./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5d72e5e7abaa750c1c0009f2e3addca35915e1b949637f5a49ed633aadc3fe53 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 04:53:19,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:53:19,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:53:20,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:53:20,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:53:20,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:53:20,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:53:20,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:53:20,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:53:20,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:53:20,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:53:20,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:53:20,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:53:20,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:53:20,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:53:20,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:53:20,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:53:20,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:53:20,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:53:20,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:53:20,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:53:20,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:53:20,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:53:20,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:53:20,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:53:20,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:53:20,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:53:20,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:53:20,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:53:20,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:53:20,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:53:20,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:53:20,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:53:20,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:53:20,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:53:20,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:53:20,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:53:20,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:53:20,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:53:20,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:53:20,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:53:20,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:53:20,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:53:20,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:53:20,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:53:20,075 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:53:20,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:53:20,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:53:20,076 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:53:20,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:53:20,077 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:53:20,077 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:53:20,077 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:53:20,077 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:53:20,077 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:53:20,078 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:53:20,078 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:53:20,078 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:53:20,078 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:53:20,078 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:53:20,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:53:20,079 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:53:20,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:53:20,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:53:20,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:53:20,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:53:20,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:53:20,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:53:20,080 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:53:20,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:53:20,080 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:53:20,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:53:20,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:53:20,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:53:20,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:53:20,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:53:20,081 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:53:20,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:53:20,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:53:20,081 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:53:20,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:53:20,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:53:20,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:53:20,082 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_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d72e5e7abaa750c1c0009f2e3addca35915e1b949637f5a49ed633aadc3fe53 [2022-12-14 04:53:20,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:53:20,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:53:20,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:53:20,266 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:53:20,266 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:53:20,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2022-12-14 04:53:22,852 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:53:23,023 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:53:23,023 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2022-12-14 04:53:23,029 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/data/b534d2f80/4915cfaf836041cb9c6010018142a8fe/FLAGbe2e1256c [2022-12-14 04:53:23,039 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/data/b534d2f80/4915cfaf836041cb9c6010018142a8fe [2022-12-14 04:53:23,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:53:23,042 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:53:23,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:53:23,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:53:23,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:53:23,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc14d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23, skipping insertion in model container [2022-12-14 04:53:23,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:53:23,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:53:23,229 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_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2022-12-14 04:53:23,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:53:23,241 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:53:23,283 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_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2022-12-14 04:53:23,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:53:23,295 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:53:23,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23 WrapperNode [2022-12-14 04:53:23,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:53:23,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:53:23,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:53:23,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:53:23,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,336 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 479 [2022-12-14 04:53:23,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:53:23,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:53:23,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:53:23,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:53:23,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,361 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:53:23,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:53:23,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:53:23,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:53:23,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (1/1) ... [2022-12-14 04:53:23,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:53:23,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:53:23,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:53:23,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:53:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-12-14 04:53:23,430 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-12-14 04:53:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:53:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-12-14 04:53:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-12-14 04:53:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-12-14 04:53:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-12-14 04:53:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-12-14 04:53:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-12-14 04:53:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 04:53:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 04:53:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:53:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-12-14 04:53:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-12-14 04:53:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:53:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:53:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-12-14 04:53:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-12-14 04:53:23,511 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:53:23,513 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:53:23,915 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:53:24,007 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:53:24,008 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 04:53:24,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:53:24 BoogieIcfgContainer [2022-12-14 04:53:24,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:53:24,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:53:24,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:53:24,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:53:24,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:53:23" (1/3) ... [2022-12-14 04:53:24,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660b2122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:53:24, skipping insertion in model container [2022-12-14 04:53:24,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:23" (2/3) ... [2022-12-14 04:53:24,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660b2122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:53:24, skipping insertion in model container [2022-12-14 04:53:24,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:53:24" (3/3) ... [2022-12-14 04:53:24,016 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2022-12-14 04:53:24,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:53:24,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:53:24,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:53:24,081 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;@210dfc7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:53:24,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:53:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 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) [2022-12-14 04:53:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 04:53:24,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:24,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:24,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash 940025637, now seen corresponding path program 1 times [2022-12-14 04:53:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:24,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764151356] [2022-12-14 04:53:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:24,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:24,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:24,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764151356] [2022-12-14 04:53:24,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764151356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:24,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:24,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:53:24,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883948874] [2022-12-14 04:53:24,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:24,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:53:24,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:53:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:53:24,510 INFO L87 Difference]: Start difference. First operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 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) [2022-12-14 04:53:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:24,618 INFO L93 Difference]: Finished difference Result 298 states and 487 transitions. [2022-12-14 04:53:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:53:24,620 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 [2022-12-14 04:53:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:24,629 INFO L225 Difference]: With dead ends: 298 [2022-12-14 04:53:24,629 INFO L226 Difference]: Without dead ends: 152 [2022-12-14 04:53:24,633 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 [2022-12-14 04:53:24,636 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 5 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:24,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 635 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-14 04:53:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-12-14 04:53:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 113 states have internal predecessors, (169), 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) [2022-12-14 04:53:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 231 transitions. [2022-12-14 04:53:24,685 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 231 transitions. Word has length 19 [2022-12-14 04:53:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:24,686 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 231 transitions. [2022-12-14 04:53:24,686 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) [2022-12-14 04:53:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 231 transitions. [2022-12-14 04:53:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 04:53:24,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:24,688 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] [2022-12-14 04:53:24,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:53:24,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1579928659, now seen corresponding path program 1 times [2022-12-14 04:53:24,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:24,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522008964] [2022-12-14 04:53:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:24,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:53:24,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522008964] [2022-12-14 04:53:24,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522008964] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:24,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:24,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:53:24,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423124882] [2022-12-14 04:53:24,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:24,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:53:24,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:24,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:53:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:53:24,802 INFO L87 Difference]: Start difference. First operand 152 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 04:53:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:25,072 INFO L93 Difference]: Finished difference Result 432 states and 672 transitions. [2022-12-14 04:53:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:53:25,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-12-14 04:53:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:25,075 INFO L225 Difference]: With dead ends: 432 [2022-12-14 04:53:25,075 INFO L226 Difference]: Without dead ends: 283 [2022-12-14 04:53:25,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:53:25,076 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 570 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:25,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 593 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:53:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-12-14 04:53:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 186. [2022-12-14 04:53:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.5106382978723405) internal successors, (213), 141 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 04:53:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2022-12-14 04:53:25,095 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 30 [2022-12-14 04:53:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:25,096 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2022-12-14 04:53:25,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 04:53:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2022-12-14 04:53:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 04:53:25,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:25,097 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] [2022-12-14 04:53:25,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 04:53:25,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2031615976, now seen corresponding path program 1 times [2022-12-14 04:53:25,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:25,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127375470] [2022-12-14 04:53:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:25,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:53:25,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:25,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127375470] [2022-12-14 04:53:25,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127375470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:25,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:25,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:53:25,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39443203] [2022-12-14 04:53:25,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:53:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:53:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:53:25,162 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 04:53:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:25,393 INFO L93 Difference]: Finished difference Result 432 states and 670 transitions. [2022-12-14 04:53:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:53:25,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-12-14 04:53:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:25,396 INFO L225 Difference]: With dead ends: 432 [2022-12-14 04:53:25,396 INFO L226 Difference]: Without dead ends: 283 [2022-12-14 04:53:25,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:53:25,398 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 566 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:25,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 596 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:53:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-12-14 04:53:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 186. [2022-12-14 04:53:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.50354609929078) internal successors, (212), 141 states have internal predecessors, (212), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 04:53:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 280 transitions. [2022-12-14 04:53:25,417 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 280 transitions. Word has length 31 [2022-12-14 04:53:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:25,417 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 280 transitions. [2022-12-14 04:53:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 04:53:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 280 transitions. [2022-12-14 04:53:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 04:53:25,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:25,418 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] [2022-12-14 04:53:25,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 04:53:25,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:25,419 INFO L85 PathProgramCache]: Analyzing trace with hash 221392883, now seen corresponding path program 1 times [2022-12-14 04:53:25,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:25,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520054857] [2022-12-14 04:53:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:53:25,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:25,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520054857] [2022-12-14 04:53:25,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520054857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:25,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:25,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:53:25,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343616239] [2022-12-14 04:53:25,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:25,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:53:25,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:53:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:53:25,547 INFO L87 Difference]: Start difference. First operand 186 states and 280 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-12-14 04:53:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:25,606 INFO L93 Difference]: Finished difference Result 340 states and 514 transitions. [2022-12-14 04:53:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:53:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 33 [2022-12-14 04:53:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:25,608 INFO L225 Difference]: With dead ends: 340 [2022-12-14 04:53:25,608 INFO L226 Difference]: Without dead ends: 191 [2022-12-14 04:53:25,609 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 [2022-12-14 04:53:25,610 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 6 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:25,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 647 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-14 04:53:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-12-14 04:53:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.4896551724137932) internal successors, (216), 145 states have internal predecessors, (216), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 04:53:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 284 transitions. [2022-12-14 04:53:25,632 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 284 transitions. Word has length 33 [2022-12-14 04:53:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:25,632 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 284 transitions. [2022-12-14 04:53:25,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-12-14 04:53:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 284 transitions. [2022-12-14 04:53:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 04:53:25,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:25,634 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] [2022-12-14 04:53:25,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 04:53:25,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash 611086105, now seen corresponding path program 1 times [2022-12-14 04:53:25,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:25,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833982682] [2022-12-14 04:53:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:25,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:53:25,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:25,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833982682] [2022-12-14 04:53:25,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833982682] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:25,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:25,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:53:25,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94462422] [2022-12-14 04:53:25,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:25,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:53:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:25,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:53:25,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:53:25,782 INFO L87 Difference]: Start difference. First operand 191 states and 284 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-12-14 04:53:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:25,837 INFO L93 Difference]: Finished difference Result 350 states and 525 transitions. [2022-12-14 04:53:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:53:25,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 41 [2022-12-14 04:53:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:25,838 INFO L225 Difference]: With dead ends: 350 [2022-12-14 04:53:25,838 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 04:53:25,839 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 [2022-12-14 04:53:25,839 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:25,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 04:53:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-12-14 04:53:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 149 states have (on average 1.476510067114094) internal successors, (220), 149 states have internal predecessors, (220), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 04:53:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 288 transitions. [2022-12-14 04:53:25,851 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 288 transitions. Word has length 41 [2022-12-14 04:53:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:25,851 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 288 transitions. [2022-12-14 04:53:25,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-12-14 04:53:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 288 transitions. [2022-12-14 04:53:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 04:53:25,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:25,852 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, 1, 1, 1, 1, 1] [2022-12-14 04:53:25,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 04:53:25,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:25,853 INFO L85 PathProgramCache]: Analyzing trace with hash 36466403, now seen corresponding path program 1 times [2022-12-14 04:53:25,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:25,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915194074] [2022-12-14 04:53:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:25,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:53:25,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:25,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915194074] [2022-12-14 04:53:25,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915194074] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:25,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:25,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:53:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139950134] [2022-12-14 04:53:25,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:25,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:53:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:53:25,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:53:25,953 INFO L87 Difference]: Start difference. First operand 196 states and 288 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-12-14 04:53:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:25,999 INFO L93 Difference]: Finished difference Result 359 states and 529 transitions. [2022-12-14 04:53:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:53:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 49 [2022-12-14 04:53:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:26,000 INFO L225 Difference]: With dead ends: 359 [2022-12-14 04:53:26,000 INFO L226 Difference]: Without dead ends: 200 [2022-12-14 04:53:26,001 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 [2022-12-14 04:53:26,001 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:26,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 642 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-14 04:53:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-12-14 04:53:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.4671052631578947) internal successors, (223), 152 states have internal predecessors, (223), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 04:53:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 291 transitions. [2022-12-14 04:53:26,012 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 291 transitions. Word has length 49 [2022-12-14 04:53:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:26,012 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 291 transitions. [2022-12-14 04:53:26,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-12-14 04:53:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 291 transitions. [2022-12-14 04:53:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 04:53:26,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:26,014 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, 1, 1, 1, 1, 1] [2022-12-14 04:53:26,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 04:53:26,014 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:26,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1862041590, now seen corresponding path program 1 times [2022-12-14 04:53:26,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:26,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207401462] [2022-12-14 04:53:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:26,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:53:26,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:26,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207401462] [2022-12-14 04:53:26,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207401462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:26,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:26,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:53:26,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347230927] [2022-12-14 04:53:26,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:26,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:53:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:26,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:53:26,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:53:26,146 INFO L87 Difference]: Start difference. First operand 200 states and 291 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-12-14 04:53:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:26,201 INFO L93 Difference]: Finished difference Result 368 states and 539 transitions. [2022-12-14 04:53:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:53:26,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 49 [2022-12-14 04:53:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:26,203 INFO L225 Difference]: With dead ends: 368 [2022-12-14 04:53:26,203 INFO L226 Difference]: Without dead ends: 205 [2022-12-14 04:53:26,204 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 [2022-12-14 04:53:26,204 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:26,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-12-14 04:53:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-12-14 04:53:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 156 states have (on average 1.455128205128205) internal successors, (227), 156 states have internal predecessors, (227), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 04:53:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 295 transitions. [2022-12-14 04:53:26,221 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 295 transitions. Word has length 49 [2022-12-14 04:53:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:26,221 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 295 transitions. [2022-12-14 04:53:26,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-12-14 04:53:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 295 transitions. [2022-12-14 04:53:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 04:53:26,223 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:26,223 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, 1, 1, 1, 1, 1] [2022-12-14 04:53:26,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 04:53:26,223 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:26,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2131134058, now seen corresponding path program 1 times [2022-12-14 04:53:26,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:26,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122255980] [2022-12-14 04:53:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:26,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:53:26,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:26,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122255980] [2022-12-14 04:53:26,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122255980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:26,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:26,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:53:26,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238192473] [2022-12-14 04:53:26,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:26,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:53:26,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:26,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:53:26,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:53:26,406 INFO L87 Difference]: Start difference. First operand 205 states and 295 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-12-14 04:53:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:26,450 INFO L93 Difference]: Finished difference Result 379 states and 546 transitions. [2022-12-14 04:53:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:53:26,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 57 [2022-12-14 04:53:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:26,451 INFO L225 Difference]: With dead ends: 379 [2022-12-14 04:53:26,451 INFO L226 Difference]: Without dead ends: 211 [2022-12-14 04:53:26,452 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 [2022-12-14 04:53:26,452 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 7 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:26,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 644 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:26,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-14 04:53:26,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-12-14 04:53:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 161 states have internal predecessors, (232), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 04:53:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 300 transitions. [2022-12-14 04:53:26,463 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 300 transitions. Word has length 57 [2022-12-14 04:53:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:26,463 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 300 transitions. [2022-12-14 04:53:26,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-12-14 04:53:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 300 transitions. [2022-12-14 04:53:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 04:53:26,464 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:26,464 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, 1] [2022-12-14 04:53:26,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 04:53:26,464 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash -180629249, now seen corresponding path program 1 times [2022-12-14 04:53:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:26,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334889375] [2022-12-14 04:53:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:26,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:53:26,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:26,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334889375] [2022-12-14 04:53:26,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334889375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:53:26,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941571011] [2022-12-14 04:53:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:26,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:26,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:53:26,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:53:26,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:53:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 04:53:26,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:53:27,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:53:27,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941571011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:27,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:53:27,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-12-14 04:53:27,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630816221] [2022-12-14 04:53:27,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:27,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:53:27,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:53:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 04:53:27,040 INFO L87 Difference]: Start difference. First operand 211 states and 300 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 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) [2022-12-14 04:53:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:27,273 INFO L93 Difference]: Finished difference Result 598 states and 836 transitions. [2022-12-14 04:53:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 04:53:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 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 60 [2022-12-14 04:53:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:27,275 INFO L225 Difference]: With dead ends: 598 [2022-12-14 04:53:27,276 INFO L226 Difference]: Without dead ends: 398 [2022-12-14 04:53:27,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-12-14 04:53:27,277 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 212 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:27,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1160 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:53:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-12-14 04:53:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2022-12-14 04:53:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 299 states have (on average 1.4214046822742474) internal successors, (425), 300 states have internal predecessors, (425), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2022-12-14 04:53:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 555 transitions. [2022-12-14 04:53:27,309 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 555 transitions. Word has length 60 [2022-12-14 04:53:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:27,309 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 555 transitions. [2022-12-14 04:53:27,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 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) [2022-12-14 04:53:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 555 transitions. [2022-12-14 04:53:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 04:53:27,311 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:27,311 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, 1, 1, 1] [2022-12-14 04:53:27,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 04:53:27,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:27,512 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash 361908346, now seen corresponding path program 1 times [2022-12-14 04:53:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:27,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765371687] [2022-12-14 04:53:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:27,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:53:27,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:27,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765371687] [2022-12-14 04:53:27,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765371687] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:53:27,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453232316] [2022-12-14 04:53:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:27,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:27,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:53:27,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:53:27,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 04:53:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:28,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:53:28,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:28,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:53:28,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453232316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766043879] [2022-12-14 04:53:28,380 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 04:53:28,380 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:53:28,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:53:28,387 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:53:28,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:53:30,975 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 04:53:30,998 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 04:53:31,014 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 04:53:31,067 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:53:43,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1766043879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:43,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:53:43,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 04:53:43,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69765871] [2022-12-14 04:53:43,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:43,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 04:53:43,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:43,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 04:53:43,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 04:53:43,278 INFO L87 Difference]: Start difference. First operand 395 states and 555 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-12-14 04:53:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:47,798 INFO L93 Difference]: Finished difference Result 819 states and 1158 transitions. [2022-12-14 04:53:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 04:53:47,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 62 [2022-12-14 04:53:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:47,801 INFO L225 Difference]: With dead ends: 819 [2022-12-14 04:53:47,801 INFO L226 Difference]: Without dead ends: 464 [2022-12-14 04:53:47,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 04:53:47,803 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 120 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3150 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:47,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3150 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 04:53:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-12-14 04:53:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 441. [2022-12-14 04:53:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 330 states have (on average 1.4) internal successors, (462), 331 states have internal predecessors, (462), 78 states have call successors, (78), 32 states have call predecessors, (78), 32 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 04:53:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 618 transitions. [2022-12-14 04:53:47,859 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 618 transitions. Word has length 62 [2022-12-14 04:53:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:47,859 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 618 transitions. [2022-12-14 04:53:47,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-12-14 04:53:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 618 transitions. [2022-12-14 04:53:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 04:53:47,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:47,861 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, 1, 1, 1] [2022-12-14 04:53:47,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 04:53:48,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 04:53:48,062 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:48,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2121358426, now seen corresponding path program 1 times [2022-12-14 04:53:48,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:48,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617501690] [2022-12-14 04:53:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:48,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:53:48,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:48,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617501690] [2022-12-14 04:53:48,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617501690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:53:48,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596870075] [2022-12-14 04:53:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:48,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:48,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:53:48,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:53:48,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 04:53:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:53:48,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:48,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:53:48,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596870075] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920517349] [2022-12-14 04:53:48,778 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 04:53:48,778 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:53:48,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:53:48,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:53:48,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:53:50,212 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 04:53:50,234 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 04:53:50,250 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 04:53:50,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:54:02,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1920517349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:54:02,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:54:02,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 04:54:02,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37443691] [2022-12-14 04:54:02,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:54:02,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 04:54:02,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 04:54:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 04:54:02,235 INFO L87 Difference]: Start difference. First operand 441 states and 618 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-12-14 04:54:06,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:06,802 INFO L93 Difference]: Finished difference Result 888 states and 1254 transitions. [2022-12-14 04:54:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 04:54:06,803 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 62 [2022-12-14 04:54:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:06,804 INFO L225 Difference]: With dead ends: 888 [2022-12-14 04:54:06,804 INFO L226 Difference]: Without dead ends: 522 [2022-12-14 04:54:06,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 04:54:06,806 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 77 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 3319 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:06,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 3319 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 04:54:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-12-14 04:54:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 499. [2022-12-14 04:54:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 371 states have (on average 1.371967654986523) internal successors, (509), 372 states have internal predecessors, (509), 92 states have call successors, (92), 35 states have call predecessors, (92), 35 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 04:54:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 693 transitions. [2022-12-14 04:54:06,875 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 693 transitions. Word has length 62 [2022-12-14 04:54:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:06,876 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 693 transitions. [2022-12-14 04:54:06,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-12-14 04:54:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 693 transitions. [2022-12-14 04:54:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 04:54:06,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:06,877 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, 1, 1, 1, 1, 1] [2022-12-14 04:54:06,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 04:54:07,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 04:54:07,078 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash 663906581, now seen corresponding path program 1 times [2022-12-14 04:54:07,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:07,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633251039] [2022-12-14 04:54:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:07,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:54:07,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:07,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633251039] [2022-12-14 04:54:07,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633251039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191635408] [2022-12-14 04:54:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:07,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:07,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:07,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:07,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 04:54:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:07,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:54:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:07,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:54:07,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191635408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:07,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536417561] [2022-12-14 04:54:07,652 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-12-14 04:54:07,652 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:54:07,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:54:07,653 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:54:07,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:54:09,666 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 04:54:09,691 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 04:54:09,707 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 04:54:09,749 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:54:23,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [536417561] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:54:23,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:54:23,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2022-12-14 04:54:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154524882] [2022-12-14 04:54:23,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:54:23,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 04:54:23,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 04:54:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 04:54:23,087 INFO L87 Difference]: Start difference. First operand 499 states and 693 transitions. Second operand has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 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) [2022-12-14 04:54:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:29,548 INFO L93 Difference]: Finished difference Result 923 states and 1299 transitions. [2022-12-14 04:54:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 04:54:29,549 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 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 64 [2022-12-14 04:54:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:29,551 INFO L225 Difference]: With dead ends: 923 [2022-12-14 04:54:29,551 INFO L226 Difference]: Without dead ends: 568 [2022-12-14 04:54:29,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 04:54:29,552 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 131 mSDsluCounter, 4627 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 4946 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:29,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 4946 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-12-14 04:54:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-12-14 04:54:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 519. [2022-12-14 04:54:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 385 states have (on average 1.3532467532467531) internal successors, (521), 386 states have internal predecessors, (521), 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) [2022-12-14 04:54:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 715 transitions. [2022-12-14 04:54:29,629 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 715 transitions. Word has length 64 [2022-12-14 04:54:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:29,629 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 715 transitions. [2022-12-14 04:54:29,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 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) [2022-12-14 04:54:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 715 transitions. [2022-12-14 04:54:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 04:54:29,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:29,630 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] [2022-12-14 04:54:29,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 04:54:29,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:29,831 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1746566064, now seen corresponding path program 1 times [2022-12-14 04:54:29,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:29,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105836299] [2022-12-14 04:54:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:29,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:54:29,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:29,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105836299] [2022-12-14 04:54:29,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105836299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:54:29,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:54:29,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:54:29,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119177650] [2022-12-14 04:54:29,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:54:29,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:54:29,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:29,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:54:29,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:54:29,906 INFO L87 Difference]: Start difference. First operand 519 states and 715 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-12-14 04:54:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:30,030 INFO L93 Difference]: Finished difference Result 930 states and 1308 transitions. [2022-12-14 04:54:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:54:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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 66 [2022-12-14 04:54:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:30,032 INFO L225 Difference]: With dead ends: 930 [2022-12-14 04:54:30,032 INFO L226 Difference]: Without dead ends: 527 [2022-12-14 04:54:30,033 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 [2022-12-14 04:54:30,033 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:30,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 642 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:54:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-12-14 04:54:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2022-12-14 04:54:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 391 states have (on average 1.3478260869565217) internal successors, (527), 392 states have internal predecessors, (527), 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) [2022-12-14 04:54:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 721 transitions. [2022-12-14 04:54:30,113 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 721 transitions. Word has length 66 [2022-12-14 04:54:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:30,113 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 721 transitions. [2022-12-14 04:54:30,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-12-14 04:54:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 721 transitions. [2022-12-14 04:54:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 04:54:30,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:30,114 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, 1, 1, 1, 1, 1] [2022-12-14 04:54:30,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 04:54:30,114 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:30,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:30,114 INFO L85 PathProgramCache]: Analyzing trace with hash 772289194, now seen corresponding path program 1 times [2022-12-14 04:54:30,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:30,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114273468] [2022-12-14 04:54:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 04:54:30,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:30,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114273468] [2022-12-14 04:54:30,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114273468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:30,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036480825] [2022-12-14 04:54:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:30,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:30,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:30,311 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:30,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 04:54:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:30,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:54:30,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:30,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 04:54:30,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036480825] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:30,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1247662575] [2022-12-14 04:54:30,661 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-12-14 04:54:30,661 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:54:30,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:54:30,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:54:30,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:54:34,134 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-12-14 04:54:34,331 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 04:54:34,347 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 192 for LOIs [2022-12-14 04:54:34,465 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-12-14 04:54:34,502 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 04:54:34,546 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 04:54:34,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:55:07,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16602#(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 [2022-12-14 04:55:07,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:55:07,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:07,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-12-14 04:55:07,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106457971] [2022-12-14 04:55:07,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:07,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 04:55:07,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:07,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 04:55:07,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 04:55:07,554 INFO L87 Difference]: Start difference. First operand 527 states and 721 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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) [2022-12-14 04:55:07,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:07,978 INFO L93 Difference]: Finished difference Result 1268 states and 1770 transitions. [2022-12-14 04:55:07,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 04:55:07,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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 70 [2022-12-14 04:55:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:07,981 INFO L225 Difference]: With dead ends: 1268 [2022-12-14 04:55:07,981 INFO L226 Difference]: Without dead ends: 873 [2022-12-14 04:55:07,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=287, Invalid=3253, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 04:55:07,983 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 303 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:07,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 2542 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:55:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-12-14 04:55:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 549. [2022-12-14 04:55:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 406 states have (on average 1.3103448275862069) internal successors, (532), 409 states have internal predecessors, (532), 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) [2022-12-14 04:55:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 722 transitions. [2022-12-14 04:55:08,086 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 722 transitions. Word has length 70 [2022-12-14 04:55:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:08,086 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 722 transitions. [2022-12-14 04:55:08,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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) [2022-12-14 04:55:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 722 transitions. [2022-12-14 04:55:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 04:55:08,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:08,087 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, 1, 1, 1] [2022-12-14 04:55:08,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 04:55:08,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 04:55:08,288 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 220483239, now seen corresponding path program 1 times [2022-12-14 04:55:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:08,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861633349] [2022-12-14 04:55:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:08,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 04:55:08,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:08,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861633349] [2022-12-14 04:55:08,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861633349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:55:08,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:55:08,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 04:55:08,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039850719] [2022-12-14 04:55:08,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:55:08,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:55:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:55:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:55:08,514 INFO L87 Difference]: Start difference. First operand 549 states and 722 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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) [2022-12-14 04:55:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:09,200 INFO L93 Difference]: Finished difference Result 1207 states and 1671 transitions. [2022-12-14 04:55:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 04:55:09,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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 71 [2022-12-14 04:55:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:09,203 INFO L225 Difference]: With dead ends: 1207 [2022-12-14 04:55:09,203 INFO L226 Difference]: Without dead ends: 896 [2022-12-14 04:55:09,204 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 [2022-12-14 04:55:09,204 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 670 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:09,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1647 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 04:55:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-12-14 04:55:09,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 683. [2022-12-14 04:55:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 503 states have (on average 1.312127236580517) internal successors, (660), 506 states have internal predecessors, (660), 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) [2022-12-14 04:55:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 898 transitions. [2022-12-14 04:55:09,327 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 898 transitions. Word has length 71 [2022-12-14 04:55:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:09,327 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 898 transitions. [2022-12-14 04:55:09,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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) [2022-12-14 04:55:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 898 transitions. [2022-12-14 04:55:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 04:55:09,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:09,328 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, 1, 1, 1, 1, 1] [2022-12-14 04:55:09,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 04:55:09,328 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash 210288124, now seen corresponding path program 1 times [2022-12-14 04:55:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:09,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534498533] [2022-12-14 04:55:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 04:55:09,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:09,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534498533] [2022-12-14 04:55:09,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534498533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:55:09,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:55:09,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 04:55:09,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701050079] [2022-12-14 04:55:09,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:55:09,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:55:09,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:55:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:55:09,481 INFO L87 Difference]: Start difference. First operand 683 states and 898 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-12-14 04:55:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:10,359 INFO L93 Difference]: Finished difference Result 1582 states and 2191 transitions. [2022-12-14 04:55:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 04:55:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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 73 [2022-12-14 04:55:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:10,362 INFO L225 Difference]: With dead ends: 1582 [2022-12-14 04:55:10,363 INFO L226 Difference]: Without dead ends: 1241 [2022-12-14 04:55:10,363 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 [2022-12-14 04:55:10,364 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 599 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:10,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 2321 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 04:55:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2022-12-14 04:55:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 950. [2022-12-14 04:55:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 695 states have (on average 1.3237410071942446) internal successors, (920), 700 states have internal predecessors, (920), 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) [2022-12-14 04:55:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1258 transitions. [2022-12-14 04:55:10,545 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1258 transitions. Word has length 73 [2022-12-14 04:55:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:10,546 INFO L495 AbstractCegarLoop]: Abstraction has 950 states and 1258 transitions. [2022-12-14 04:55:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-12-14 04:55:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1258 transitions. [2022-12-14 04:55:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 04:55:10,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:10,547 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, 1, 1, 1, 1, 1] [2022-12-14 04:55:10,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 04:55:10,547 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -345143512, now seen corresponding path program 1 times [2022-12-14 04:55:10,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:10,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773919080] [2022-12-14 04:55:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 04:55:10,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773919080] [2022-12-14 04:55:10,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773919080] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405418880] [2022-12-14 04:55:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:10,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:10,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:10,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:10,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 04:55:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:55:10,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:55:10,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:55:10,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405418880] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:10,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691424913] [2022-12-14 04:55:10,991 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-12-14 04:55:10,991 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:55:10,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:55:10,991 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:55:10,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:55:13,963 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 04:55:13,985 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 04:55:14,001 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 04:55:14,072 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 04:55:14,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:55:34,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1691424913] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:55:34,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:34,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-12-14 04:55:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380734062] [2022-12-14 04:55:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:55:34,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 04:55:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 04:55:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 04:55:34,537 INFO L87 Difference]: Start difference. First operand 950 states and 1258 transitions. Second operand has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 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) [2022-12-14 04:55:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:38,463 INFO L93 Difference]: Finished difference Result 1535 states and 2055 transitions. [2022-12-14 04:55:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 04:55:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 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 77 [2022-12-14 04:55:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:38,466 INFO L225 Difference]: With dead ends: 1535 [2022-12-14 04:55:38,466 INFO L226 Difference]: Without dead ends: 936 [2022-12-14 04:55:38,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 04:55:38,468 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 68 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:38,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2003 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 04:55:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-12-14 04:55:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 936. [2022-12-14 04:55:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 685 states have (on average 1.3226277372262774) internal successors, (906), 690 states have internal predecessors, (906), 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) [2022-12-14 04:55:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1238 transitions. [2022-12-14 04:55:38,629 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1238 transitions. Word has length 77 [2022-12-14 04:55:38,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:38,629 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1238 transitions. [2022-12-14 04:55:38,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 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) [2022-12-14 04:55:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1238 transitions. [2022-12-14 04:55:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 04:55:38,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:38,630 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, 1, 1, 1, 1, 1] [2022-12-14 04:55:38,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 04:55:38,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 04:55:38,832 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:38,833 INFO L85 PathProgramCache]: Analyzing trace with hash -70764728, now seen corresponding path program 1 times [2022-12-14 04:55:38,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:38,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52118622] [2022-12-14 04:55:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:38,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 04:55:39,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:39,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52118622] [2022-12-14 04:55:39,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52118622] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:39,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688086889] [2022-12-14 04:55:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:39,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:39,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:39,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:39,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 04:55:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:39,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 04:55:39,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:55:39,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:55:39,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688086889] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:55:39,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:55:39,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 04:55:39,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944646859] [2022-12-14 04:55:39,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:55:39,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:55:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:55:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 04:55:39,255 INFO L87 Difference]: Start difference. First operand 936 states and 1238 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 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) [2022-12-14 04:55:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:39,827 INFO L93 Difference]: Finished difference Result 1832 states and 2500 transitions. [2022-12-14 04:55:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:55:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 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 77 [2022-12-14 04:55:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:39,830 INFO L225 Difference]: With dead ends: 1832 [2022-12-14 04:55:39,831 INFO L226 Difference]: Without dead ends: 1116 [2022-12-14 04:55:39,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-12-14 04:55:39,832 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 515 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:39,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1625 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:55:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-12-14 04:55:40,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 936. [2022-12-14 04:55:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 685 states have (on average 1.3167883211678832) internal successors, (902), 690 states have internal predecessors, (902), 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) [2022-12-14 04:55:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1234 transitions. [2022-12-14 04:55:40,019 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1234 transitions. Word has length 77 [2022-12-14 04:55:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:40,019 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1234 transitions. [2022-12-14 04:55:40,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 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) [2022-12-14 04:55:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1234 transitions. [2022-12-14 04:55:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 04:55:40,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:40,020 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, 1, 1, 1, 1, 1] [2022-12-14 04:55:40,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 04:55:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 04:55:40,221 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 900440666, now seen corresponding path program 1 times [2022-12-14 04:55:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:40,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288007706] [2022-12-14 04:55:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:40,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 04:55:40,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:40,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288007706] [2022-12-14 04:55:40,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288007706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:55:40,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:55:40,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 04:55:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793015560] [2022-12-14 04:55:40,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:55:40,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:55:40,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:55:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:55:40,341 INFO L87 Difference]: Start difference. First operand 936 states and 1234 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2022-12-14 04:55:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:40,669 INFO L93 Difference]: Finished difference Result 1241 states and 1714 transitions. [2022-12-14 04:55:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:55:40,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 80 [2022-12-14 04:55:40,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:40,674 INFO L225 Difference]: With dead ends: 1241 [2022-12-14 04:55:40,674 INFO L226 Difference]: Without dead ends: 1239 [2022-12-14 04:55:40,674 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 [2022-12-14 04:55:40,675 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 171 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:40,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1541 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:55:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-12-14 04:55:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 944. [2022-12-14 04:55:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 689 states have (on average 1.3149492017416546) internal successors, (906), 696 states have internal predecessors, (906), 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) [2022-12-14 04:55:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1242 transitions. [2022-12-14 04:55:40,892 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1242 transitions. Word has length 80 [2022-12-14 04:55:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:40,893 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1242 transitions. [2022-12-14 04:55:40,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2022-12-14 04:55:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1242 transitions. [2022-12-14 04:55:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 04:55:40,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:40,894 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, 1, 1, 1, 1, 1] [2022-12-14 04:55:40,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 04:55:40,894 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash -950005833, now seen corresponding path program 1 times [2022-12-14 04:55:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:40,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393362310] [2022-12-14 04:55:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:40,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 04:55:40,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:40,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393362310] [2022-12-14 04:55:40,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393362310] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:55:40,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:55:40,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:55:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254092840] [2022-12-14 04:55:40,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:55:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:55:40,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:55:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:55:40,997 INFO L87 Difference]: Start difference. First operand 944 states and 1242 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-12-14 04:55:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:41,210 INFO L93 Difference]: Finished difference Result 1626 states and 2156 transitions. [2022-12-14 04:55:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:55:41,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 83 [2022-12-14 04:55:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:41,213 INFO L225 Difference]: With dead ends: 1626 [2022-12-14 04:55:41,213 INFO L226 Difference]: Without dead ends: 932 [2022-12-14 04:55:41,214 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 [2022-12-14 04:55:41,214 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 7 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:41,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 634 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:55:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-12-14 04:55:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 932. [2022-12-14 04:55:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 683 states have (on average 1.2913616398243046) internal successors, (882), 690 states have internal predecessors, (882), 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) [2022-12-14 04:55:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1206 transitions. [2022-12-14 04:55:41,385 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1206 transitions. Word has length 83 [2022-12-14 04:55:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:41,385 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1206 transitions. [2022-12-14 04:55:41,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-12-14 04:55:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1206 transitions. [2022-12-14 04:55:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 04:55:41,386 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:41,386 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, 1, 1, 1, 1, 1] [2022-12-14 04:55:41,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 04:55:41,386 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1171331438, now seen corresponding path program 1 times [2022-12-14 04:55:41,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:41,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277039708] [2022-12-14 04:55:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:41,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 04:55:41,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277039708] [2022-12-14 04:55:41,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277039708] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576712805] [2022-12-14 04:55:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:41,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:41,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:41,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:41,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 04:55:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:41,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:55:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 04:55:42,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 04:55:42,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576712805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227161213] [2022-12-14 04:55:42,192 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 04:55:42,192 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:55:42,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:55:42,192 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:55:42,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:55:46,405 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 241 for LOIs [2022-12-14 04:55:46,602 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 04:55:46,619 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-12-14 04:55:46,707 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 157 for LOIs [2022-12-14 04:55:46,745 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-12-14 04:55:46,789 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 04:55:46,832 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:56:24,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39294#(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)))) (<= 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|) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (<= 0 ~manual_selection_History_2~0) (= ~side2_written~0 0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 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) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 04:56:24,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:56:24,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:56:24,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2022-12-14 04:56:24,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638909049] [2022-12-14 04:56:24,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:56:24,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:56:24,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:56:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:56:24,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=3893, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 04:56:24,345 INFO L87 Difference]: Start difference. First operand 932 states and 1206 transitions. Second operand has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-14 04:56:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:56:25,452 INFO L93 Difference]: Finished difference Result 2259 states and 3126 transitions. [2022-12-14 04:56:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 04:56:25,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 85 [2022-12-14 04:56:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:56:25,457 INFO L225 Difference]: With dead ends: 2259 [2022-12-14 04:56:25,457 INFO L226 Difference]: Without dead ends: 1502 [2022-12-14 04:56:25,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 187 SyntacticMatches, 15 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 04:56:25,459 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 478 mSDsluCounter, 4356 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 4734 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:56:25,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 4734 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 04:56:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-12-14 04:56:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 911. [2022-12-14 04:56:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 668 states have (on average 1.284431137724551) internal successors, (858), 675 states have internal predecessors, (858), 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) [2022-12-14 04:56:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1170 transitions. [2022-12-14 04:56:25,639 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1170 transitions. Word has length 85 [2022-12-14 04:56:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:56:25,639 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1170 transitions. [2022-12-14 04:56:25,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-14 04:56:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1170 transitions. [2022-12-14 04:56:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 04:56:25,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:56:25,640 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, 1, 1, 1] [2022-12-14 04:56:25,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 04:56:25,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 04:56:25,842 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:56:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:56:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2104528376, now seen corresponding path program 1 times [2022-12-14 04:56:25,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:56:25,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312342504] [2022-12-14 04:56:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:25,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:56:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 04:56:26,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:56:26,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312342504] [2022-12-14 04:56:26,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312342504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:26,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967856694] [2022-12-14 04:56:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:26,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:26,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:26,047 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:26,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 04:56:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:26,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:56:26,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:56:26,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 04:56:26,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967856694] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:56:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828719384] [2022-12-14 04:56:26,299 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 04:56:26,299 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:56:26,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:56:26,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:56:26,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:56:28,970 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 04:56:28,992 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 04:56:29,007 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 04:56:29,091 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 152 for LOIs [2022-12-14 04:56:29,135 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 04:56:29,177 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:56:58,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [828719384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:56:58,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:56:58,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-12-14 04:56:58,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133338786] [2022-12-14 04:56:58,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:56:58,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 04:56:58,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:56:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 04:56:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 04:56:58,772 INFO L87 Difference]: Start difference. First operand 911 states and 1170 transitions. Second operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 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) [2022-12-14 04:57:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:57:05,407 INFO L93 Difference]: Finished difference Result 1536 states and 2008 transitions. [2022-12-14 04:57:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 04:57:05,408 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 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 85 [2022-12-14 04:57:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:57:05,410 INFO L225 Difference]: With dead ends: 1536 [2022-12-14 04:57:05,410 INFO L226 Difference]: Without dead ends: 946 [2022-12-14 04:57:05,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 199 SyntacticMatches, 14 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 04:57:05,411 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 186 mSDsluCounter, 3493 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 3773 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:57:05,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 3773 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-12-14 04:57:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-12-14 04:57:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 914. [2022-12-14 04:57:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 670 states have (on average 1.2835820895522387) internal successors, (860), 677 states have internal predecessors, (860), 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) [2022-12-14 04:57:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1174 transitions. [2022-12-14 04:57:05,592 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1174 transitions. Word has length 85 [2022-12-14 04:57:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:57:05,592 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1174 transitions. [2022-12-14 04:57:05,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 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) [2022-12-14 04:57:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1174 transitions. [2022-12-14 04:57:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 04:57:05,593 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:57:05,593 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, 1, 1, 1, 1, 1] [2022-12-14 04:57:05,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 04:57:05,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 04:57:05,794 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:57:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:57:05,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1191534301, now seen corresponding path program 1 times [2022-12-14 04:57:05,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:57:05,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962371770] [2022-12-14 04:57:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:05,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:57:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 04:57:05,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:57:05,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962371770] [2022-12-14 04:57:05,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962371770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:57:05,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676512825] [2022-12-14 04:57:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:05,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:05,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:57:05,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:57:05,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 04:57:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:06,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:57:06,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:57:06,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 04:57:06,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676512825] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:57:06,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845880379] [2022-12-14 04:57:06,257 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 04:57:06,257 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:57:06,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:57:06,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:57:06,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:57:09,097 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 04:57:09,120 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 04:57:09,136 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 04:57:09,232 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 04:57:09,275 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 04:57:09,316 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:57:39,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1845880379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:57:39,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:57:39,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-12-14 04:57:39,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586528376] [2022-12-14 04:57:39,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:57:39,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 04:57:39,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:57:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 04:57:39,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 04:57:39,228 INFO L87 Difference]: Start difference. First operand 914 states and 1174 transitions. Second operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 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) [2022-12-14 04:57:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:57:48,702 INFO L93 Difference]: Finished difference Result 1539 states and 2012 transitions. [2022-12-14 04:57:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 04:57:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 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 87 [2022-12-14 04:57:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:57:48,705 INFO L225 Difference]: With dead ends: 1539 [2022-12-14 04:57:48,705 INFO L226 Difference]: Without dead ends: 949 [2022-12-14 04:57:48,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 206 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=257, Invalid=2823, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 04:57:48,707 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 131 mSDsluCounter, 5388 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 5689 SdHoareTripleChecker+Invalid, 4475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:57:48,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 5689 Invalid, 4475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-12-14 04:57:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-12-14 04:57:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 917. [2022-12-14 04:57:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 672 states have (on average 1.2827380952380953) internal successors, (862), 679 states have internal predecessors, (862), 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) [2022-12-14 04:57:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1178 transitions. [2022-12-14 04:57:48,894 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1178 transitions. Word has length 87 [2022-12-14 04:57:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:57:48,895 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1178 transitions. [2022-12-14 04:57:48,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 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) [2022-12-14 04:57:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1178 transitions. [2022-12-14 04:57:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 04:57:48,895 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:57:48,896 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, 1, 1, 1, 1, 1] [2022-12-14 04:57:48,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 04:57:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:49,097 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:57:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:57:49,098 INFO L85 PathProgramCache]: Analyzing trace with hash 352734337, now seen corresponding path program 1 times [2022-12-14 04:57:49,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:57:49,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058098301] [2022-12-14 04:57:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:49,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:57:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 04:57:49,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:57:49,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058098301] [2022-12-14 04:57:49,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058098301] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:57:49,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:57:49,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:57:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477665939] [2022-12-14 04:57:49,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:57:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:57:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:57:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:57:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:57:49,226 INFO L87 Difference]: Start difference. First operand 917 states and 1178 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, (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) [2022-12-14 04:57:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:57:49,465 INFO L93 Difference]: Finished difference Result 1560 states and 2026 transitions. [2022-12-14 04:57:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:57:49,465 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, (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 92 [2022-12-14 04:57:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:57:49,467 INFO L225 Difference]: With dead ends: 1560 [2022-12-14 04:57:49,467 INFO L226 Difference]: Without dead ends: 905 [2022-12-14 04:57:49,468 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 [2022-12-14 04:57:49,469 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 7 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:57:49,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 616 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:57:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-12-14 04:57:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 905. [2022-12-14 04:57:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 666 states have (on average 1.2582582582582582) internal successors, (838), 673 states have internal predecessors, (838), 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) [2022-12-14 04:57:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1142 transitions. [2022-12-14 04:57:49,659 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1142 transitions. Word has length 92 [2022-12-14 04:57:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:57:49,659 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1142 transitions. [2022-12-14 04:57:49,659 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, (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) [2022-12-14 04:57:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1142 transitions. [2022-12-14 04:57:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 04:57:49,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:57:49,660 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] [2022-12-14 04:57:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 04:57:49,660 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:57:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:57:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash -717473955, now seen corresponding path program 1 times [2022-12-14 04:57:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:57:49,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143401743] [2022-12-14 04:57:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:49,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:57:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:57:49,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:57:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143401743] [2022-12-14 04:57:49,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143401743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:57:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976841523] [2022-12-14 04:57:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:49,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:49,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:57:49,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:57:49,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 04:57:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:57:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 04:57:49,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 04:57:50,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976841523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:57:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315534880] [2022-12-14 04:57:50,081 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 04:57:50,081 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:57:50,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:57:50,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:57:50,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:57:53,247 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 04:57:53,270 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 04:57:53,286 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 04:57:53,374 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-12-14 04:57:53,727 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 04:57:53,772 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:58:27,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [315534880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:58:27,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:58:27,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 04:58:27,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29194092] [2022-12-14 04:58:27,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:58:27,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 04:58:27,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:58:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 04:58:27,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 04:58:27,120 INFO L87 Difference]: Start difference. First operand 905 states and 1142 transitions. Second operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 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) [2022-12-14 04:58:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:58:34,206 INFO L93 Difference]: Finished difference Result 1509 states and 1935 transitions. [2022-12-14 04:58:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 04:58:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 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 92 [2022-12-14 04:58:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:58:34,209 INFO L225 Difference]: With dead ends: 1509 [2022-12-14 04:58:34,209 INFO L226 Difference]: Without dead ends: 927 [2022-12-14 04:58:34,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 04:58:34,210 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 173 mSDsluCounter, 3891 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 3390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:58:34,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 4170 Invalid, 3390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3318 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-12-14 04:58:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-12-14 04:58:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 892. [2022-12-14 04:58:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 657 states have (on average 1.2557077625570776) internal successors, (825), 664 states have internal predecessors, (825), 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) [2022-12-14 04:58:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1121 transitions. [2022-12-14 04:58:34,396 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1121 transitions. Word has length 92 [2022-12-14 04:58:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:58:34,396 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1121 transitions. [2022-12-14 04:58:34,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 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) [2022-12-14 04:58:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1121 transitions. [2022-12-14 04:58:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 04:58:34,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:58:34,397 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, 1] [2022-12-14 04:58:34,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 04:58:34,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:58:34,599 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:58:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:58:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1106605352, now seen corresponding path program 1 times [2022-12-14 04:58:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:58:34,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712556730] [2022-12-14 04:58:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:58:34,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:58:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:58:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:58:34,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:58:34,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712556730] [2022-12-14 04:58:34,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712556730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:58:34,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809416696] [2022-12-14 04:58:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:58:34,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:58:34,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:58:34,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:58:34,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 04:58:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:58:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:58:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:58:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 04:58:34,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:58:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 04:58:35,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809416696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:58:35,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644340618] [2022-12-14 04:58:35,031 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-12-14 04:58:35,031 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:58:35,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:58:35,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:58:35,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:58:37,891 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 04:58:37,913 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 04:58:37,930 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-12-14 04:58:38,261 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-12-14 04:58:38,604 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 04:58:38,645 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:59:13,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [644340618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:59:13,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:59:13,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 04:59:13,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966369667] [2022-12-14 04:59:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:59:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 04:59:13,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:59:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 04:59:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 04:59:13,582 INFO L87 Difference]: Start difference. First operand 892 states and 1121 transitions. Second operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 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) [2022-12-14 04:59:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:59:22,732 INFO L93 Difference]: Finished difference Result 1509 states and 1935 transitions. [2022-12-14 04:59:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 04:59:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 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 94 [2022-12-14 04:59:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:59:22,735 INFO L225 Difference]: With dead ends: 1509 [2022-12-14 04:59:22,735 INFO L226 Difference]: Without dead ends: 924 [2022-12-14 04:59:22,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 225 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 04:59:22,736 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 200 mSDsluCounter, 5127 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 5427 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:59:22,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 5427 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4232 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-12-14 04:59:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-12-14 04:59:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 892. [2022-12-14 04:59:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 657 states have (on average 1.2541856925418569) internal successors, (824), 664 states have internal predecessors, (824), 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) [2022-12-14 04:59:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1120 transitions. [2022-12-14 04:59:22,925 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1120 transitions. Word has length 94 [2022-12-14 04:59:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:59:22,925 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1120 transitions. [2022-12-14 04:59:22,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 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) [2022-12-14 04:59:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1120 transitions. [2022-12-14 04:59:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 04:59:22,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:59:22,927 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, 1, 1, 1, 1, 1] [2022-12-14 04:59:22,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 04:59:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 04:59:23,129 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:59:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:59:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1544233509, now seen corresponding path program 1 times [2022-12-14 04:59:23,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:59:23,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699998875] [2022-12-14 04:59:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:59:23,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:59:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:59:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:59:23,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:59:23,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699998875] [2022-12-14 04:59:23,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699998875] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:59:23,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504480760] [2022-12-14 04:59:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:59:23,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:59:23,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:59:23,319 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:59:23,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 04:59:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:59:23,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:59:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:59:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 04:59:23,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:59:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 04:59:23,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504480760] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:59:23,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [844908270] [2022-12-14 04:59:23,581 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-12-14 04:59:23,581 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:59:23,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:59:23,582 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:59:23,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:59:27,079 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 04:59:27,100 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 04:59:27,117 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-12-14 04:59:27,182 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-12-14 04:59:27,526 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 04:59:27,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:00:03,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [844908270] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:00:03,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:00:03,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2022-12-14 05:00:03,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221675050] [2022-12-14 05:00:03,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:00:03,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 05:00:03,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:03,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 05:00:03,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 05:00:03,475 INFO L87 Difference]: Start difference. First operand 892 states and 1120 transitions. Second operand has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 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) [2022-12-14 05:00:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:13,095 INFO L93 Difference]: Finished difference Result 1496 states and 1913 transitions. [2022-12-14 05:00:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 05:00:13,096 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 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 98 [2022-12-14 05:00:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:13,098 INFO L225 Difference]: With dead ends: 1496 [2022-12-14 05:00:13,098 INFO L226 Difference]: Without dead ends: 914 [2022-12-14 05:00:13,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 05:00:13,100 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 147 mSDsluCounter, 4711 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 4992 SdHoareTripleChecker+Invalid, 4251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:13,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 4992 Invalid, 4251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4205 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-12-14 05:00:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-12-14 05:00:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 879. [2022-12-14 05:00:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 648 states have (on average 1.251543209876543) internal successors, (811), 655 states have internal predecessors, (811), 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) [2022-12-14 05:00:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1099 transitions. [2022-12-14 05:00:13,288 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1099 transitions. Word has length 98 [2022-12-14 05:00:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:13,288 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1099 transitions. [2022-12-14 05:00:13,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 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) [2022-12-14 05:00:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1099 transitions. [2022-12-14 05:00:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 05:00:13,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:13,289 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, 1, 1, 1, 1, 1] [2022-12-14 05:00:13,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 05:00:13,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 05:00:13,491 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:13,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1971068227, now seen corresponding path program 1 times [2022-12-14 05:00:13,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:13,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959254044] [2022-12-14 05:00:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:13,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 05:00:13,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:13,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959254044] [2022-12-14 05:00:13,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959254044] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:00:13,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:00:13,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:00:13,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751056372] [2022-12-14 05:00:13,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:00:13,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:00:13,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:13,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:00:13,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:00:13,618 INFO L87 Difference]: Start difference. First operand 879 states and 1099 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-12-14 05:00:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:13,834 INFO L93 Difference]: Finished difference Result 1462 states and 1860 transitions. [2022-12-14 05:00:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:00:13,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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 108 [2022-12-14 05:00:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:13,836 INFO L225 Difference]: With dead ends: 1462 [2022-12-14 05:00:13,836 INFO L226 Difference]: Without dead ends: 867 [2022-12-14 05:00:13,837 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 [2022-12-14 05:00:13,837 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:13,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 604 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:00:13,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-12-14 05:00:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 817. [2022-12-14 05:00:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 606 states have (on average 1.2194719471947195) internal successors, (739), 613 states have internal predecessors, (739), 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) [2022-12-14 05:00:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 999 transitions. [2022-12-14 05:00:14,016 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 999 transitions. Word has length 108 [2022-12-14 05:00:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:14,016 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 999 transitions. [2022-12-14 05:00:14,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-12-14 05:00:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 999 transitions. [2022-12-14 05:00:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 05:00:14,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:14,017 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, 1, 1, 1, 1, 1] [2022-12-14 05:00:14,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 05:00:14,017 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:14,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1497761095, now seen corresponding path program 1 times [2022-12-14 05:00:14,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:14,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106725671] [2022-12-14 05:00:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:14,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:00:14,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:14,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106725671] [2022-12-14 05:00:14,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106725671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:00:14,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:00:14,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:00:14,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941262654] [2022-12-14 05:00:14,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:00:14,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:00:14,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:14,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:00:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:00:14,113 INFO L87 Difference]: Start difference. First operand 817 states and 999 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-12-14 05:00:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:14,322 INFO L93 Difference]: Finished difference Result 1305 states and 1631 transitions. [2022-12-14 05:00:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:00:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 124 [2022-12-14 05:00:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:14,324 INFO L225 Difference]: With dead ends: 1305 [2022-12-14 05:00:14,324 INFO L226 Difference]: Without dead ends: 805 [2022-12-14 05:00:14,325 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 [2022-12-14 05:00:14,325 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 6 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:14,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 595 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:00:14,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-12-14 05:00:14,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 789. [2022-12-14 05:00:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 586 states have (on average 1.1996587030716723) internal successors, (703), 593 states have internal predecessors, (703), 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) [2022-12-14 05:00:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 951 transitions. [2022-12-14 05:00:14,500 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 951 transitions. Word has length 124 [2022-12-14 05:00:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:14,500 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 951 transitions. [2022-12-14 05:00:14,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-12-14 05:00:14,501 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 951 transitions. [2022-12-14 05:00:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 05:00:14,501 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:14,502 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:00:14,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 05:00:14,502 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1310692744, now seen corresponding path program 1 times [2022-12-14 05:00:14,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:14,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850287454] [2022-12-14 05:00:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:14,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:00:14,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:14,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850287454] [2022-12-14 05:00:14,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850287454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:00:14,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345996793] [2022-12-14 05:00:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:14,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:00:14,704 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:00:14,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:00:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:00:14,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:00:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 05:00:14,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:00:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 05:00:14,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345996793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:00:14,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [279756313] [2022-12-14 05:00:14,955 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-12-14 05:00:14,955 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:00:14,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:00:14,955 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:00:14,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:00:21,511 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-12-14 05:00:21,612 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 05:00:21,628 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 05:00:21,726 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-12-14 05:00:21,758 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-12-14 05:00:22,162 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 184 for LOIs [2022-12-14 05:00:22,572 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:01:08,384 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72173#(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) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~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|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 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)))) (= ~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 [2022-12-14 05:01:08,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:01:08,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:01:08,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-12-14 05:01:08,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452736162] [2022-12-14 05:01:08,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:01:08,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:01:08,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:01:08,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:01:08,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 05:01:08,386 INFO L87 Difference]: Start difference. First operand 789 states and 951 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 05:01:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:01:09,405 INFO L93 Difference]: Finished difference Result 2118 states and 2709 transitions. [2022-12-14 05:01:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:01:09,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) Word has length 134 [2022-12-14 05:01:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:01:09,410 INFO L225 Difference]: With dead ends: 2118 [2022-12-14 05:01:09,410 INFO L226 Difference]: Without dead ends: 1496 [2022-12-14 05:01:09,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 05:01:09,412 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 535 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2327 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:01:09,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 2327 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:01:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-12-14 05:01:09,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1092. [2022-12-14 05:01:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 808 states have (on average 1.1893564356435644) internal successors, (961), 818 states have internal predecessors, (961), 172 states have call successors, (172), 111 states have call predecessors, (172), 111 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2022-12-14 05:01:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1305 transitions. [2022-12-14 05:01:09,661 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1305 transitions. Word has length 134 [2022-12-14 05:01:09,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:01:09,661 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1305 transitions. [2022-12-14 05:01:09,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 05:01:09,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1305 transitions. [2022-12-14 05:01:09,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 05:01:09,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:01:09,662 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:01:09,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 05:01:09,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:09,864 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:01:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:01:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash -380507736, now seen corresponding path program 1 times [2022-12-14 05:01:09,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:01:09,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773597140] [2022-12-14 05:01:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:01:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 05:01:11,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:01:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773597140] [2022-12-14 05:01:11,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773597140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:01:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331377560] [2022-12-14 05:01:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:11,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:11,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:01:11,651 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:01:11,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:01:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:11,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:01:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:01:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 05:01:12,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:01:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 05:01:12,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331377560] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:01:12,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710342660] [2022-12-14 05:01:12,733 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-12-14 05:01:12,733 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:01:12,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:01:12,733 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:01:12,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:01:20,235 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 92 for LOIs [2022-12-14 05:01:20,338 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 05:01:20,354 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 05:01:20,442 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 152 for LOIs [2022-12-14 05:01:20,474 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 122 for LOIs [2022-12-14 05:01:20,580 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 197 for LOIs [2022-12-14 05:01:20,992 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:02:20,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77344#(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) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~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|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 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)))) (= ~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 [2022-12-14 05:02:20,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:02:20,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:02:20,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-12-14 05:02:20,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34737896] [2022-12-14 05:02:20,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:02:20,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 05:02:20,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:02:20,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 05:02:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 05:02:20,038 INFO L87 Difference]: Start difference. First operand 1092 states and 1305 transitions. Second operand has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-12-14 05:02:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:02:26,092 INFO L93 Difference]: Finished difference Result 2864 states and 3817 transitions. [2022-12-14 05:02:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 05:02:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) Word has length 142 [2022-12-14 05:02:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:02:26,099 INFO L225 Difference]: With dead ends: 2864 [2022-12-14 05:02:26,099 INFO L226 Difference]: Without dead ends: 1981 [2022-12-14 05:02:26,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 330 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=2492, Invalid=16414, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 05:02:26,103 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1308 mSDsluCounter, 11942 mSDsCounter, 0 mSdLazyCounter, 5174 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 12412 SdHoareTripleChecker+Invalid, 5510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 5174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:02:26,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 12412 Invalid, 5510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 5174 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 05:02:26,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2022-12-14 05:02:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1033. [2022-12-14 05:02:26,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 767 states have (on average 1.21251629726206) internal successors, (930), 779 states have internal predecessors, (930), 160 states have call successors, (160), 105 states have call predecessors, (160), 105 states have return successors, (160), 148 states have call predecessors, (160), 160 states have call successors, (160) [2022-12-14 05:02:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1250 transitions. [2022-12-14 05:02:26,394 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1250 transitions. Word has length 142 [2022-12-14 05:02:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:02:26,395 INFO L495 AbstractCegarLoop]: Abstraction has 1033 states and 1250 transitions. [2022-12-14 05:02:26,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-12-14 05:02:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1250 transitions. [2022-12-14 05:02:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 05:02:26,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:02:26,396 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, 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] [2022-12-14 05:02:26,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:02:26,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:02:26,597 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:02:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:02:26,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1892400056, now seen corresponding path program 1 times [2022-12-14 05:02:26,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:02:26,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148044190] [2022-12-14 05:02:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:02:26,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:02:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:02:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:02:27,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:02:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148044190] [2022-12-14 05:02:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148044190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:02:27,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532131621] [2022-12-14 05:02:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:02:27,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:02:27,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:02:27,049 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:02:27,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:02:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:02:27,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 05:02:27,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:02:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 05:02:27,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:02:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:02:28,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532131621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:02:28,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554204176] [2022-12-14 05:02:28,198 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-12-14 05:02:28,198 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:02:28,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:02:28,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:02:28,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:02:54,202 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 59 for LOIs [2022-12-14 05:02:54,239 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2022-12-14 05:02:54,244 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 05:02:54,307 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 98 for LOIs [2022-12-14 05:02:54,381 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 91 for LOIs [2022-12-14 05:02:54,401 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 91 for LOIs [2022-12-14 05:02:54,426 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:03:33,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83550#(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)) (<= 0 ~side2_written~0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= ~active_side_History_1~0 127) (<= 0 (+ ~s1s2_new~0 1)) (exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_451| Int)) (and (<= 0 |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_451|) (= (ite (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_451| 0) 0 1) |assert_#in~arg|) (<= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_451| 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) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (<= ~active_side_History_0~0 2) (= (mod assert_~arg 256) 0) (<= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 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) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 05:03:33,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:03:33,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:03:33,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-12-14 05:03:33,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635431164] [2022-12-14 05:03:33,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:03:33,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 05:03:33,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:03:33,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 05:03:33,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=7109, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 05:03:33,531 INFO L87 Difference]: Start difference. First operand 1033 states and 1250 transitions. Second operand has 25 states, 25 states have (on average 7.72) internal successors, (193), 25 states have internal predecessors, (193), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 05:03:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:03:44,678 INFO L93 Difference]: Finished difference Result 4122 states and 5587 transitions. [2022-12-14 05:03:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-12-14 05:03:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.72) internal successors, (193), 25 states have internal predecessors, (193), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) Word has length 143 [2022-12-14 05:03:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:03:44,694 INFO L225 Difference]: With dead ends: 4122 [2022-12-14 05:03:44,694 INFO L226 Difference]: Without dead ends: 3340 [2022-12-14 05:03:44,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 344 SyntacticMatches, 16 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16285 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=3734, Invalid=34096, Unknown=0, NotChecked=0, Total=37830 [2022-12-14 05:03:44,698 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 5037 mSDsluCounter, 3926 mSDsCounter, 0 mSdLazyCounter, 4323 mSolverCounterSat, 2939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5037 SdHoareTripleChecker+Valid, 4474 SdHoareTripleChecker+Invalid, 7262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2939 IncrementalHoareTripleChecker+Valid, 4323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:03:44,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5037 Valid, 4474 Invalid, 7262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2939 Valid, 4323 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 05:03:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2022-12-14 05:03:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 1801. [2022-12-14 05:03:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1339 states have (on average 1.203883495145631) internal successors, (1612), 1352 states have internal predecessors, (1612), 278 states have call successors, (278), 183 states have call predecessors, (278), 183 states have return successors, (278), 265 states have call predecessors, (278), 278 states have call successors, (278) [2022-12-14 05:03:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2168 transitions. [2022-12-14 05:03:45,151 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2168 transitions. Word has length 143 [2022-12-14 05:03:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:03:45,151 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 2168 transitions. [2022-12-14 05:03:45,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.72) internal successors, (193), 25 states have internal predecessors, (193), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 05:03:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2168 transitions. [2022-12-14 05:03:45,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 05:03:45,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:03:45,153 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:03:45,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 05:03:45,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:03:45,353 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:03:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:03:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2019745929, now seen corresponding path program 1 times [2022-12-14 05:03:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:03:45,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193958532] [2022-12-14 05:03:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:03:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:03:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:03:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 05:03:45,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:03:45,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193958532] [2022-12-14 05:03:45,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193958532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:03:45,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:03:45,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:03:45,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924460980] [2022-12-14 05:03:45,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:03:45,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:03:45,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:03:45,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:03:45,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:03:45,460 INFO L87 Difference]: Start difference. First operand 1801 states and 2168 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 05:03:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:03:47,067 INFO L93 Difference]: Finished difference Result 6137 states and 7910 transitions. [2022-12-14 05:03:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:03:47,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 144 [2022-12-14 05:03:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:03:47,078 INFO L225 Difference]: With dead ends: 6137 [2022-12-14 05:03:47,078 INFO L226 Difference]: Without dead ends: 4564 [2022-12-14 05:03:47,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:03:47,081 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 585 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:03:47,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1875 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:03:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2022-12-14 05:03:47,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 3091. [2022-12-14 05:03:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 2275 states have (on average 1.1986813186813188) internal successors, (2727), 2300 states have internal predecessors, (2727), 500 states have call successors, (500), 315 states have call predecessors, (500), 315 states have return successors, (500), 475 states have call predecessors, (500), 500 states have call successors, (500) [2022-12-14 05:03:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 3727 transitions. [2022-12-14 05:03:47,837 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 3727 transitions. Word has length 144 [2022-12-14 05:03:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:03:47,838 INFO L495 AbstractCegarLoop]: Abstraction has 3091 states and 3727 transitions. [2022-12-14 05:03:47,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 05:03:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 3727 transitions. [2022-12-14 05:03:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 05:03:47,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:03:47,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:03:47,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 05:03:47,840 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:03:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:03:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash 64954108, now seen corresponding path program 1 times [2022-12-14 05:03:47,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:03:47,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830133961] [2022-12-14 05:03:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:03:47,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:03:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:03:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:03:47,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:03:47,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830133961] [2022-12-14 05:03:47,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830133961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:03:47,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29097442] [2022-12-14 05:03:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:03:47,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:03:47,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:03:47,991 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:03:47,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:03:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:03:48,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 05:03:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:03:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 05:03:48,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:03:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:03:48,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29097442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:03:48,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2031268900] [2022-12-14 05:03:48,838 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2022-12-14 05:03:48,839 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:03:48,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:03:48,839 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:03:48,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:04:05,730 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 56 for LOIs [2022-12-14 05:04:05,768 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 89 for LOIs [2022-12-14 05:04:05,773 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 132 for LOIs [2022-12-14 05:04:05,996 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 106 for LOIs [2022-12-14 05:04:06,087 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 122 for LOIs [2022-12-14 05:04:06,143 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 88 for LOIs [2022-12-14 05:04:06,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:04:36,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104606#(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)) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= ~active_side_History_1~0 127) (<= 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) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~active_side_History_0~0 2) (not (= 2 ~active_side_History_0~0)) (<= (+ ~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 (+ ~manual_selection_History_1~0 128)) (<= 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 [2022-12-14 05:04:36,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:04:36,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:04:36,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 9] total 24 [2022-12-14 05:04:36,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042366274] [2022-12-14 05:04:36,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:04:36,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 05:04:36,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:04:36,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 05:04:36,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=7902, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:04:36,676 INFO L87 Difference]: Start difference. First operand 3091 states and 3727 transitions. Second operand has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 9 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) [2022-12-14 05:05:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:00,445 INFO L93 Difference]: Finished difference Result 13036 states and 17633 transitions. [2022-12-14 05:05:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-12-14 05:05:00,446 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 9 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) Word has length 146 [2022-12-14 05:05:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:00,466 INFO L225 Difference]: With dead ends: 13036 [2022-12-14 05:05:00,466 INFO L226 Difference]: Without dead ends: 10173 [2022-12-14 05:05:00,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 366 SyntacticMatches, 10 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29276 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=5387, Invalid=64045, Unknown=0, NotChecked=0, Total=69432 [2022-12-14 05:05:00,473 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 5330 mSDsluCounter, 3781 mSDsCounter, 0 mSdLazyCounter, 7757 mSolverCounterSat, 3723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5330 SdHoareTripleChecker+Valid, 4201 SdHoareTripleChecker+Invalid, 11480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3723 IncrementalHoareTripleChecker+Valid, 7757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:00,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5330 Valid, 4201 Invalid, 11480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3723 Valid, 7757 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-12-14 05:05:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2022-12-14 05:05:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 4527. [2022-12-14 05:05:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4527 states, 3369 states have (on average 1.2151973879489464) internal successors, (4094), 3401 states have internal predecessors, (4094), 703 states have call successors, (703), 454 states have call predecessors, (703), 454 states have return successors, (703), 671 states have call predecessors, (703), 703 states have call successors, (703) [2022-12-14 05:05:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4527 states to 4527 states and 5500 transitions. [2022-12-14 05:05:01,755 INFO L78 Accepts]: Start accepts. Automaton has 4527 states and 5500 transitions. Word has length 146 [2022-12-14 05:05:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:01,755 INFO L495 AbstractCegarLoop]: Abstraction has 4527 states and 5500 transitions. [2022-12-14 05:05:01,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 9 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) [2022-12-14 05:05:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4527 states and 5500 transitions. [2022-12-14 05:05:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 05:05:01,758 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:01,758 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, 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] [2022-12-14 05:05:01,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 05:05:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:01,959 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:05:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 910332236, now seen corresponding path program 1 times [2022-12-14 05:05:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:05:01,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477957811] [2022-12-14 05:05:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:05:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:05:02,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:05:02,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477957811] [2022-12-14 05:05:02,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477957811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:05:02,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012161680] [2022-12-14 05:05:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:02,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:02,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:02,609 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:02,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c661c8c7-bbdd-437f-b7f3-aec14e40aa94/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:05:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:02,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 05:05:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 05:05:03,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 05:05:04,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012161680] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:04,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680994629] [2022-12-14 05:05:04,820 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-12-14 05:05:04,820 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:05:04,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:05:04,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:05:04,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:05:23,170 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 56 for LOIs [2022-12-14 05:05:23,204 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 89 for LOIs [2022-12-14 05:05:23,209 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 117 for LOIs [2022-12-14 05:05:23,283 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 105 for LOIs [2022-12-14 05:05:23,371 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 121 for LOIs [2022-12-14 05:05:23,425 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 88 for LOIs [2022-12-14 05:05:23,444 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:05:56,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '129039#(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)) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= ~active_side_History_1~0 127) (<= 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) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~active_side_History_0~0 2) (not (= 2 ~active_side_History_0~0)) (<= (+ ~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 (+ ~manual_selection_History_1~0 128)) (<= 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 [2022-12-14 05:05:56,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:05:56,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:05:56,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 17] total 32 [2022-12-14 05:05:56,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769096257] [2022-12-14 05:05:56,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:05:56,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 05:05:56,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:05:56,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 05:05:56,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=9151, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 05:05:56,520 INFO L87 Difference]: Start difference. First operand 4527 states and 5500 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 11 states have call successors, (52), 5 states have call predecessors, (52), 6 states have return successors, (51), 12 states have call predecessors, (51), 11 states have call successors, (51)