39:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2022-12-14 07:39:10,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6707. [2022-12-14 07:39:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 5899 states have (on average 1.6367180878114935) internal successors, (9655), 5918 states have internal predecessors, (9655), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-12-14 07:39:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 10881 transitions. [2022-12-14 07:39:10,926 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 10881 transitions. Word has length 130 [2022-12-14 07:39:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:10,926 INFO L495 AbstractCegarLoop]: Abstraction has 6707 states and 10881 transitions. [2022-12-14 07:39:10,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 10881 transitions. [2022-12-14 07:39:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 07:39:10,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:10,934 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:10,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:39:11,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:11,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1758639275, now seen corresponding path program 1 times [2022-12-14 07:39:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:11,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523436187] [2022-12-14 07:39:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:11,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:39:11,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:11,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523436187] [2022-12-14 07:39:11,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523436187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:39:11,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448816102] [2022-12-14 07:39:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:11,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:11,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:11,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:39:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:11,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:39:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 07:39:11,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:11,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448816102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:11,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:39:11,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:39:11,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500230152] [2022-12-14 07:39:11,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:11,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:39:11,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:11,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:39:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:11,411 INFO L87 Difference]: Start difference. First operand 6707 states and 10881 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:11,933 INFO L93 Difference]: Finished difference Result 16732 states and 26314 transitions. [2022-12-14 07:39:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:39:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 07:39:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:11,972 INFO L225 Difference]: With dead ends: 16732 [2022-12-14 07:39:11,972 INFO L226 Difference]: Without dead ends: 11671 [2022-12-14 07:39:11,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:11,986 INFO L413 NwaCegarLoop]: 3336 mSDtfsCounter, 3518 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:11,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3518 Valid, 3553 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:39:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11671 states. [2022-12-14 07:39:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11671 to 11635. [2022-12-14 07:39:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 10059 states have (on average 1.575405109851874) internal successors, (15847), 10094 states have internal predecessors, (15847), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-12-14 07:39:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 18225 transitions. [2022-12-14 07:39:12,265 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 18225 transitions. Word has length 130 [2022-12-14 07:39:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:12,265 INFO L495 AbstractCegarLoop]: Abstraction has 11635 states and 18225 transitions. [2022-12-14 07:39:12,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 18225 transitions. [2022-12-14 07:39:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 07:39:12,279 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:12,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:12,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:39:12,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 07:39:12,480 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:12,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1743933933, now seen corresponding path program 1 times [2022-12-14 07:39:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:12,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548233059] [2022-12-14 07:39:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:12,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:39:12,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:12,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548233059] [2022-12-14 07:39:12,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548233059] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:39:12,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783517537] [2022-12-14 07:39:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:12,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:12,598 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:12,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:39:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:39:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:39:12,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:12,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783517537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:12,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:39:12,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:39:12,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295232385] [2022-12-14 07:39:12,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:12,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:39:12,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:39:12,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:12,828 INFO L87 Difference]: Start difference. First operand 11635 states and 18225 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:13,516 INFO L93 Difference]: Finished difference Result 31420 states and 48538 transitions. [2022-12-14 07:39:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:39:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 07:39:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:13,567 INFO L225 Difference]: With dead ends: 31420 [2022-12-14 07:39:13,567 INFO L226 Difference]: Without dead ends: 21431 [2022-12-14 07:39:13,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:13,592 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3491 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:13,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:39:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21431 states. [2022-12-14 07:39:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21431 to 21363. [2022-12-14 07:39:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21363 states, 18283 states have (on average 1.53361045780233) internal successors, (28039), 18350 states have internal predecessors, (28039), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-12-14 07:39:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21363 states to 21363 states and 32657 transitions. [2022-12-14 07:39:14,145 INFO L78 Accepts]: Start accepts. Automaton has 21363 states and 32657 transitions. Word has length 130 [2022-12-14 07:39:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:14,145 INFO L495 AbstractCegarLoop]: Abstraction has 21363 states and 32657 transitions. [2022-12-14 07:39:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:39:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 21363 states and 32657 transitions. [2022-12-14 07:39:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 07:39:14,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:14,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:14,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:39:14,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:14,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:14,365 INFO L85 PathProgramCache]: Analyzing trace with hash -710138389, now seen corresponding path program 1 times [2022-12-14 07:39:14,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:14,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665858662] [2022-12-14 07:39:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:14,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:39:14,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:14,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665858662] [2022-12-14 07:39:14,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665858662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:14,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:39:14,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:39:14,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496236133] [2022-12-14 07:39:14,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:14,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:39:14,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:14,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:39:14,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:14,857 INFO L87 Difference]: Start difference. First operand 21363 states and 32657 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:39:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:16,519 INFO L93 Difference]: Finished difference Result 55355 states and 83479 transitions. [2022-12-14 07:39:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:39:16,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-12-14 07:39:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:16,625 INFO L225 Difference]: With dead ends: 55355 [2022-12-14 07:39:16,625 INFO L226 Difference]: Without dead ends: 35639 [2022-12-14 07:39:16,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:39:16,667 INFO L413 NwaCegarLoop]: 3328 mSDtfsCounter, 4171 mSDsluCounter, 6622 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4177 SdHoareTripleChecker+Valid, 9950 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:16,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4177 Valid, 9950 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:39:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35639 states. [2022-12-14 07:39:17,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35639 to 30963. [2022-12-14 07:39:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30963 states, 26379 states have (on average 1.5154099852155123) internal successors, (39975), 26478 states have internal predecessors, (39975), 3430 states have call successors, (3430), 1153 states have call predecessors, (3430), 1152 states have return successors, (3428), 3332 states have call predecessors, (3428), 3428 states have call successors, (3428) [2022-12-14 07:39:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30963 states to 30963 states and 46833 transitions. [2022-12-14 07:39:17,676 INFO L78 Accepts]: Start accepts. Automaton has 30963 states and 46833 transitions. Word has length 130 [2022-12-14 07:39:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:17,677 INFO L495 AbstractCegarLoop]: Abstraction has 30963 states and 46833 transitions. [2022-12-14 07:39:17,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:39:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 30963 states and 46833 transitions. [2022-12-14 07:39:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 07:39:17,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:17,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:17,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:39:17,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1962548650, now seen corresponding path program 1 times [2022-12-14 07:39:17,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:17,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219873780] [2022-12-14 07:39:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:17,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:39:17,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:17,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219873780] [2022-12-14 07:39:17,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219873780] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:17,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:39:17,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:39:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11610790] [2022-12-14 07:39:18,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:18,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:39:18,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:39:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:18,001 INFO L87 Difference]: Start difference. First operand 30963 states and 46833 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:39:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:21,111 INFO L93 Difference]: Finished difference Result 99579 states and 149272 transitions. [2022-12-14 07:39:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:39:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-12-14 07:39:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:21,306 INFO L225 Difference]: With dead ends: 99579 [2022-12-14 07:39:21,306 INFO L226 Difference]: Without dead ends: 70263 [2022-12-14 07:39:21,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:39:21,361 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 4172 mSDsluCounter, 9721 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4192 SdHoareTripleChecker+Valid, 13027 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:21,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4192 Valid, 13027 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:39:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70263 states. [2022-12-14 07:39:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70263 to 59123. [2022-12-14 07:39:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59123 states, 50155 states have (on average 1.494387399062905) internal successors, (74951), 50350 states have internal predecessors, (74951), 6662 states have call successors, (6662), 2305 states have call predecessors, (6662), 2304 states have return successors, (6660), 6468 states have call predecessors, (6660), 6660 states have call successors, (6660) [2022-12-14 07:39:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59123 states to 59123 states and 88273 transitions. [2022-12-14 07:39:23,911 INFO L78 Accepts]: Start accepts. Automaton has 59123 states and 88273 transitions. Word has length 131 [2022-12-14 07:39:23,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:23,911 INFO L495 AbstractCegarLoop]: Abstraction has 59123 states and 88273 transitions. [2022-12-14 07:39:23,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:39:23,911 INFO L276 IsEmpty]: Start isEmpty. Operand 59123 states and 88273 transitions. [2022-12-14 07:39:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 07:39:23,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:23,957 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:23,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:39:23,957 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:23,958 INFO L85 PathProgramCache]: Analyzing trace with hash -400366901, now seen corresponding path program 1 times [2022-12-14 07:39:23,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:23,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651936549] [2022-12-14 07:39:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:23,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:39:24,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:24,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651936549] [2022-12-14 07:39:24,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651936549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:24,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:39:24,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:39:24,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698673270] [2022-12-14 07:39:24,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:24,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:39:24,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:24,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:39:24,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:39:24,217 INFO L87 Difference]: Start difference. First operand 59123 states and 88273 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:39:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:30,646 INFO L93 Difference]: Finished difference Result 202619 states and 300632 transitions. [2022-12-14 07:39:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:39:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2022-12-14 07:39:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:31,036 INFO L225 Difference]: With dead ends: 202619 [2022-12-14 07:39:31,036 INFO L226 Difference]: Without dead ends: 145143 [2022-12-14 07:39:31,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:39:31,149 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 4331 mSDsluCounter, 6545 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4351 SdHoareTripleChecker+Valid, 9845 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:31,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4351 Valid, 9845 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:39:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145143 states. [2022-12-14 07:39:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145143 to 114291. [2022-12-14 07:39:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114291 states, 96747 states have (on average 1.4798908493286613) internal successors, (143175), 97134 states have internal predecessors, (143175), 12934 states have call successors, (12934), 4609 states have call predecessors, (12934), 4608 states have return successors, (12932), 12548 states have call predecessors, (12932), 12932 states have call successors, (12932) [2022-12-14 07:39:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114291 states to 114291 states and 169041 transitions. [2022-12-14 07:39:36,908 INFO L78 Accepts]: Start accepts. Automaton has 114291 states and 169041 transitions. Word has length 132 [2022-12-14 07:39:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:36,908 INFO L495 AbstractCegarLoop]: Abstraction has 114291 states and 169041 transitions. [2022-12-14 07:39:36,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:39:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 114291 states and 169041 transitions. [2022-12-14 07:39:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 07:39:37,002 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:37,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:37,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:39:37,002 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:37,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:37,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1167193530, now seen corresponding path program 1 times [2022-12-14 07:39:37,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:37,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742360788] [2022-12-14 07:39:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:37,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:39:37,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:37,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742360788] [2022-12-14 07:39:37,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742360788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:39:37,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666353215] [2022-12-14 07:39:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:37,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:37,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:37,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:37,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:39:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:37,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:39:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 07:39:37,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:37,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666353215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:37,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:39:37,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 07:39:37,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183354073] [2022-12-14 07:39:37,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:37,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:39:37,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:37,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:39:37,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:39:37,343 INFO L87 Difference]: Start difference. First operand 114291 states and 169041 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:39:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:43,758 INFO L93 Difference]: Finished difference Result 201207 states and 301652 transitions. [2022-12-14 07:39:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:39:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 155 [2022-12-14 07:39:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:44,152 INFO L225 Difference]: With dead ends: 201207 [2022-12-14 07:39:44,152 INFO L226 Difference]: Without dead ends: 143347 [2022-12-14 07:39:44,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:39:44,263 INFO L413 NwaCegarLoop]: 3403 mSDtfsCounter, 114 mSDsluCounter, 3293 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6696 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:44,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6696 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:39:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143347 states. [2022-12-14 07:39:49,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143347 to 134963. [2022-12-14 07:39:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134963 states, 116651 states have (on average 1.5181610101927974) internal successors, (177095), 117038 states have internal predecessors, (177095), 13318 states have call successors, (13318), 4993 states have call predecessors, (13318), 4992 states have return successors, (13316), 12932 states have call predecessors, (13316), 13316 states have call successors, (13316) [2022-12-14 07:39:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134963 states to 134963 states and 203729 transitions. [2022-12-14 07:39:50,175 INFO L78 Accepts]: Start accepts. Automaton has 134963 states and 203729 transitions. Word has length 155 [2022-12-14 07:39:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:50,175 INFO L495 AbstractCegarLoop]: Abstraction has 134963 states and 203729 transitions. [2022-12-14 07:39:50,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:39:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 134963 states and 203729 transitions. [2022-12-14 07:39:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 07:39:50,376 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:50,376 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:50,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:39:50,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 07:39:50,579 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:39:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:50,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1706256274, now seen corresponding path program 1 times [2022-12-14 07:39:50,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:39:50,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638619282] [2022-12-14 07:39:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:50,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:39:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:39:50,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:39:50,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638619282] [2022-12-14 07:39:50,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638619282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:39:50,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853268277] [2022-12-14 07:39:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:50,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:50,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:50,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:50,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:39:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:39:51,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 07:39:51,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:51,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853268277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:51,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:39:51,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 07:39:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033713524] [2022-12-14 07:39:51,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:51,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:39:51,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:39:51,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:39:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:39:51,243 INFO L87 Difference]: Start difference. First operand 134963 states and 203729 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 07:40:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:02,032 INFO L93 Difference]: Finished difference Result 399292 states and 608346 transitions. [2022-12-14 07:40:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:40:02,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 202 [2022-12-14 07:40:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:02,740 INFO L225 Difference]: With dead ends: 399292 [2022-12-14 07:40:02,740 INFO L226 Difference]: Without dead ends: 265975 [2022-12-14 07:40:02,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:40:02,965 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3445 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:02,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3526 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:40:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265975 states. [2022-12-14 07:40:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265975 to 264819. [2022-12-14 07:40:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264819 states, 228971 states have (on average 1.5091125076974814) internal successors, (345543), 229742 states have internal predecessors, (345543), 25862 states have call successors, (25862), 9985 states have call predecessors, (25862), 9984 states have return successors, (25860), 25092 states have call predecessors, (25860), 25860 states have call successors, (25860) [2022-12-14 07:40:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264819 states to 264819 states and 397265 transitions. [2022-12-14 07:40:14,997 INFO L78 Accepts]: Start accepts. Automaton has 264819 states and 397265 transitions. Word has length 202 [2022-12-14 07:40:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:14,998 INFO L495 AbstractCegarLoop]: Abstraction has 264819 states and 397265 transitions. [2022-12-14 07:40:14,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 07:40:14,998 INFO L276 IsEmpty]: Start isEmpty. Operand 264819 states and 397265 transitions. [2022-12-14 07:40:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 07:40:15,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:15,468 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:15,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:40:15,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 07:40:15,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2094682087, now seen corresponding path program 1 times [2022-12-14 07:40:15,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:15,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189040849] [2022-12-14 07:40:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:15,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:40:15,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189040849] [2022-12-14 07:40:15,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189040849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:40:15,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094156587] [2022-12-14 07:40:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:15,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:40:15,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:40:15,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:40:15,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:40:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:40:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 07:40:16,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:40:16,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094156587] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:16,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:40:16,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 07:40:16,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085762535] [2022-12-14 07:40:16,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:16,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:40:16,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:40:16,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:40:16,133 INFO L87 Difference]: Start difference. First operand 264819 states and 397265 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 07:40:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:38,309 INFO L93 Difference]: Finished difference Result 786556 states and 1191898 transitions. [2022-12-14 07:40:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:40:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 202 [2022-12-14 07:40:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:39,968 INFO L225 Difference]: With dead ends: 786556 [2022-12-14 07:40:39,968 INFO L226 Difference]: Without dead ends: 523383 [2022-12-14 07:40:40,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:40:40,468 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3445 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:40,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:40:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523383 states. [2022-12-14 07:41:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523383 to 521075. [2022-12-14 07:41:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521075 states, 450923 states have (on average 1.5015046914883472) internal successors, (677063), 452462 states have internal predecessors, (677063), 50182 states have call successors, (50182), 19969 states have call predecessors, (50182), 19968 states have return successors, (50180), 48644 states have call predecessors, (50180), 50180 states have call successors, (50180) [2022-12-14 07:41:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521075 states to 521075 states and 777425 transitions. [2022-12-14 07:41:05,202 INFO L78 Accepts]: Start accepts. Automaton has 521075 states and 777425 transitions. Word has length 202 [2022-12-14 07:41:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:05,203 INFO L495 AbstractCegarLoop]: Abstraction has 521075 states and 777425 transitions. [2022-12-14 07:41:05,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 07:41:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 521075 states and 777425 transitions. [2022-12-14 07:41:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 07:41:06,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:06,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:06,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 07:41:06,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:06,324 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash 334783821, now seen corresponding path program 1 times [2022-12-14 07:41:06,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:06,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094252063] [2022-12-14 07:41:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:06,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:41:06,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:06,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094252063] [2022-12-14 07:41:06,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094252063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:41:06,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10793303] [2022-12-14 07:41:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:06,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:06,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:41:06,710 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:41:06,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:41:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:41:06,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 07:41:06,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:41:06,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10793303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:06,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:41:06,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 07:41:06,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240086622] [2022-12-14 07:41:06,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:06,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:41:06,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:06,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:41:06,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:41:06,951 INFO L87 Difference]: Start difference. First operand 521075 states and 777425 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 07:41:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:51,803 INFO L93 Difference]: Finished difference Result 1550716 states and 2337498 transitions. [2022-12-14 07:41:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:41:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 202 [2022-12-14 07:41:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:55,263 INFO L225 Difference]: With dead ends: 1550716 [2022-12-14 07:41:55,264 INFO L226 Difference]: Without dead ends: 1031287 [2022-12-14 07:41:56,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:41:56,633 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3445 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:56,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:41:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031287 states. [2022-12-14 07:42:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031287 to 1026675. [2022-12-14 07:42:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026675 states, 889451 states have (on average 1.4945747432967078) internal successors, (1329351), 892526 states have internal predecessors, (1329351), 97286 states have call successors, (97286), 39937 states have call predecessors, (97286), 39936 states have return successors, (97284), 94212 states have call predecessors, (97284), 97284 states have call successors, (97284) [2022-12-14 07:42:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026675 states to 1026675 states and 1523921 transitions. [2022-12-14 07:42:51,025 INFO L78 Accepts]: Start accepts. Automaton has 1026675 states and 1523921 transitions. Word has length 202 [2022-12-14 07:42:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:42:51,026 INFO L495 AbstractCegarLoop]: Abstraction has 1026675 states and 1523921 transitions. [2022-12-14 07:42:51,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 07:42:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1026675 states and 1523921 transitions. [2022-12-14 07:42:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-12-14 07:42:53,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:42:53,406 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:42:53,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 07:42:53,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:42:53,607 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:42:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:42:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash -427183237, now seen corresponding path program 1 times [2022-12-14 07:42:53,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:42:53,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332313476] [2022-12-14 07:42:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:42:53,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:42:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:42:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:42:53,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:42:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332313476] [2022-12-14 07:42:53,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332313476] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:42:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977374648] [2022-12-14 07:42:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:42:53,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:42:53,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:42:53,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:42:53,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161cef5-5c2e-4b7e-902b-188e3f006987/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:42:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:42:54,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:42:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:42:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 07:42:54,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:42:54,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977374648] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:42:54,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:42:54,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 07:42:54,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522894887] [2022-12-14 07:42:54,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:42:54,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:42:54,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:42:54,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:42:54,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:42:54,356 INFO L87 Difference]: Start difference. First operand 1026675 states and 1523921 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)