./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac8e60fb32c268c01bf0cc1d1cd76454411c67e3ab15d16b4eca5e74b982e97f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:27:17,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:27:17,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:27:17,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:27:17,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:27:17,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:27:17,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:27:17,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:27:17,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:27:17,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:27:17,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:27:17,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:27:17,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:27:17,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:27:17,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:27:17,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:27:17,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:27:17,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:27:17,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:27:17,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:27:17,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:27:17,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:27:17,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:27:17,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:27:17,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:27:17,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:27:17,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:27:17,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:27:17,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:27:17,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:27:17,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:27:17,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:27:17,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:27:17,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:27:17,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:27:17,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:27:17,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:27:17,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:27:17,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:27:17,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:27:17,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:27:17,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:27:17,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:27:17,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:27:17,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:27:17,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:27:17,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:27:17,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:27:17,264 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:27:17,264 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:27:17,264 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:27:17,264 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:27:17,265 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:27:17,266 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:27:17,266 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:27:17,266 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:27:17,266 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:27:17,266 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:27:17,266 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:27:17,267 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:27:17,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:27:17,268 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:27:17,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:27:17,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:27:17,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:27:17,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:27:17,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:27:17,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:27:17,269 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:27:17,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:27:17,269 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:27:17,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:27:17,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:27:17,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:27:17,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:27:17,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:27:17,271 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:27:17,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:27:17,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:27:17,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:27:17,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:27:17,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:27:17,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:27:17,272 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_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac8e60fb32c268c01bf0cc1d1cd76454411c67e3ab15d16b4eca5e74b982e97f [2022-11-26 00:27:17,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:27:17,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:27:17,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:27:17,599 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:27:17,600 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:27:17,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2022-11-26 00:27:20,664 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:27:20,947 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:27:20,948 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2022-11-26 00:27:20,957 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/data/0d2e568e1/2b506cfe821a45169f07cf4174e9d9c0/FLAG0cfae3986 [2022-11-26 00:27:20,977 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/data/0d2e568e1/2b506cfe821a45169f07cf4174e9d9c0 [2022-11-26 00:27:20,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:27:20,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:27:20,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:27:20,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:27:20,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:27:20,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:27:20" (1/1) ... [2022-11-26 00:27:20,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab8610e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:20, skipping insertion in model container [2022-11-26 00:27:20,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:27:20" (1/1) ... [2022-11-26 00:27:20,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:27:21,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:27:21,297 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_7b878d48-2125-49bd-849b-d09e986ee68e/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c[14522,14535] [2022-11-26 00:27:21,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:27:21,315 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:27:21,396 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_7b878d48-2125-49bd-849b-d09e986ee68e/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c[14522,14535] [2022-11-26 00:27:21,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:27:21,416 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:27:21,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21 WrapperNode [2022-11-26 00:27:21,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:27:21,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:27:21,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:27:21,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:27:21,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,487 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 474 [2022-11-26 00:27:21,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:27:21,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:27:21,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:27:21,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:27:21,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:27:21,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:27:21,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:27:21,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:27:21,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (1/1) ... [2022-11-26 00:27:21,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:27:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:21,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:27:21,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:27:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-26 00:27:21,613 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-26 00:27:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:27:21,614 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-26 00:27:21,614 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-26 00:27:21,614 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-26 00:27:21,614 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-26 00:27:21,615 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-11-26 00:27:21,615 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-11-26 00:27:21,615 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:27:21,615 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:27:21,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:27:21,616 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-26 00:27:21,616 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-26 00:27:21,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:27:21,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:27:21,617 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-26 00:27:21,617 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-26 00:27:21,774 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:27:21,789 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:27:22,399 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:27:22,685 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:27:22,685 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:27:22,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:27:22 BoogieIcfgContainer [2022-11-26 00:27:22,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:27:22,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:27:22,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:27:22,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:27:22,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:27:20" (1/3) ... [2022-11-26 00:27:22,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3f6662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:27:22, skipping insertion in model container [2022-11-26 00:27:22,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:21" (2/3) ... [2022-11-26 00:27:22,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3f6662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:27:22, skipping insertion in model container [2022-11-26 00:27:22,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:27:22" (3/3) ... [2022-11-26 00:27:22,706 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2022-11-26 00:27:22,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:27:22,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:27:22,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:27:22,787 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;@7d1f34ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:27:22,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:27:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 103 states have (on average 1.5339805825242718) internal successors, (158), 105 states have internal predecessors, (158), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:27:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:27:22,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:22,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:22,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:22,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:22,826 INFO L85 PathProgramCache]: Analyzing trace with hash 854415618, now seen corresponding path program 1 times [2022-11-26 00:27:22,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:22,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826719475] [2022-11-26 00:27:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:22,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:27:23,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:23,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826719475] [2022-11-26 00:27:23,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826719475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:23,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:23,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:27:23,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398466348] [2022-11-26 00:27:23,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:23,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:23,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:23,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:23,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:27:23,482 INFO L87 Difference]: Start difference. First operand has 143 states, 103 states have (on average 1.5339805825242718) internal successors, (158), 105 states have internal predecessors, (158), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:27:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:23,733 INFO L93 Difference]: Finished difference Result 286 states and 467 transitions. [2022-11-26 00:27:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:27:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-26 00:27:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:23,746 INFO L225 Difference]: With dead ends: 286 [2022-11-26 00:27:23,746 INFO L226 Difference]: Without dead ends: 146 [2022-11-26 00:27:23,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:27:23,755 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 5 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:23,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 608 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:27:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-26 00:27:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-26 00:27:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 106 states have (on average 1.5) internal successors, (159), 107 states have internal predecessors, (159), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:27:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 221 transitions. [2022-11-26 00:27:23,812 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 221 transitions. Word has length 19 [2022-11-26 00:27:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:23,813 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 221 transitions. [2022-11-26 00:27:23,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:27:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 221 transitions. [2022-11-26 00:27:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:27:23,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:23,822 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:27:23,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:27:23,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:23,823 INFO L85 PathProgramCache]: Analyzing trace with hash -838724581, now seen corresponding path program 1 times [2022-11-26 00:27:23,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:23,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000809744] [2022-11-26 00:27:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:27:24,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:24,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000809744] [2022-11-26 00:27:24,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000809744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:24,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:24,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:27:24,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020314986] [2022-11-26 00:27:24,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:24,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:24,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:24,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:27:24,260 INFO L87 Difference]: Start difference. First operand 146 states and 221 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:27:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:24,372 INFO L93 Difference]: Finished difference Result 294 states and 445 transitions. [2022-11-26 00:27:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:27:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-26 00:27:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:24,381 INFO L225 Difference]: With dead ends: 294 [2022-11-26 00:27:24,381 INFO L226 Difference]: Without dead ends: 151 [2022-11-26 00:27:24,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:27:24,384 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 6 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:24,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 620 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:27:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-26 00:27:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-26 00:27:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 110 states have (on average 1.481818181818182) internal successors, (163), 111 states have internal predecessors, (163), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:27:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 225 transitions. [2022-11-26 00:27:24,419 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 225 transitions. Word has length 28 [2022-11-26 00:27:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:24,420 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 225 transitions. [2022-11-26 00:27:24,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:27:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 225 transitions. [2022-11-26 00:27:24,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:27:24,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:24,423 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:27:24,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:27:24,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash -205428890, now seen corresponding path program 1 times [2022-11-26 00:27:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:24,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825458814] [2022-11-26 00:27:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:27:24,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825458814] [2022-11-26 00:27:24,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825458814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:24,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:24,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:27:24,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71422931] [2022-11-26 00:27:24,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:24,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:27:24,708 INFO L87 Difference]: Start difference. First operand 151 states and 225 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:27:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:24,810 INFO L93 Difference]: Finished difference Result 304 states and 456 transitions. [2022-11-26 00:27:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:27:24,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2022-11-26 00:27:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:24,815 INFO L225 Difference]: With dead ends: 304 [2022-11-26 00:27:24,816 INFO L226 Difference]: Without dead ends: 156 [2022-11-26 00:27:24,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:27:24,825 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 6 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:24,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 606 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:27:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-26 00:27:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-11-26 00:27:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 114 states have (on average 1.4649122807017543) internal successors, (167), 115 states have internal predecessors, (167), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:27:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 229 transitions. [2022-11-26 00:27:24,853 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 229 transitions. Word has length 36 [2022-11-26 00:27:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:24,854 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 229 transitions. [2022-11-26 00:27:24,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:27:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 229 transitions. [2022-11-26 00:27:24,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 00:27:24,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:24,863 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:27:24,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:27:24,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:24,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1469343282, now seen corresponding path program 1 times [2022-11-26 00:27:24,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:24,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913936512] [2022-11-26 00:27:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:24,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:27:25,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913936512] [2022-11-26 00:27:25,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913936512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:25,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:25,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:27:25,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237200123] [2022-11-26 00:27:25,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:25,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:25,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:27:25,059 INFO L87 Difference]: Start difference. First operand 156 states and 229 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:27:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:25,127 INFO L93 Difference]: Finished difference Result 314 states and 464 transitions. [2022-11-26 00:27:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:27:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-26 00:27:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:25,129 INFO L225 Difference]: With dead ends: 314 [2022-11-26 00:27:25,129 INFO L226 Difference]: Without dead ends: 161 [2022-11-26 00:27:25,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:27:25,131 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 6 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:25,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 606 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:27:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-26 00:27:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-11-26 00:27:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 118 states have (on average 1.4491525423728813) internal successors, (171), 119 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:27:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2022-11-26 00:27:25,144 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 44 [2022-11-26 00:27:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:25,145 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2022-11-26 00:27:25,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:27:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2022-11-26 00:27:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 00:27:25,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:25,146 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:27:25,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:27:25,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:25,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:25,147 INFO L85 PathProgramCache]: Analyzing trace with hash -927116021, now seen corresponding path program 1 times [2022-11-26 00:27:25,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:25,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848177058] [2022-11-26 00:27:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:25,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:27:25,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:25,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848177058] [2022-11-26 00:27:25,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848177058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:25,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:25,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:27:25,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855431050] [2022-11-26 00:27:25,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:25,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:25,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:25,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:27:25,356 INFO L87 Difference]: Start difference. First operand 161 states and 233 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:27:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:25,422 INFO L93 Difference]: Finished difference Result 323 states and 468 transitions. [2022-11-26 00:27:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:27:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-26 00:27:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:25,434 INFO L225 Difference]: With dead ends: 323 [2022-11-26 00:27:25,434 INFO L226 Difference]: Without dead ends: 165 [2022-11-26 00:27:25,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:27:25,439 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 5 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:25,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 615 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:27:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-26 00:27:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-11-26 00:27:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 121 states have (on average 1.43801652892562) internal successors, (174), 122 states have internal predecessors, (174), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:27:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 236 transitions. [2022-11-26 00:27:25,456 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 236 transitions. Word has length 44 [2022-11-26 00:27:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:25,456 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 236 transitions. [2022-11-26 00:27:25,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:27:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 236 transitions. [2022-11-26 00:27:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:27:25,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:25,457 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:27:25,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:27:25,458 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1943909742, now seen corresponding path program 1 times [2022-11-26 00:27:25,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:25,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891355170] [2022-11-26 00:27:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:27:25,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891355170] [2022-11-26 00:27:25,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891355170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:25,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:25,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:27:25,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954962778] [2022-11-26 00:27:25,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:25,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:25,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:25,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:27:25,725 INFO L87 Difference]: Start difference. First operand 165 states and 236 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:27:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:25,803 INFO L93 Difference]: Finished difference Result 333 states and 477 transitions. [2022-11-26 00:27:25,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:27:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2022-11-26 00:27:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:25,805 INFO L225 Difference]: With dead ends: 333 [2022-11-26 00:27:25,805 INFO L226 Difference]: Without dead ends: 171 [2022-11-26 00:27:25,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:27:25,808 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 7 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:25,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 617 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:27:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-26 00:27:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-26 00:27:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 126 states have (on average 1.4206349206349207) internal successors, (179), 127 states have internal predecessors, (179), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:27:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 241 transitions. [2022-11-26 00:27:25,830 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 241 transitions. Word has length 52 [2022-11-26 00:27:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:25,831 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 241 transitions. [2022-11-26 00:27:25,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:27:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 241 transitions. [2022-11-26 00:27:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 00:27:25,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:25,835 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-11-26 00:27:25,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:27:25,835 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1380124131, now seen corresponding path program 1 times [2022-11-26 00:27:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:25,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320397146] [2022-11-26 00:27:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:27:26,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:26,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320397146] [2022-11-26 00:27:26,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320397146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:26,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291723683] [2022-11-26 00:27:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:26,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:26,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:26,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:26,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:27:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:26,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:27:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:26,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:26,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291723683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:26,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:27:26,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-26 00:27:26,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583673365] [2022-11-26 00:27:26,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:26,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:27:26,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:26,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:27:26,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:27:26,872 INFO L87 Difference]: Start difference. First operand 171 states and 241 transitions. Second operand has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:27:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:27,247 INFO L93 Difference]: Finished difference Result 507 states and 707 transitions. [2022-11-26 00:27:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:27:27,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 55 [2022-11-26 00:27:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:27,250 INFO L225 Difference]: With dead ends: 507 [2022-11-26 00:27:27,251 INFO L226 Difference]: Without dead ends: 329 [2022-11-26 00:27:27,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:27:27,252 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 199 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:27,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1215 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:27:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-26 00:27:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2022-11-26 00:27:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 239 states have (on average 1.4100418410041842) internal successors, (337), 241 states have internal predecessors, (337), 60 states have call successors, (60), 26 states have call predecessors, (60), 26 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2022-11-26 00:27:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 457 transitions. [2022-11-26 00:27:27,272 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 457 transitions. Word has length 55 [2022-11-26 00:27:27,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:27,272 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 457 transitions. [2022-11-26 00:27:27,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:27:27,273 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 457 transitions. [2022-11-26 00:27:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:27:27,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:27,274 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:27,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:27,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:27,482 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1873758792, now seen corresponding path program 1 times [2022-11-26 00:27:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:27,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680679567] [2022-11-26 00:27:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:27:27,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:27,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680679567] [2022-11-26 00:27:27,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680679567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:27,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806243021] [2022-11-26 00:27:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:27,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:27,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:27,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:28,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:27:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:28,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:27:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:27:28,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:27:28,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806243021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:28,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1961145116] [2022-11-26 00:27:28,814 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-26 00:27:28,814 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:27:28,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:27:28,825 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:27:28,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:27:31,795 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:27:31,839 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:27:31,873 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-26 00:27:31,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:27:44,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1961145116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:44,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:27:44,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 9] total 35 [2022-11-26 00:27:44,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347114893] [2022-11-26 00:27:44,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:44,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:27:44,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:27:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:27:44,758 INFO L87 Difference]: Start difference. First operand 326 states and 457 transitions. Second operand has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-26 00:27:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:53,017 INFO L93 Difference]: Finished difference Result 738 states and 1042 transitions. [2022-11-26 00:27:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:27:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-11-26 00:27:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:53,031 INFO L225 Difference]: With dead ends: 738 [2022-11-26 00:27:53,032 INFO L226 Difference]: Without dead ends: 415 [2022-11-26 00:27:53,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:27:53,034 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 121 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 2824 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:53,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 2824 Invalid, 1623 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [46 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-26 00:27:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-26 00:27:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 392. [2022-11-26 00:27:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 286 states have (on average 1.3881118881118881) internal successors, (397), 287 states have internal predecessors, (397), 75 states have call successors, (75), 30 states have call predecessors, (75), 30 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-26 00:27:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 547 transitions. [2022-11-26 00:27:53,098 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 547 transitions. Word has length 57 [2022-11-26 00:27:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:53,098 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 547 transitions. [2022-11-26 00:27:53,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-26 00:27:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 547 transitions. [2022-11-26 00:27:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:27:53,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:53,100 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:53,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:53,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:53,312 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1625001576, now seen corresponding path program 1 times [2022-11-26 00:27:53,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:53,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689282908] [2022-11-26 00:27:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:53,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:27:53,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:53,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689282908] [2022-11-26 00:27:53,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689282908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:53,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435180576] [2022-11-26 00:27:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:53,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:53,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:53,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:53,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:27:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:53,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:27:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:27:54,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:27:54,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435180576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:54,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349595632] [2022-11-26 00:27:54,372 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-26 00:27:54,372 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:27:54,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:27:54,373 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:27:54,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:27:57,543 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:27:57,607 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:27:57,668 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:27:57,768 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:28:13,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1349595632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:13,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:13,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [9, 9, 9] total 34 [2022-11-26 00:28:13,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137156957] [2022-11-26 00:28:13,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:13,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:28:13,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:28:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:28:13,204 INFO L87 Difference]: Start difference. First operand 392 states and 547 transitions. Second operand has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:28:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:19,453 INFO L93 Difference]: Finished difference Result 811 states and 1149 transitions. [2022-11-26 00:28:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:28:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 57 [2022-11-26 00:28:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:19,457 INFO L225 Difference]: With dead ends: 811 [2022-11-26 00:28:19,457 INFO L226 Difference]: Without dead ends: 488 [2022-11-26 00:28:19,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:28:19,460 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 139 mSDsluCounter, 2988 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:19,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 3266 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-26 00:28:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-26 00:28:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 456. [2022-11-26 00:28:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 332 states have (on average 1.3734939759036144) internal successors, (456), 333 states have internal predecessors, (456), 90 states have call successors, (90), 33 states have call predecessors, (90), 33 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-26 00:28:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 636 transitions. [2022-11-26 00:28:19,547 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 636 transitions. Word has length 57 [2022-11-26 00:28:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:19,548 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 636 transitions. [2022-11-26 00:28:19,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:28:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 636 transitions. [2022-11-26 00:28:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-26 00:28:19,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:19,550 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:19,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:19,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:28:19,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash 977782157, now seen corresponding path program 1 times [2022-11-26 00:28:19,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:19,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446151170] [2022-11-26 00:28:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:19,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:28:20,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446151170] [2022-11-26 00:28:20,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446151170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477100908] [2022-11-26 00:28:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:20,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:20,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:20,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:28:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:28:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:20,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:28:20,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477100908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:20,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1202934632] [2022-11-26 00:28:20,758 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-26 00:28:20,759 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:20,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:28:20,760 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:28:20,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:28:22,788 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:28:22,824 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:28:22,853 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2022-11-26 00:28:22,893 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:28:37,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1202934632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:37,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:37,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2022-11-26 00:28:37,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159918393] [2022-11-26 00:28:37,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:37,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:28:37,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:37,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:28:37,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:28:37,402 INFO L87 Difference]: Start difference. First operand 456 states and 636 transitions. Second operand has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-26 00:28:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:47,784 INFO L93 Difference]: Finished difference Result 864 states and 1219 transitions. [2022-11-26 00:28:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:28:47,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-11-26 00:28:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:47,792 INFO L225 Difference]: With dead ends: 864 [2022-11-26 00:28:47,792 INFO L226 Difference]: Without dead ends: 541 [2022-11-26 00:28:47,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:28:47,795 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 128 mSDsluCounter, 3878 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 4185 SdHoareTripleChecker+Invalid, 2464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:47,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 4185 Invalid, 2464 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-26 00:28:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-11-26 00:28:47,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 492. [2022-11-26 00:28:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 358 states have (on average 1.3575418994413408) internal successors, (486), 359 states have internal predecessors, (486), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-26 00:28:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 680 transitions. [2022-11-26 00:28:47,899 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 680 transitions. Word has length 59 [2022-11-26 00:28:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:47,900 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 680 transitions. [2022-11-26 00:28:47,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-26 00:28:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 680 transitions. [2022-11-26 00:28:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-26 00:28:47,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:47,902 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:47,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:48,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:28:48,108 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:48,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1166846890, now seen corresponding path program 1 times [2022-11-26 00:28:48,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:48,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082359858] [2022-11-26 00:28:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:48,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:28:48,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:48,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082359858] [2022-11-26 00:28:48,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082359858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:48,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:48,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:28:48,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826276631] [2022-11-26 00:28:48,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:48,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:28:48,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:48,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:28:48,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:28:48,231 INFO L87 Difference]: Start difference. First operand 492 states and 680 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-26 00:28:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:48,372 INFO L93 Difference]: Finished difference Result 891 states and 1253 transitions. [2022-11-26 00:28:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:28:48,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 61 [2022-11-26 00:28:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:48,376 INFO L225 Difference]: With dead ends: 891 [2022-11-26 00:28:48,376 INFO L226 Difference]: Without dead ends: 500 [2022-11-26 00:28:48,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:28:48,378 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 5 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:48,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 615 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:28:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-26 00:28:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2022-11-26 00:28:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 364 states have (on average 1.3516483516483517) internal successors, (492), 365 states have internal predecessors, (492), 97 states have call successors, (97), 38 states have call predecessors, (97), 38 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-26 00:28:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 686 transitions. [2022-11-26 00:28:48,482 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 686 transitions. Word has length 61 [2022-11-26 00:28:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:48,482 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 686 transitions. [2022-11-26 00:28:48,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-26 00:28:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 686 transitions. [2022-11-26 00:28:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-26 00:28:48,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:48,492 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:48,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:28:48,492 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash 342165880, now seen corresponding path program 1 times [2022-11-26 00:28:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:48,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720723004] [2022-11-26 00:28:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:48,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:28:48,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720723004] [2022-11-26 00:28:48,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720723004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:48,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786126528] [2022-11-26 00:28:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:48,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:48,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:48,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:48,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:28:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:49,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:28:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:49,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:28:49,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786126528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:49,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562529769] [2022-11-26 00:28:49,460 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2022-11-26 00:28:49,460 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:49,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:28:49,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:28:49,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:28:53,129 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-11-26 00:28:53,397 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:28:53,416 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 192 for LOIs [2022-11-26 00:28:53,612 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-11-26 00:28:53,657 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-26 00:28:53,713 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:28:53,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:29:37,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13497#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:29:37,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:29:37,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:29:37,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-26 00:29:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697924740] [2022-11-26 00:29:37,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:37,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:29:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:37,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:29:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2503, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:29:37,677 INFO L87 Difference]: Start difference. First operand 500 states and 686 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:29:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:38,326 INFO L93 Difference]: Finished difference Result 1217 states and 1695 transitions. [2022-11-26 00:29:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:29:38,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 65 [2022-11-26 00:29:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:38,332 INFO L225 Difference]: With dead ends: 1217 [2022-11-26 00:29:38,333 INFO L226 Difference]: Without dead ends: 834 [2022-11-26 00:29:38,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=277, Invalid=3029, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:29:38,336 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 293 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:38,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 2229 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:29:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-11-26 00:29:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 528. [2022-11-26 00:29:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 385 states have (on average 1.316883116883117) internal successors, (507), 388 states have internal predecessors, (507), 95 states have call successors, (95), 47 states have call predecessors, (95), 47 states have return successors, (95), 92 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-26 00:29:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 697 transitions. [2022-11-26 00:29:38,462 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 697 transitions. Word has length 65 [2022-11-26 00:29:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:38,464 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 697 transitions. [2022-11-26 00:29:38,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:29:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 697 transitions. [2022-11-26 00:29:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:29:38,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:38,472 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:38,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:38,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:29:38,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash 343853733, now seen corresponding path program 1 times [2022-11-26 00:29:38,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:38,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909782780] [2022-11-26 00:29:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:38,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:29:39,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:39,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909782780] [2022-11-26 00:29:39,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909782780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:39,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:39,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:29:39,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145121202] [2022-11-26 00:29:39,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:39,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:29:39,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:29:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:29:39,076 INFO L87 Difference]: Start difference. First operand 528 states and 697 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:29:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:39,823 INFO L93 Difference]: Finished difference Result 1162 states and 1606 transitions. [2022-11-26 00:29:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:29:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-11-26 00:29:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:39,828 INFO L225 Difference]: With dead ends: 1162 [2022-11-26 00:29:39,828 INFO L226 Difference]: Without dead ends: 857 [2022-11-26 00:29:39,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:29:39,830 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 523 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:39,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1799 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:29:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-26 00:29:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 656. [2022-11-26 00:29:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 476 states have (on average 1.3130252100840336) internal successors, (625), 479 states have internal predecessors, (625), 119 states have call successors, (119), 60 states have call predecessors, (119), 60 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-26 00:29:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 863 transitions. [2022-11-26 00:29:39,965 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 863 transitions. Word has length 66 [2022-11-26 00:29:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:39,965 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 863 transitions. [2022-11-26 00:29:39,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:29:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 863 transitions. [2022-11-26 00:29:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:29:39,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:39,967 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:39,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:29:39,967 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 394513338, now seen corresponding path program 1 times [2022-11-26 00:29:39,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:39,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332804218] [2022-11-26 00:29:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:29:40,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:40,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332804218] [2022-11-26 00:29:40,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332804218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:40,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:40,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:29:40,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917065876] [2022-11-26 00:29:40,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:40,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:29:40,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:29:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:29:40,231 INFO L87 Difference]: Start difference. First operand 656 states and 863 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:29:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:41,094 INFO L93 Difference]: Finished difference Result 1519 states and 2096 transitions. [2022-11-26 00:29:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:29:41,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2022-11-26 00:29:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:41,101 INFO L225 Difference]: With dead ends: 1519 [2022-11-26 00:29:41,102 INFO L226 Difference]: Without dead ends: 1190 [2022-11-26 00:29:41,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:29:41,104 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 699 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:41,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 1926 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:29:41,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-26 00:29:41,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 917. [2022-11-26 00:29:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 662 states have (on average 1.3217522658610272) internal successors, (875), 667 states have internal predecessors, (875), 169 states have call successors, (169), 85 states have call predecessors, (169), 85 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2022-11-26 00:29:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1213 transitions. [2022-11-26 00:29:41,296 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1213 transitions. Word has length 68 [2022-11-26 00:29:41,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:41,296 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1213 transitions. [2022-11-26 00:29:41,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:29:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1213 transitions. [2022-11-26 00:29:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:29:41,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:41,298 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:41,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:29:41,299 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:41,299 INFO L85 PathProgramCache]: Analyzing trace with hash -749852774, now seen corresponding path program 1 times [2022-11-26 00:29:41,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:41,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229176371] [2022-11-26 00:29:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:41,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:29:41,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:41,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229176371] [2022-11-26 00:29:41,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229176371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601366165] [2022-11-26 00:29:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:41,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:41,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:41,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:41,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:29:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:41,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:29:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:29:41,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:29:42,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601366165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585485553] [2022-11-26 00:29:42,067 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-26 00:29:42,068 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:42,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:29:42,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:29:42,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:29:45,739 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:29:45,775 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:29:45,801 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-26 00:29:45,881 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:29:45,930 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:13,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1585485553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:13,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:13,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [8, 9, 9] total 45 [2022-11-26 00:30:13,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107062144] [2022-11-26 00:30:13,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:13,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:30:13,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:13,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:30:13,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:30:13,865 INFO L87 Difference]: Start difference. First operand 917 states and 1213 transitions. Second operand has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-26 00:30:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:20,560 INFO L93 Difference]: Finished difference Result 1484 states and 1980 transitions. [2022-11-26 00:30:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-26 00:30:20,560 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 72 [2022-11-26 00:30:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:20,565 INFO L225 Difference]: With dead ends: 1484 [2022-11-26 00:30:20,565 INFO L226 Difference]: Without dead ends: 903 [2022-11-26 00:30:20,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 170 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:30:20,568 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 101 mSDsluCounter, 2281 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2477 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:20,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2477 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-26 00:30:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-26 00:30:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 903. [2022-11-26 00:30:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 652 states have (on average 1.3205521472392638) internal successors, (861), 657 states have internal predecessors, (861), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-26 00:30:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1193 transitions. [2022-11-26 00:30:20,729 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1193 transitions. Word has length 72 [2022-11-26 00:30:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:20,729 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1193 transitions. [2022-11-26 00:30:20,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-26 00:30:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1193 transitions. [2022-11-26 00:30:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:30:20,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:20,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:20,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:20,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:30:20,938 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash -707977350, now seen corresponding path program 1 times [2022-11-26 00:30:20,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:20,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262316398] [2022-11-26 00:30:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:20,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:30:21,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:21,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262316398] [2022-11-26 00:30:21,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262316398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:21,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545042933] [2022-11-26 00:30:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:21,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:21,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:21,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:30:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:30:21,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:30:21,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:30:21,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545042933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:21,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:30:21,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-26 00:30:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789877426] [2022-11-26 00:30:21,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:21,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:30:21,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:21,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:30:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:30:21,613 INFO L87 Difference]: Start difference. First operand 903 states and 1193 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:30:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:22,303 INFO L93 Difference]: Finished difference Result 1763 states and 2395 transitions. [2022-11-26 00:30:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:30:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 72 [2022-11-26 00:30:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:22,309 INFO L225 Difference]: With dead ends: 1763 [2022-11-26 00:30:22,309 INFO L226 Difference]: Without dead ends: 1065 [2022-11-26 00:30:22,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:30:22,312 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 489 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:22,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 1619 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:30:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-11-26 00:30:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 903. [2022-11-26 00:30:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 652 states have (on average 1.3144171779141105) internal successors, (857), 657 states have internal predecessors, (857), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-26 00:30:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1189 transitions. [2022-11-26 00:30:22,493 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1189 transitions. Word has length 72 [2022-11-26 00:30:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:22,493 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1189 transitions. [2022-11-26 00:30:22,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:30:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1189 transitions. [2022-11-26 00:30:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:30:22,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:22,495 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:22,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:22,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:22,701 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash -174973260, now seen corresponding path program 1 times [2022-11-26 00:30:22,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:22,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252876502] [2022-11-26 00:30:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:22,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:30:22,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:22,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252876502] [2022-11-26 00:30:22,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252876502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:22,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:30:22,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:30:22,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892818376] [2022-11-26 00:30:22,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:22,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:30:22,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:30:22,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:30:22,921 INFO L87 Difference]: Start difference. First operand 903 states and 1189 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:30:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:23,218 INFO L93 Difference]: Finished difference Result 1190 states and 1639 transitions. [2022-11-26 00:30:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:30:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 75 [2022-11-26 00:30:23,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:23,224 INFO L225 Difference]: With dead ends: 1190 [2022-11-26 00:30:23,225 INFO L226 Difference]: Without dead ends: 1188 [2022-11-26 00:30:23,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:30:23,226 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 151 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:23,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1484 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:30:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-11-26 00:30:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 911. [2022-11-26 00:30:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 656 states have (on average 1.3125) internal successors, (861), 663 states have internal predecessors, (861), 168 states have call successors, (168), 86 states have call predecessors, (168), 86 states have return successors, (168), 161 states have call predecessors, (168), 168 states have call successors, (168) [2022-11-26 00:30:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1197 transitions. [2022-11-26 00:30:23,415 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1197 transitions. Word has length 75 [2022-11-26 00:30:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:23,416 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1197 transitions. [2022-11-26 00:30:23,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:30:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1197 transitions. [2022-11-26 00:30:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 00:30:23,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:23,419 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:23,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:30:23,419 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:23,420 INFO L85 PathProgramCache]: Analyzing trace with hash -946574807, now seen corresponding path program 1 times [2022-11-26 00:30:23,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:23,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663755322] [2022-11-26 00:30:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:23,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:30:23,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663755322] [2022-11-26 00:30:23,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663755322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:23,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:30:23,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:30:23,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76306483] [2022-11-26 00:30:23,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:23,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:30:23,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:30:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:30:23,611 INFO L87 Difference]: Start difference. First operand 911 states and 1197 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:30:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:23,851 INFO L93 Difference]: Finished difference Result 1575 states and 2081 transitions. [2022-11-26 00:30:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:30:23,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 78 [2022-11-26 00:30:23,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:23,856 INFO L225 Difference]: With dead ends: 1575 [2022-11-26 00:30:23,856 INFO L226 Difference]: Without dead ends: 899 [2022-11-26 00:30:23,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:30:23,859 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 7 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:23,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 607 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:30:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-11-26 00:30:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2022-11-26 00:30:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 650 states have (on average 1.2876923076923077) internal successors, (837), 657 states have internal predecessors, (837), 162 states have call successors, (162), 86 states have call predecessors, (162), 86 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-11-26 00:30:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1161 transitions. [2022-11-26 00:30:24,042 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1161 transitions. Word has length 78 [2022-11-26 00:30:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:24,043 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1161 transitions. [2022-11-26 00:30:24,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:30:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1161 transitions. [2022-11-26 00:30:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:30:24,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:24,045 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:24,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:30:24,045 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:24,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2135599840, now seen corresponding path program 1 times [2022-11-26 00:30:24,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:24,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262354402] [2022-11-26 00:30:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:24,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:30:24,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:24,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262354402] [2022-11-26 00:30:24,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262354402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:24,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644423354] [2022-11-26 00:30:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:24,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:24,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:24,463 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:24,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:30:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:24,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:30:24,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:30:24,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:30:25,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644423354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240259041] [2022-11-26 00:30:25,126 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-26 00:30:25,126 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:25,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:30:25,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:30:25,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:30:28,605 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 217 for LOIs [2022-11-26 00:30:28,787 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:30:28,804 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 121 for LOIs [2022-11-26 00:30:28,895 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 105 for LOIs [2022-11-26 00:30:28,918 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 101 for LOIs [2022-11-26 00:30:28,948 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-26 00:30:28,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:07,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35403#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (<= 0 ~manual_selection_History_2~0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (<= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= ~manual_selection_History_2~0 0) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:31:07,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:31:07,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:31:07,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-26 00:31:07,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158194918] [2022-11-26 00:31:07,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:07,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:31:07,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:07,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:31:07,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:31:07,322 INFO L87 Difference]: Start difference. First operand 899 states and 1161 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-26 00:31:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:08,200 INFO L93 Difference]: Finished difference Result 1906 states and 2539 transitions. [2022-11-26 00:31:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:31:08,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 80 [2022-11-26 00:31:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:08,206 INFO L225 Difference]: With dead ends: 1906 [2022-11-26 00:31:08,206 INFO L226 Difference]: Without dead ends: 1167 [2022-11-26 00:31:08,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=363, Invalid=3797, Unknown=0, NotChecked=0, Total=4160 [2022-11-26 00:31:08,210 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 234 mSDsluCounter, 2523 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:08,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 2842 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:31:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-11-26 00:31:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 878. [2022-11-26 00:31:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 635 states have (on average 1.2803149606299213) internal successors, (813), 642 states have internal predecessors, (813), 156 states have call successors, (156), 86 states have call predecessors, (156), 86 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-26 00:31:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1125 transitions. [2022-11-26 00:31:08,403 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1125 transitions. Word has length 80 [2022-11-26 00:31:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:08,404 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1125 transitions. [2022-11-26 00:31:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-26 00:31:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1125 transitions. [2022-11-26 00:31:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:31:08,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:08,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:08,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:08,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:08,612 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:08,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1932175146, now seen corresponding path program 1 times [2022-11-26 00:31:08,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:08,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852662463] [2022-11-26 00:31:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:08,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:31:08,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:08,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852662463] [2022-11-26 00:31:08,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852662463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538946629] [2022-11-26 00:31:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:08,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:08,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:08,968 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:08,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:31:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:09,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:31:09,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:31:09,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:31:09,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538946629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728560085] [2022-11-26 00:31:09,373 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-26 00:31:09,373 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:09,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:09,374 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:09,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:12,119 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:31:12,157 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:31:12,186 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 94 for LOIs [2022-11-26 00:31:12,270 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 100 for LOIs [2022-11-26 00:31:12,296 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-26 00:31:12,331 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:40,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1728560085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:31:40,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:31:40,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-26 00:31:40,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826893548] [2022-11-26 00:31:40,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:31:40,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:31:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:31:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2497, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:31:40,479 INFO L87 Difference]: Start difference. First operand 878 states and 1125 transitions. Second operand has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-26 00:32:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:09,214 INFO L93 Difference]: Finished difference Result 1485 states and 1933 transitions. [2022-11-26 00:32:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:32:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 80 [2022-11-26 00:32:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:09,218 INFO L225 Difference]: With dead ends: 1485 [2022-11-26 00:32:09,219 INFO L226 Difference]: Without dead ends: 913 [2022-11-26 00:32:09,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 00:32:09,221 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 147 mSDsluCounter, 5221 mSDsCounter, 0 mSdLazyCounter, 4181 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 5493 SdHoareTripleChecker+Invalid, 4264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:32:09,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 5493 Invalid, 4264 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [83 Valid, 4181 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-26 00:32:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-26 00:32:09,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 881. [2022-11-26 00:32:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 637 states have (on average 1.2794348508634223) internal successors, (815), 644 states have internal predecessors, (815), 157 states have call successors, (157), 86 states have call predecessors, (157), 86 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-26 00:32:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1129 transitions. [2022-11-26 00:32:09,406 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1129 transitions. Word has length 80 [2022-11-26 00:32:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:09,406 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1129 transitions. [2022-11-26 00:32:09,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-26 00:32:09,407 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1129 transitions. [2022-11-26 00:32:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 00:32:09,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:09,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:32:09,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:32:09,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:09,609 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:32:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:09,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2111162779, now seen corresponding path program 1 times [2022-11-26 00:32:09,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:32:09,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469239055] [2022-11-26 00:32:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:09,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:32:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:32:09,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:09,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469239055] [2022-11-26 00:32:09,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469239055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:32:09,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271133948] [2022-11-26 00:32:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:09,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:09,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:09,945 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:09,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:32:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:32:10,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:32:10,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:32:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:32:10,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271133948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:32:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61064602] [2022-11-26 00:32:10,337 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-26 00:32:10,337 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:32:10,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:32:10,338 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:32:10,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:32:14,134 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:32:14,156 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:32:14,176 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-26 00:32:14,279 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-26 00:32:14,329 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:32:14,382 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:32:54,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [61064602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:32:54,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:32:54,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-26 00:32:54,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50742153] [2022-11-26 00:32:54,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:32:54,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:32:54,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:32:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2513, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:32:54,427 INFO L87 Difference]: Start difference. First operand 881 states and 1129 transitions. Second operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:33:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:03,418 INFO L93 Difference]: Finished difference Result 1488 states and 1937 transitions. [2022-11-26 00:33:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:33:03,419 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 82 [2022-11-26 00:33:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:03,423 INFO L225 Difference]: With dead ends: 1488 [2022-11-26 00:33:03,423 INFO L226 Difference]: Without dead ends: 916 [2022-11-26 00:33:03,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 193 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=251, Invalid=2611, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:33:03,425 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 263 mSDsluCounter, 4029 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 4332 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:03,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 4332 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3047 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-26 00:33:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-11-26 00:33:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 884. [2022-11-26 00:33:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 639 states have (on average 1.2785602503912363) internal successors, (817), 646 states have internal predecessors, (817), 158 states have call successors, (158), 86 states have call predecessors, (158), 86 states have return successors, (158), 151 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-26 00:33:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1133 transitions. [2022-11-26 00:33:03,650 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1133 transitions. Word has length 82 [2022-11-26 00:33:03,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:03,651 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1133 transitions. [2022-11-26 00:33:03,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:33:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1133 transitions. [2022-11-26 00:33:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:33:03,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:03,653 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:03,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:03,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:03,868 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash 439863527, now seen corresponding path program 1 times [2022-11-26 00:33:03,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:03,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925374912] [2022-11-26 00:33:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:03,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 00:33:04,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:04,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925374912] [2022-11-26 00:33:04,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925374912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:33:04,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:33:04,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:33:04,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712633801] [2022-11-26 00:33:04,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:33:04,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:33:04,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:04,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:33:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:33:04,046 INFO L87 Difference]: Start difference. First operand 884 states and 1133 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-26 00:33:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:04,294 INFO L93 Difference]: Finished difference Result 1509 states and 1951 transitions. [2022-11-26 00:33:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:33:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 87 [2022-11-26 00:33:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:04,299 INFO L225 Difference]: With dead ends: 1509 [2022-11-26 00:33:04,299 INFO L226 Difference]: Without dead ends: 872 [2022-11-26 00:33:04,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:33:04,304 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 7 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:04,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 589 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:33:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-26 00:33:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2022-11-26 00:33:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 633 states have (on average 1.2527646129541865) internal successors, (793), 640 states have internal predecessors, (793), 152 states have call successors, (152), 86 states have call predecessors, (152), 86 states have return successors, (152), 145 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-26 00:33:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1097 transitions. [2022-11-26 00:33:04,525 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1097 transitions. Word has length 87 [2022-11-26 00:33:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:04,525 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1097 transitions. [2022-11-26 00:33:04,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-26 00:33:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1097 transitions. [2022-11-26 00:33:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:33:04,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:04,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:04,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:33:04,528 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:04,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1129915157, now seen corresponding path program 1 times [2022-11-26 00:33:04,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:04,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072932283] [2022-11-26 00:33:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:33:04,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:04,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072932283] [2022-11-26 00:33:04,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072932283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:33:04,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447636834] [2022-11-26 00:33:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:04,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:04,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:04,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:04,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:33:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:05,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:33:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:33:05,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:33:05,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447636834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:05,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805529015] [2022-11-26 00:33:05,269 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-26 00:33:05,270 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:05,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:05,270 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:05,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:08,759 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:33:08,785 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:33:08,803 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-26 00:33:08,903 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-11-26 00:33:09,396 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:33:09,461 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:54,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1805529015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:33:54,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:33:54,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [8, 9, 9] total 54 [2022-11-26 00:33:54,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173214703] [2022-11-26 00:33:54,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:33:54,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-26 00:33:54,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-26 00:33:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2588, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:33:54,140 INFO L87 Difference]: Start difference. First operand 872 states and 1097 transitions. Second operand has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:34:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:03,570 INFO L93 Difference]: Finished difference Result 1458 states and 1860 transitions. [2022-11-26 00:34:03,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:34:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 87 [2022-11-26 00:34:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:03,574 INFO L225 Difference]: With dead ends: 1458 [2022-11-26 00:34:03,574 INFO L226 Difference]: Without dead ends: 894 [2022-11-26 00:34:03,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 208 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=282, Invalid=2688, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:34:03,576 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 110 mSDsluCounter, 3724 mSDsCounter, 0 mSdLazyCounter, 3158 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 3983 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:03,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 3983 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3158 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-26 00:34:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-26 00:34:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 859. [2022-11-26 00:34:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 624 states have (on average 1.25) internal successors, (780), 631 states have internal predecessors, (780), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-26 00:34:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1076 transitions. [2022-11-26 00:34:03,793 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1076 transitions. Word has length 87 [2022-11-26 00:34:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:03,793 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1076 transitions. [2022-11-26 00:34:03,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:34:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1076 transitions. [2022-11-26 00:34:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-26 00:34:03,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:03,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:03,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-26 00:34:04,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 00:34:04,001 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1505609040, now seen corresponding path program 1 times [2022-11-26 00:34:04,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:04,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067160893] [2022-11-26 00:34:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:04,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:34:04,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:04,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067160893] [2022-11-26 00:34:04,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067160893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:04,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090030446] [2022-11-26 00:34:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:04,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:04,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:04,319 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:04,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:34:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:34:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:34:04,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:34:04,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090030446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:04,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [624302951] [2022-11-26 00:34:04,751 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-26 00:34:04,751 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:04,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:04,752 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:04,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:08,075 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:34:08,098 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:34:08,119 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-11-26 00:34:08,532 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-11-26 00:34:08,899 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:34:08,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:54,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [624302951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:54,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:54,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [8, 9, 9] total 54 [2022-11-26 00:34:54,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160947921] [2022-11-26 00:34:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:54,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-26 00:34:54,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-26 00:34:54,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2618, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:34:54,125 INFO L87 Difference]: Start difference. First operand 859 states and 1076 transitions. Second operand has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 00:35:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:05,109 INFO L93 Difference]: Finished difference Result 1458 states and 1860 transitions. [2022-11-26 00:35:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:35:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 89 [2022-11-26 00:35:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:05,113 INFO L225 Difference]: With dead ends: 1458 [2022-11-26 00:35:05,113 INFO L226 Difference]: Without dead ends: 891 [2022-11-26 00:35:05,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 215 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=252, Invalid=2718, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:35:05,116 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 274 mSDsluCounter, 4311 mSDsCounter, 0 mSdLazyCounter, 3657 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 4588 SdHoareTripleChecker+Invalid, 3747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:05,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 4588 Invalid, 3747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [90 Valid, 3657 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-26 00:35:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-26 00:35:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 859. [2022-11-26 00:35:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 624 states have (on average 1.248397435897436) internal successors, (779), 631 states have internal predecessors, (779), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-26 00:35:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1075 transitions. [2022-11-26 00:35:05,367 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1075 transitions. Word has length 89 [2022-11-26 00:35:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:05,368 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1075 transitions. [2022-11-26 00:35:05,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 00:35:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1075 transitions. [2022-11-26 00:35:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-26 00:35:05,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:05,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:05,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-26 00:35:05,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-26 00:35:05,583 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash 340124573, now seen corresponding path program 1 times [2022-11-26 00:35:05,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:05,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222709163] [2022-11-26 00:35:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:05,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:35:05,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:05,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222709163] [2022-11-26 00:35:05,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222709163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:05,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371292450] [2022-11-26 00:35:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:05,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:05,899 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:05,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:35:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:35:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:35:06,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:35:06,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371292450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:06,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109287797] [2022-11-26 00:35:06,366 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-26 00:35:06,366 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:06,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:06,367 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:06,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:09,242 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:35:09,264 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:35:09,280 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 93 for LOIs [2022-11-26 00:35:09,366 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 135 for LOIs [2022-11-26 00:35:09,636 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2022-11-26 00:35:09,661 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:47,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [109287797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:47,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:47,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [8, 9, 9] total 59 [2022-11-26 00:35:47,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170178557] [2022-11-26 00:35:47,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:47,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-26 00:35:47,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-26 00:35:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3106, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:35:47,312 INFO L87 Difference]: Start difference. First operand 859 states and 1075 transitions. Second operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-26 00:36:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:19,197 INFO L93 Difference]: Finished difference Result 1445 states and 1838 transitions. [2022-11-26 00:36:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-26 00:36:19,198 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 93 [2022-11-26 00:36:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:19,202 INFO L225 Difference]: With dead ends: 1445 [2022-11-26 00:36:19,202 INFO L226 Difference]: Without dead ends: 881 [2022-11-26 00:36:19,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 217 SyntacticMatches, 14 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 60.9s TimeCoverageRelationStatistics Valid=568, Invalid=4982, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 00:36:19,206 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 200 mSDsluCounter, 4146 mSDsCounter, 0 mSdLazyCounter, 3452 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 4413 SdHoareTripleChecker+Invalid, 3555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:19,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 4413 Invalid, 3555 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [103 Valid, 3452 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-26 00:36:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-26 00:36:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 846. [2022-11-26 00:36:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 615 states have (on average 1.245528455284553) internal successors, (766), 622 states have internal predecessors, (766), 144 states have call successors, (144), 86 states have call predecessors, (144), 86 states have return successors, (144), 137 states have call predecessors, (144), 144 states have call successors, (144) [2022-11-26 00:36:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1054 transitions. [2022-11-26 00:36:19,376 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1054 transitions. Word has length 93 [2022-11-26 00:36:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:19,376 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1054 transitions. [2022-11-26 00:36:19,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-26 00:36:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1054 transitions. [2022-11-26 00:36:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-26 00:36:19,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:19,378 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:36:19,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:36:19,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:36:19,584 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:36:19,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:19,585 INFO L85 PathProgramCache]: Analyzing trace with hash -201313897, now seen corresponding path program 1 times [2022-11-26 00:36:19,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:36:19,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794317055] [2022-11-26 00:36:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:19,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:36:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:36:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:36:19,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:36:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794317055] [2022-11-26 00:36:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794317055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:36:19,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:36:19,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:36:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026286748] [2022-11-26 00:36:19,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:36:19,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:36:19,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:36:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:36:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:36:19,754 INFO L87 Difference]: Start difference. First operand 846 states and 1054 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-26 00:36:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:20,008 INFO L93 Difference]: Finished difference Result 1411 states and 1785 transitions. [2022-11-26 00:36:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:36:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 103 [2022-11-26 00:36:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:20,013 INFO L225 Difference]: With dead ends: 1411 [2022-11-26 00:36:20,013 INFO L226 Difference]: Without dead ends: 834 [2022-11-26 00:36:20,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:36:20,015 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 7 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:20,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 577 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:36:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-11-26 00:36:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 784. [2022-11-26 00:36:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 573 states have (on average 1.2111692844677138) internal successors, (694), 580 states have internal predecessors, (694), 130 states have call successors, (130), 80 states have call predecessors, (130), 80 states have return successors, (130), 123 states have call predecessors, (130), 130 states have call successors, (130) [2022-11-26 00:36:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 954 transitions. [2022-11-26 00:36:20,221 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 954 transitions. Word has length 103 [2022-11-26 00:36:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:20,221 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 954 transitions. [2022-11-26 00:36:20,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-26 00:36:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 954 transitions. [2022-11-26 00:36:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-26 00:36:20,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:20,224 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:36:20,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:36:20,224 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:36:20,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash 387551495, now seen corresponding path program 1 times [2022-11-26 00:36:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:36:20,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093593213] [2022-11-26 00:36:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:36:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:36:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:36:20,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:36:20,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093593213] [2022-11-26 00:36:20,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093593213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:36:20,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:36:20,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:36:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676772342] [2022-11-26 00:36:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:36:20,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:36:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:36:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:36:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:36:20,394 INFO L87 Difference]: Start difference. First operand 784 states and 954 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-26 00:36:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:20,634 INFO L93 Difference]: Finished difference Result 1254 states and 1556 transitions. [2022-11-26 00:36:20,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:36:20,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 119 [2022-11-26 00:36:20,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:20,638 INFO L225 Difference]: With dead ends: 1254 [2022-11-26 00:36:20,638 INFO L226 Difference]: Without dead ends: 772 [2022-11-26 00:36:20,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:36:20,640 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 6 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:20,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 568 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:36:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-11-26 00:36:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 756. [2022-11-26 00:36:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 553 states have (on average 1.1898734177215189) internal successors, (658), 560 states have internal predecessors, (658), 124 states have call successors, (124), 78 states have call predecessors, (124), 78 states have return successors, (124), 117 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-26 00:36:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 906 transitions. [2022-11-26 00:36:20,844 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 906 transitions. Word has length 119 [2022-11-26 00:36:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:20,845 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 906 transitions. [2022-11-26 00:36:20,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-26 00:36:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 906 transitions. [2022-11-26 00:36:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-26 00:36:20,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:20,847 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:36:20,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-26 00:36:20,848 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:36:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:20,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1426610211, now seen corresponding path program 1 times [2022-11-26 00:36:20,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:36:20,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157110029] [2022-11-26 00:36:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:20,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:36:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:36:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:36:21,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:36:21,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157110029] [2022-11-26 00:36:21,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157110029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:36:21,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486001247] [2022-11-26 00:36:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:21,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:36:21,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:36:21,640 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:36:21,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:36:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:36:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:36:21,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:36:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:36:21,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:36:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-26 00:36:22,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486001247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:36:22,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954289264] [2022-11-26 00:36:22,140 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-26 00:36:22,140 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:36:22,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:36:22,141 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:36:22,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:36:27,582 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 150 for LOIs [2022-11-26 00:36:27,627 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:36:27,645 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 120 for LOIs [2022-11-26 00:36:27,754 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-26 00:36:27,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:36:57,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1954289264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:36:57,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:36:57,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [9, 9, 9] total 55 [2022-11-26 00:36:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491812592] [2022-11-26 00:36:57,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:36:57,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-26 00:36:57,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:36:57,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-26 00:36:57,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2622, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:36:57,058 INFO L87 Difference]: Start difference. First operand 756 states and 906 transitions. Second operand has 37 states, 32 states have (on average 1.71875) internal successors, (55), 25 states have internal predecessors, (55), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-26 00:37:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:02,801 INFO L93 Difference]: Finished difference Result 1274 states and 1551 transitions. [2022-11-26 00:37:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-26 00:37:02,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.71875) internal successors, (55), 25 states have internal predecessors, (55), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 128 [2022-11-26 00:37:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:02,805 INFO L225 Difference]: With dead ends: 1274 [2022-11-26 00:37:02,805 INFO L226 Difference]: Without dead ends: 766 [2022-11-26 00:37:02,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 332 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=357, Invalid=2723, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:37:02,807 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 28 mSDsluCounter, 2055 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:02,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2232 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-26 00:37:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-26 00:37:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 756. [2022-11-26 00:37:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 553 states have (on average 1.1880650994575046) internal successors, (657), 560 states have internal predecessors, (657), 124 states have call successors, (124), 78 states have call predecessors, (124), 78 states have return successors, (124), 117 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-26 00:37:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 905 transitions. [2022-11-26 00:37:02,958 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 905 transitions. Word has length 128 [2022-11-26 00:37:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:02,958 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 905 transitions. [2022-11-26 00:37:02,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.71875) internal successors, (55), 25 states have internal predecessors, (55), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-26 00:37:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 905 transitions. [2022-11-26 00:37:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 00:37:02,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:02,961 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:37:02,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:37:03,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:03,168 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:37:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:03,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1294765139, now seen corresponding path program 1 times [2022-11-26 00:37:03,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:03,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864325303] [2022-11-26 00:37:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:03,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:37:04,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864325303] [2022-11-26 00:37:04,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864325303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:37:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075460921] [2022-11-26 00:37:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:04,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:04,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:04,013 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:04,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:37:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:04,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-26 00:37:04,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 00:37:05,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:37:05,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075460921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:05,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246524652] [2022-11-26 00:37:05,615 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2022-11-26 00:37:05,615 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:37:05,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:37:05,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:37:05,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:37:20,363 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 207 for LOIs [2022-11-26 00:37:20,728 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2022-11-26 00:37:20,734 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 96 for LOIs [2022-11-26 00:37:20,818 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 156 for LOIs [2022-11-26 00:37:20,864 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-11-26 00:37:20,911 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 95 for LOIs [2022-11-26 00:37:20,937 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:38:19,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1246524652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:19,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:19,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [9, 9, 9] total 68 [2022-11-26 00:38:19,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910919064] [2022-11-26 00:38:19,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:19,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-26 00:38:19,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-26 00:38:19,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=3867, Unknown=0, NotChecked=0, Total=4556 [2022-11-26 00:38:19,920 INFO L87 Difference]: Start difference. First operand 756 states and 905 transitions. Second operand has 50 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 34 states have internal predecessors, (57), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-26 00:38:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:47,368 INFO L93 Difference]: Finished difference Result 1347 states and 1651 transitions. [2022-11-26 00:38:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-26 00:38:47,368 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 34 states have internal predecessors, (57), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 136 [2022-11-26 00:38:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:47,372 INFO L225 Difference]: With dead ends: 1347 [2022-11-26 00:38:47,372 INFO L226 Difference]: Without dead ends: 848 [2022-11-26 00:38:47,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 329 SyntacticMatches, 21 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 78.3s TimeCoverageRelationStatistics Valid=943, Invalid=5377, Unknown=0, NotChecked=0, Total=6320 [2022-11-26 00:38:47,375 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 129 mSDsluCounter, 2788 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:47,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 2972 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-11-26 00:38:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-11-26 00:38:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 826. [2022-11-26 00:38:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 603 states have (on average 1.185737976782753) internal successors, (715), 610 states have internal predecessors, (715), 138 states have call successors, (138), 84 states have call predecessors, (138), 84 states have return successors, (138), 131 states have call predecessors, (138), 138 states have call successors, (138) [2022-11-26 00:38:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 991 transitions. [2022-11-26 00:38:47,635 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 991 transitions. Word has length 136 [2022-11-26 00:38:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:47,636 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 991 transitions. [2022-11-26 00:38:47,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 34 states have internal predecessors, (57), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-26 00:38:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 991 transitions. [2022-11-26 00:38:47,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 00:38:47,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:47,638 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:47,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:47,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-26 00:38:47,846 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:47,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1543522355, now seen corresponding path program 1 times [2022-11-26 00:38:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:47,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984234808] [2022-11-26 00:38:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:47,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:38:48,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:48,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984234808] [2022-11-26 00:38:48,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984234808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:48,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922130784] [2022-11-26 00:38:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:48,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:48,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:48,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:48,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:38:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:49,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-26 00:38:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 65 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 00:38:49,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:38:50,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922130784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:50,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518446700] [2022-11-26 00:38:50,221 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-26 00:38:50,221 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:50,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:38:50,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:38:50,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:32,384 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 56 for LOIs [2022-11-26 00:39:32,433 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2022-11-26 00:39:32,439 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 111 for LOIs [2022-11-26 00:39:32,536 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 93 for LOIs [2022-11-26 00:39:32,639 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 124 for LOIs [2022-11-26 00:39:32,834 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 92 for LOIs [2022-11-26 00:39:32,865 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:40:17,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74124#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_476| Int)) (and (<= 0 |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_476|) (<= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_476| 1) (= (ite (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_476| 0) 0 1) |assert_#in~arg|))) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (mod assert_~arg 256) 0) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= ~side1_written~0 1) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:40:17,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:40:17,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:40:17,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-26 00:40:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15055259] [2022-11-26 00:40:17,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:17,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:40:17,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:40:17,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=5652, Unknown=0, NotChecked=0, Total=6320 [2022-11-26 00:40:17,035 INFO L87 Difference]: Start difference. First operand 826 states and 991 transitions. Second operand has 19 states, 19 states have (on average 7.684210526315789) internal successors, (146), 19 states have internal predecessors, (146), 7 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (35), 7 states have call predecessors, (35), 7 states have call successors, (35) [2022-11-26 00:40:21,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:21,543 INFO L93 Difference]: Finished difference Result 1818 states and 2342 transitions. [2022-11-26 00:40:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:40:21,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.684210526315789) internal successors, (146), 19 states have internal predecessors, (146), 7 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (35), 7 states have call predecessors, (35), 7 states have call successors, (35) Word has length 136 [2022-11-26 00:40:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:21,549 INFO L225 Difference]: With dead ends: 1818 [2022-11-26 00:40:21,550 INFO L226 Difference]: Without dead ends: 1372 [2022-11-26 00:40:21,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 332 SyntacticMatches, 12 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=1030, Invalid=9272, Unknown=0, NotChecked=0, Total=10302 [2022-11-26 00:40:21,553 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1628 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:21,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 2197 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 00:40:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-11-26 00:40:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 956. [2022-11-26 00:40:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 697 states have (on average 1.175035868005739) internal successors, (819), 704 states have internal predecessors, (819), 158 states have call successors, (158), 100 states have call predecessors, (158), 100 states have return successors, (158), 151 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-26 00:40:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1135 transitions. [2022-11-26 00:40:21,903 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1135 transitions. Word has length 136 [2022-11-26 00:40:21,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:21,903 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1135 transitions. [2022-11-26 00:40:21,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.684210526315789) internal successors, (146), 19 states have internal predecessors, (146), 7 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (35), 7 states have call predecessors, (35), 7 states have call successors, (35) [2022-11-26 00:40:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1135 transitions. [2022-11-26 00:40:21,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 00:40:21,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:21,906 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:21,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:40:22,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:22,120 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1701824659, now seen corresponding path program 1 times [2022-11-26 00:40:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:22,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662086233] [2022-11-26 00:40:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:22,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:40:22,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:22,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662086233] [2022-11-26 00:40:22,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662086233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:40:22,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078959631] [2022-11-26 00:40:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:22,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:22,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:22,992 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:22,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b878d48-2125-49bd-849b-d09e986ee68e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:40:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:23,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:40:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 26 proven. 47 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 00:40:23,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-26 00:40:23,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078959631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:23,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213181838] [2022-11-26 00:40:23,621 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-26 00:40:23,621 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:40:23,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:40:23,622 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:40:23,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:40:40,086 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 96 for LOIs [2022-11-26 00:40:40,132 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2022-11-26 00:40:40,144 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 95 for LOIs [2022-11-26 00:40:40,280 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 103 for LOIs [2022-11-26 00:40:40,328 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 95 for LOIs [2022-11-26 00:40:40,370 INFO L180 IcfgInterpreter]: Interpretation finished