./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS --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 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df --- 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-8393723 [2022-11-19 07:32:48,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:32:48,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:32:48,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:32:48,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:32:48,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:32:48,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:32:48,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:32:48,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:32:48,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:32:48,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:32:48,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:32:48,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:32:48,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:32:48,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:32:48,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:32:48,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:32:48,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:32:48,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:32:48,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:32:48,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:32:48,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:32:48,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:32:48,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:32:48,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:32:48,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:32:48,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:32:48,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:32:48,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:32:48,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:32:48,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:32:48,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:32:48,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:32:48,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:32:48,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:32:48,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:32:48,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:32:48,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:32:48,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:32:48,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:32:48,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:32:48,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:32:48,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:32:48,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:32:48,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:32:48,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:32:48,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:32:48,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:32:48,290 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:32:48,291 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:32:48,291 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:32:48,291 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:32:48,292 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:32:48,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:32:48,293 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:32:48,293 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:32:48,293 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:32:48,293 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:32:48,294 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:32:48,294 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:32:48,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:32:48,295 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:32:48,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:32:48,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:32:48,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:32:48,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:32:48,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:32:48,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:32:48,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:32:48,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:32:48,298 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:32:48,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:32:48,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:32:48,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:32:48,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:32:48,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:32:48,299 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:32:48,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:32:48,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:32:48,300 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:32:48,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:32:48,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:32:48,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:32:48,301 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_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df [2022-11-19 07:32:48,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:32:48,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:32:48,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:32:48,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:32:48,674 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:32:48,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-11-19 07:32:48,737 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/data/49db3aff0/c1035ad66559423cb7d9df5fe60490d3/FLAG6dda9a02b [2022-11-19 07:32:49,255 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:32:49,258 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-11-19 07:32:49,270 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/data/49db3aff0/c1035ad66559423cb7d9df5fe60490d3/FLAG6dda9a02b [2022-11-19 07:32:49,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/data/49db3aff0/c1035ad66559423cb7d9df5fe60490d3 [2022-11-19 07:32:49,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:32:49,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:32:49,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:32:49,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:32:49,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:32:49,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:49" (1/1) ... [2022-11-19 07:32:49,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1951a325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:49, skipping insertion in model container [2022-11-19 07:32:49,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:49" (1/1) ... [2022-11-19 07:32:49,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:32:49,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:32:49,978 WARN L234 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_b0ec8366-274b-4099-849d-72bad00d0cbf/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c[14577,14590] [2022-11-19 07:32:49,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:32:49,991 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:32:50,064 WARN L234 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_b0ec8366-274b-4099-849d-72bad00d0cbf/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c[14577,14590] [2022-11-19 07:32:50,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:32:50,090 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:32:50,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50 WrapperNode [2022-11-19 07:32:50,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:32:50,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:32:50,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:32:50,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:32:50,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,189 INFO L138 Inliner]: procedures = 32, calls = 47, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 480 [2022-11-19 07:32:50,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:32:50,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:32:50,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:32:50,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:32:50,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,255 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:32:50,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:32:50,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:32:50,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:32:50,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (1/1) ... [2022-11-19 07:32:50,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:32:50,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:50,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:32:50,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:32:50,375 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-19 07:32:50,375 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-19 07:32:50,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:32:50,375 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-19 07:32:50,376 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-19 07:32:50,376 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-19 07:32:50,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-19 07:32:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:32:50,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:32:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:32:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-19 07:32:50,377 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-19 07:32:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:32:50,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:32:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-19 07:32:50,378 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-19 07:32:50,491 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:32:50,494 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:32:51,194 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:32:51,410 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:32:51,411 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:32:51,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:51 BoogieIcfgContainer [2022-11-19 07:32:51,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:32:51,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:32:51,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:32:51,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:32:51,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:32:49" (1/3) ... [2022-11-19 07:32:51,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b078b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:51, skipping insertion in model container [2022-11-19 07:32:51,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:50" (2/3) ... [2022-11-19 07:32:51,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b078b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:51, skipping insertion in model container [2022-11-19 07:32:51,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:51" (3/3) ... [2022-11-19 07:32:51,425 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-11-19 07:32:51,443 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:32:51,445 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:32:51,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:32:51,527 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;@fc2c961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:32:51,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:32:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 106 states have internal predecessors, (159), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-19 07:32:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:32:51,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:51,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:51,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:51,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:51,545 INFO L85 PathProgramCache]: Analyzing trace with hash -621799585, now seen corresponding path program 1 times [2022-11-19 07:32:51,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:51,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142284253] [2022-11-19 07:32:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:51,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:52,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142284253] [2022-11-19 07:32:52,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142284253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:52,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:52,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:32:52,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539585955] [2022-11-19 07:32:52,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:52,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:52,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:32:52,173 INFO L87 Difference]: Start difference. First operand has 141 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 106 states have internal predecessors, (159), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:32:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:52,356 INFO L93 Difference]: Finished difference Result 282 states and 461 transitions. [2022-11-19 07:32:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:52,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-19 07:32:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:52,368 INFO L225 Difference]: With dead ends: 282 [2022-11-19 07:32:52,368 INFO L226 Difference]: Without dead ends: 144 [2022-11-19 07:32:52,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:32:52,376 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 5 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:52,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 593 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:32:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-19 07:32:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-19 07:32:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 108 states have internal predecessors, (160), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-19 07:32:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 218 transitions. [2022-11-19 07:32:52,427 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 218 transitions. Word has length 19 [2022-11-19 07:32:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:52,427 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 218 transitions. [2022-11-19 07:32:52,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:32:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 218 transitions. [2022-11-19 07:32:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:32:52,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:52,429 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] [2022-11-19 07:32:52,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:32:52,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:52,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1437511571, now seen corresponding path program 1 times [2022-11-19 07:32:52,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:52,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890938976] [2022-11-19 07:32:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:52,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:52,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:52,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890938976] [2022-11-19 07:32:52,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890938976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:52,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:52,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:32:52,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978758604] [2022-11-19 07:32:52,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:52,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:32:52,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:32:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:32:52,640 INFO L87 Difference]: Start difference. First operand 144 states and 218 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) [2022-11-19 07:32:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:53,021 INFO L93 Difference]: Finished difference Result 402 states and 621 transitions. [2022-11-19 07:32:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:32:53,026 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 [2022-11-19 07:32:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:53,029 INFO L225 Difference]: With dead ends: 402 [2022-11-19 07:32:53,029 INFO L226 Difference]: Without dead ends: 261 [2022-11-19 07:32:53,030 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 [2022-11-19 07:32:53,032 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 521 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:53,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 549 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:32:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-19 07:32:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-11-19 07:32:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 131 states have (on average 1.4885496183206106) internal successors, (195), 131 states have internal predecessors, (195), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 07:32:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 255 transitions. [2022-11-19 07:32:53,088 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 255 transitions. Word has length 30 [2022-11-19 07:32:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:53,090 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 255 transitions. [2022-11-19 07:32:53,091 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) [2022-11-19 07:32:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 255 transitions. [2022-11-19 07:32:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:32:53,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:53,093 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] [2022-11-19 07:32:53,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:32:53,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1628500186, now seen corresponding path program 1 times [2022-11-19 07:32:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:53,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115687334] [2022-11-19 07:32:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:53,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:53,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115687334] [2022-11-19 07:32:53,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115687334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:53,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:53,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:32:53,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239116882] [2022-11-19 07:32:53,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:53,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:32:53,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:32:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:32:53,303 INFO L87 Difference]: Start difference. First operand 170 states and 255 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) [2022-11-19 07:32:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:53,632 INFO L93 Difference]: Finished difference Result 402 states and 619 transitions. [2022-11-19 07:32:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:32:53,633 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 [2022-11-19 07:32:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:53,636 INFO L225 Difference]: With dead ends: 402 [2022-11-19 07:32:53,636 INFO L226 Difference]: Without dead ends: 261 [2022-11-19 07:32:53,639 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 [2022-11-19 07:32:53,645 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 517 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:53,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 552 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:32:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-19 07:32:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-11-19 07:32:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 131 states have (on average 1.4809160305343512) internal successors, (194), 131 states have internal predecessors, (194), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 07:32:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 254 transitions. [2022-11-19 07:32:53,683 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 254 transitions. Word has length 31 [2022-11-19 07:32:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:53,684 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 254 transitions. [2022-11-19 07:32:53,684 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) [2022-11-19 07:32:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 254 transitions. [2022-11-19 07:32:53,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:32:53,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:53,686 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] [2022-11-19 07:32:53,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:32:53,686 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1610746453, now seen corresponding path program 1 times [2022-11-19 07:32:53,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:53,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407339818] [2022-11-19 07:32:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:53,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:53,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:53,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407339818] [2022-11-19 07:32:53,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407339818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:53,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:53,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:32:53,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007977133] [2022-11-19 07:32:53,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:53,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:53,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:53,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:53,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:32:53,867 INFO L87 Difference]: Start difference. First operand 170 states and 254 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) [2022-11-19 07:32:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:53,948 INFO L93 Difference]: Finished difference Result 316 states and 475 transitions. [2022-11-19 07:32:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:53,949 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 [2022-11-19 07:32:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:53,951 INFO L225 Difference]: With dead ends: 316 [2022-11-19 07:32:53,951 INFO L226 Difference]: Without dead ends: 175 [2022-11-19 07:32:53,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:32:53,963 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 6 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:53,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 605 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:32:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-19 07:32:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-19 07:32:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 135 states have (on average 1.4666666666666666) internal successors, (198), 135 states have internal predecessors, (198), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 07:32:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2022-11-19 07:32:53,988 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 33 [2022-11-19 07:32:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:53,989 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2022-11-19 07:32:53,989 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) [2022-11-19 07:32:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2022-11-19 07:32:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:32:53,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:53,996 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] [2022-11-19 07:32:53,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:32:53,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:53,997 INFO L85 PathProgramCache]: Analyzing trace with hash -693743727, now seen corresponding path program 1 times [2022-11-19 07:32:53,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:53,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675226647] [2022-11-19 07:32:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:54,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675226647] [2022-11-19 07:32:54,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675226647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:54,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:54,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:32:54,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015685414] [2022-11-19 07:32:54,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:54,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:54,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:54,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:32:54,177 INFO L87 Difference]: Start difference. First operand 175 states and 258 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) [2022-11-19 07:32:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:54,250 INFO L93 Difference]: Finished difference Result 326 states and 486 transitions. [2022-11-19 07:32:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:54,252 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 [2022-11-19 07:32:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:54,253 INFO L225 Difference]: With dead ends: 326 [2022-11-19 07:32:54,254 INFO L226 Difference]: Without dead ends: 180 [2022-11-19 07:32:54,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:32:54,255 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:54,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 591 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:32:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-19 07:32:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-19 07:32:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 139 states have (on average 1.4532374100719425) internal successors, (202), 139 states have internal predecessors, (202), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 07:32:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 262 transitions. [2022-11-19 07:32:54,274 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 262 transitions. Word has length 41 [2022-11-19 07:32:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:54,275 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 262 transitions. [2022-11-19 07:32:54,275 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) [2022-11-19 07:32:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 262 transitions. [2022-11-19 07:32:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:32:54,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:54,276 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] [2022-11-19 07:32:54,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:32:54,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:54,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1402099173, now seen corresponding path program 1 times [2022-11-19 07:32:54,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:54,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758623258] [2022-11-19 07:32:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:54,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:54,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758623258] [2022-11-19 07:32:54,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758623258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:54,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:54,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:32:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785650246] [2022-11-19 07:32:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:54,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:54,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:54,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:32:54,437 INFO L87 Difference]: Start difference. First operand 180 states and 262 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) [2022-11-19 07:32:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:54,537 INFO L93 Difference]: Finished difference Result 335 states and 490 transitions. [2022-11-19 07:32:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:54,537 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 [2022-11-19 07:32:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:54,539 INFO L225 Difference]: With dead ends: 335 [2022-11-19 07:32:54,539 INFO L226 Difference]: Without dead ends: 184 [2022-11-19 07:32:54,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:32:54,541 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:54,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 600 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:32:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-19 07:32:54,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-19 07:32:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.443661971830986) internal successors, (205), 142 states have internal predecessors, (205), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 07:32:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 265 transitions. [2022-11-19 07:32:54,561 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 265 transitions. Word has length 49 [2022-11-19 07:32:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:54,561 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 265 transitions. [2022-11-19 07:32:54,561 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) [2022-11-19 07:32:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 265 transitions. [2022-11-19 07:32:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:32:54,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:54,563 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] [2022-11-19 07:32:54,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:32:54,563 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash 994360130, now seen corresponding path program 1 times [2022-11-19 07:32:54,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:54,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582756827] [2022-11-19 07:32:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:54,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:54,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:54,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582756827] [2022-11-19 07:32:54,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582756827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:54,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:54,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:32:54,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933143562] [2022-11-19 07:32:54,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:54,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:54,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:32:54,752 INFO L87 Difference]: Start difference. First operand 184 states and 265 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) [2022-11-19 07:32:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:54,831 INFO L93 Difference]: Finished difference Result 344 states and 500 transitions. [2022-11-19 07:32:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:54,832 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 [2022-11-19 07:32:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:54,833 INFO L225 Difference]: With dead ends: 344 [2022-11-19 07:32:54,833 INFO L226 Difference]: Without dead ends: 189 [2022-11-19 07:32:54,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:32:54,834 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:54,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 591 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:32:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-19 07:32:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-19 07:32:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 146 states have (on average 1.4315068493150684) internal successors, (209), 146 states have internal predecessors, (209), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 07:32:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2022-11-19 07:32:54,852 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 49 [2022-11-19 07:32:54,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:54,853 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2022-11-19 07:32:54,853 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) [2022-11-19 07:32:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2022-11-19 07:32:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:32:54,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:54,854 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] [2022-11-19 07:32:54,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:32:54,854 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:54,855 INFO L85 PathProgramCache]: Analyzing trace with hash -837012826, now seen corresponding path program 1 times [2022-11-19 07:32:54,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:54,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830814614] [2022-11-19 07:32:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:54,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:32:55,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:55,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830814614] [2022-11-19 07:32:55,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830814614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:55,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:55,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:32:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451321996] [2022-11-19 07:32:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:55,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:55,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:32:55,094 INFO L87 Difference]: Start difference. First operand 189 states and 269 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) [2022-11-19 07:32:55,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:55,162 INFO L93 Difference]: Finished difference Result 355 states and 507 transitions. [2022-11-19 07:32:55,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:55,162 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 [2022-11-19 07:32:55,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:55,164 INFO L225 Difference]: With dead ends: 355 [2022-11-19 07:32:55,164 INFO L226 Difference]: Without dead ends: 195 [2022-11-19 07:32:55,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:32:55,165 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 7 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:55,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 602 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:32:55,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-19 07:32:55,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-11-19 07:32:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 151 states have (on average 1.4172185430463575) internal successors, (214), 151 states have internal predecessors, (214), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 07:32:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 274 transitions. [2022-11-19 07:32:55,182 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 274 transitions. Word has length 57 [2022-11-19 07:32:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:55,183 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 274 transitions. [2022-11-19 07:32:55,183 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) [2022-11-19 07:32:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 274 transitions. [2022-11-19 07:32:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:32:55,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:55,184 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] [2022-11-19 07:32:55,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:32:55,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:55,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1386269671, now seen corresponding path program 1 times [2022-11-19 07:32:55,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:55,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752588717] [2022-11-19 07:32:55,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:55,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:32:55,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:55,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752588717] [2022-11-19 07:32:55,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752588717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:55,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279312338] [2022-11-19 07:32:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:55,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:55,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:55,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:55,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:32:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:32:55,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:32:56,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:56,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279312338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:56,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:56,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-19 07:32:56,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890149915] [2022-11-19 07:32:56,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:56,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:32:56,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:56,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:32:56,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:32:56,120 INFO L87 Difference]: Start difference. First operand 195 states and 274 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) [2022-11-19 07:32:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:56,448 INFO L93 Difference]: Finished difference Result 566 states and 787 transitions. [2022-11-19 07:32:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:32:56,449 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 [2022-11-19 07:32:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:56,452 INFO L225 Difference]: With dead ends: 566 [2022-11-19 07:32:56,452 INFO L226 Difference]: Without dead ends: 374 [2022-11-19 07:32:56,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:32:56,455 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 217 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:56,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1098 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:32:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-19 07:32:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 371. [2022-11-19 07:32:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.407017543859649) internal successors, (401), 286 states have internal predecessors, (401), 59 states have call successors, (59), 26 states have call predecessors, (59), 26 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-19 07:32:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 519 transitions. [2022-11-19 07:32:56,502 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 519 transitions. Word has length 60 [2022-11-19 07:32:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:56,502 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 519 transitions. [2022-11-19 07:32:56,502 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) [2022-11-19 07:32:56,502 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 519 transitions. [2022-11-19 07:32:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:32:56,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:56,504 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] [2022-11-19 07:32:56,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:56,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:32:56,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1016926634, now seen corresponding path program 1 times [2022-11-19 07:32:56,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:56,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635710186] [2022-11-19 07:32:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:32:57,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:57,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635710186] [2022-11-19 07:32:57,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635710186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:57,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390967403] [2022-11-19 07:32:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:57,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:57,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:57,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:57,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:32:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:32:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:57,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:32:58,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390967403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:32:58,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216295871] [2022-11-19 07:32:58,085 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-19 07:32:58,085 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:32:58,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:32:58,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:32:58,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:33:02,525 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-19 07:33:02,564 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-19 07:33:02,594 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-19 07:33:02,673 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:33:21,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1216295871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:21,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:33:21,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-11-19 07:33:21,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816438933] [2022-11-19 07:33:21,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:21,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:33:21,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:33:21,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:33:21,445 INFO L87 Difference]: Start difference. First operand 371 states and 519 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) [2022-11-19 07:33:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:28,635 INFO L93 Difference]: Finished difference Result 802 states and 1132 transitions. [2022-11-19 07:33:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:33:28,636 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 [2022-11-19 07:33:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:28,640 INFO L225 Difference]: With dead ends: 802 [2022-11-19 07:33:28,640 INFO L226 Difference]: Without dead ends: 456 [2022-11-19 07:33:28,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:33:28,643 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 174 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:28,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 3311 Invalid, 2088 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-19 07:33:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-11-19 07:33:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 433. [2022-11-19 07:33:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 329 states have (on average 1.3799392097264438) internal successors, (454), 330 states have internal predecessors, (454), 74 states have call successors, (74), 29 states have call predecessors, (74), 29 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-19 07:33:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 602 transitions. [2022-11-19 07:33:28,721 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 602 transitions. Word has length 62 [2022-11-19 07:33:28,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:28,721 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 602 transitions. [2022-11-19 07:33:28,722 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) [2022-11-19 07:33:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 602 transitions. [2022-11-19 07:33:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:33:28,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:28,723 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] [2022-11-19 07:33:28,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:28,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:33:28,936 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:28,937 INFO L85 PathProgramCache]: Analyzing trace with hash -905474981, now seen corresponding path program 1 times [2022-11-19 07:33:28,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:28,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290526146] [2022-11-19 07:33:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:28,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:33:29,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290526146] [2022-11-19 07:33:29,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290526146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:29,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53266008] [2022-11-19 07:33:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:29,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:29,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:29,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:29,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:33:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:29,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:33:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:33:29,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:33:29,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53266008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:33:29,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697780526] [2022-11-19 07:33:29,942 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-19 07:33:29,942 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:33:29,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:33:29,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:33:29,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:33:32,221 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-19 07:33:32,245 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-19 07:33:32,266 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-19 07:33:32,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:33:48,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1697780526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:48,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:33:48,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-11-19 07:33:48,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171193856] [2022-11-19 07:33:48,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:48,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:33:48,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:48,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:33:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:33:48,972 INFO L87 Difference]: Start difference. First operand 433 states and 602 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) [2022-11-19 07:33:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:55,276 INFO L93 Difference]: Finished difference Result 845 states and 1187 transitions. [2022-11-19 07:33:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:33:55,277 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 [2022-11-19 07:33:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:55,279 INFO L225 Difference]: With dead ends: 845 [2022-11-19 07:33:55,280 INFO L226 Difference]: Without dead ends: 506 [2022-11-19 07:33:55,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:33:55,281 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 78 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:55,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 2955 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-19 07:33:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-19 07:33:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 483. [2022-11-19 07:33:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 362 states have (on average 1.3646408839779005) internal successors, (494), 363 states have internal predecessors, (494), 88 states have call successors, (88), 32 states have call predecessors, (88), 32 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2022-11-19 07:33:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 670 transitions. [2022-11-19 07:33:55,405 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 670 transitions. Word has length 62 [2022-11-19 07:33:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:55,406 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 670 transitions. [2022-11-19 07:33:55,406 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) [2022-11-19 07:33:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 670 transitions. [2022-11-19 07:33:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 07:33:55,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:55,407 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] [2022-11-19 07:33:55,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:55,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:55,608 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash 638152030, now seen corresponding path program 1 times [2022-11-19 07:33:55,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:55,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919812250] [2022-11-19 07:33:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:55,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:33:56,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919812250] [2022-11-19 07:33:56,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919812250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589894066] [2022-11-19 07:33:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:56,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:56,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:56,003 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:56,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:33:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:33:56,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:33:56,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:33:56,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589894066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:33:56,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [283175982] [2022-11-19 07:33:56,617 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-11-19 07:33:56,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:33:56,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:33:56,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:33:56,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:33:59,798 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-19 07:33:59,834 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-19 07:33:59,863 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-19 07:33:59,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:19,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [283175982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:19,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:34:19,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2022-11-19 07:34:19,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3121270] [2022-11-19 07:34:19,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:19,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:34:19,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:19,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:34:19,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:34:19,966 INFO L87 Difference]: Start difference. First operand 483 states and 670 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) [2022-11-19 07:34:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:27,064 INFO L93 Difference]: Finished difference Result 895 states and 1258 transitions. [2022-11-19 07:34:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 07:34:27,066 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 [2022-11-19 07:34:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:27,069 INFO L225 Difference]: With dead ends: 895 [2022-11-19 07:34:27,069 INFO L226 Difference]: Without dead ends: 556 [2022-11-19 07:34:27,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:34:27,071 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 154 mSDsluCounter, 3148 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:27,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 3447 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-19 07:34:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-19 07:34:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 507. [2022-11-19 07:34:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 378 states have (on average 1.3465608465608465) internal successors, (509), 379 states have internal predecessors, (509), 94 states have call successors, (94), 34 states have call predecessors, (94), 34 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-19 07:34:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 697 transitions. [2022-11-19 07:34:27,197 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 697 transitions. Word has length 64 [2022-11-19 07:34:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:27,198 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 697 transitions. [2022-11-19 07:34:27,198 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) [2022-11-19 07:34:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 697 transitions. [2022-11-19 07:34:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:34:27,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:27,200 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:27,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:27,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:27,406 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:27,406 INFO L85 PathProgramCache]: Analyzing trace with hash -213509607, now seen corresponding path program 1 times [2022-11-19 07:34:27,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:27,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454214155] [2022-11-19 07:34:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:34:27,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:27,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454214155] [2022-11-19 07:34:27,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454214155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:27,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:27,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:27,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078282225] [2022-11-19 07:34:27,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:27,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:27,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:27,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:27,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:27,540 INFO L87 Difference]: Start difference. First operand 507 states and 697 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) [2022-11-19 07:34:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:27,714 INFO L93 Difference]: Finished difference Result 906 states and 1272 transitions. [2022-11-19 07:34:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:34:27,715 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 [2022-11-19 07:34:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:27,718 INFO L225 Difference]: With dead ends: 906 [2022-11-19 07:34:27,718 INFO L226 Difference]: Without dead ends: 515 [2022-11-19 07:34:27,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:27,720 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:27,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 600 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:34:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-11-19 07:34:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2022-11-19 07:34:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 384 states have (on average 1.3411458333333333) internal successors, (515), 385 states have internal predecessors, (515), 94 states have call successors, (94), 36 states have call predecessors, (94), 36 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-19 07:34:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 703 transitions. [2022-11-19 07:34:27,867 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 703 transitions. Word has length 66 [2022-11-19 07:34:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:27,868 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 703 transitions. [2022-11-19 07:34:27,868 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) [2022-11-19 07:34:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 703 transitions. [2022-11-19 07:34:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:34:27,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:27,876 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] [2022-11-19 07:34:27,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:34:27,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:27,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash 670785818, now seen corresponding path program 1 times [2022-11-19 07:34:27,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:27,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188948826] [2022-11-19 07:34:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:27,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:34:28,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:28,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188948826] [2022-11-19 07:34:28,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188948826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:28,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679036955] [2022-11-19 07:34:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:28,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:28,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:28,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:28,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:34:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:28,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:34:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:28,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:34:28,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679036955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:28,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724773379] [2022-11-19 07:34:28,872 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-11-19 07:34:28,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:28,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:28,872 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:28,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:34,478 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-11-19 07:34:34,875 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-19 07:34:34,895 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 182 for LOIs [2022-11-19 07:34:35,063 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-11-19 07:34:35,108 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-19 07:34:35,156 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-19 07:34:35,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:27,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15790#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s2p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s2s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s1s1_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 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) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (not (= (mod ~side2Failed~0 256) 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) (= ~side1_written~0 1) (= ~s1s2~0 0) (= ~nomsg~0 ~s2p_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256))) ~s1s2_old~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) (= ~s1p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256)))) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~nomsg~0 ~side2_written~0) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (= ~nomsg~0 ~s2s2_new~0) (= (mod ~side1Failed~0 256) 0) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256))) ~s2s1_old~0) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:27,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:27,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:35:27,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-19 07:35:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084394000] [2022-11-19 07:35:27,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:27,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:35:27,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:35:27,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:35:27,076 INFO L87 Difference]: Start difference. First operand 515 states and 703 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) [2022-11-19 07:35:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:27,834 INFO L93 Difference]: Finished difference Result 1236 states and 1718 transitions. [2022-11-19 07:35:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:35:27,835 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 [2022-11-19 07:35:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:27,840 INFO L225 Difference]: With dead ends: 1236 [2022-11-19 07:35:27,840 INFO L226 Difference]: Without dead ends: 853 [2022-11-19 07:35:27,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=397, Invalid=3143, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:35:27,843 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 298 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:27,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 2369 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:35:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-11-19 07:35:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 532. [2022-11-19 07:35:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 394 states have (on average 1.2944162436548223) internal successors, (510), 396 states have internal predecessors, (510), 92 states have call successors, (92), 45 states have call predecessors, (92), 45 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-19 07:35:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 694 transitions. [2022-11-19 07:35:28,023 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 694 transitions. Word has length 70 [2022-11-19 07:35:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:28,024 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 694 transitions. [2022-11-19 07:35:28,024 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) [2022-11-19 07:35:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 694 transitions. [2022-11-19 07:35:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 07:35:28,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:28,027 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] [2022-11-19 07:35:28,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:28,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:35:28,233 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash -757200530, now seen corresponding path program 1 times [2022-11-19 07:35:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:28,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129621715] [2022-11-19 07:35:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:28,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:35:28,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129621715] [2022-11-19 07:35:28,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129621715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:28,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:28,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:35:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212445403] [2022-11-19 07:35:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:28,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:35:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:35:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:35:28,597 INFO L87 Difference]: Start difference. First operand 532 states and 694 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) [2022-11-19 07:35:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:29,507 INFO L93 Difference]: Finished difference Result 1170 states and 1609 transitions. [2022-11-19 07:35:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:35:29,508 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 [2022-11-19 07:35:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:29,512 INFO L225 Difference]: With dead ends: 1170 [2022-11-19 07:35:29,512 INFO L226 Difference]: Without dead ends: 876 [2022-11-19 07:35:29,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:35:29,514 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 530 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:29,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 2248 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:35:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-19 07:35:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 671. [2022-11-19 07:35:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 496 states have (on average 1.3064516129032258) internal successors, (648), 499 states have internal predecessors, (648), 116 states have call successors, (116), 58 states have call predecessors, (116), 58 states have return successors, (116), 113 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-19 07:35:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 880 transitions. [2022-11-19 07:35:29,721 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 880 transitions. Word has length 71 [2022-11-19 07:35:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:29,722 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 880 transitions. [2022-11-19 07:35:29,722 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) [2022-11-19 07:35:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 880 transitions. [2022-11-19 07:35:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:35:29,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:29,725 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] [2022-11-19 07:35:29,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:35:29,725 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash -99513804, now seen corresponding path program 1 times [2022-11-19 07:35:29,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:29,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976675323] [2022-11-19 07:35:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:29,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:35:30,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:30,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976675323] [2022-11-19 07:35:30,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976675323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:30,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:30,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:35:30,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990923313] [2022-11-19 07:35:30,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:30,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:35:30,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:30,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:35:30,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:35:30,035 INFO L87 Difference]: Start difference. First operand 671 states and 880 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) [2022-11-19 07:35:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:31,032 INFO L93 Difference]: Finished difference Result 1540 states and 2122 transitions. [2022-11-19 07:35:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:35:31,033 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 [2022-11-19 07:35:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:31,038 INFO L225 Difference]: With dead ends: 1540 [2022-11-19 07:35:31,038 INFO L226 Difference]: Without dead ends: 1211 [2022-11-19 07:35:31,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:35:31,040 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 746 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:31,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 1389 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:35:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-11-19 07:35:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 927. [2022-11-19 07:35:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 679 states have (on average 1.3136966126656848) internal successors, (892), 684 states have internal predecessors, (892), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-11-19 07:35:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1222 transitions. [2022-11-19 07:35:31,318 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1222 transitions. Word has length 73 [2022-11-19 07:35:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:31,318 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1222 transitions. [2022-11-19 07:35:31,319 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) [2022-11-19 07:35:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1222 transitions. [2022-11-19 07:35:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-19 07:35:31,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:31,320 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] [2022-11-19 07:35:31,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:35:31,321 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:31,321 INFO L85 PathProgramCache]: Analyzing trace with hash -837446945, now seen corresponding path program 1 times [2022-11-19 07:35:31,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:31,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347309885] [2022-11-19 07:35:31,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:31,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:35:31,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:31,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347309885] [2022-11-19 07:35:31,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347309885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:31,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145747557] [2022-11-19 07:35:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:31,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:31,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:31,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:31,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:35:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:35:31,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:35:31,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:35:31,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145747557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:31,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:35:31,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 07:35:31,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216532372] [2022-11-19 07:35:31,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:31,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:35:31,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:31,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:35:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:35:31,935 INFO L87 Difference]: Start difference. First operand 927 states and 1222 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) [2022-11-19 07:35:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:32,762 INFO L93 Difference]: Finished difference Result 1783 states and 2415 transitions. [2022-11-19 07:35:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:35:32,763 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 [2022-11-19 07:35:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:32,769 INFO L225 Difference]: With dead ends: 1783 [2022-11-19 07:35:32,769 INFO L226 Difference]: Without dead ends: 1090 [2022-11-19 07:35:32,771 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 [2022-11-19 07:35:32,772 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 486 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:32,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1561 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:35:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-11-19 07:35:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 927. [2022-11-19 07:35:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 679 states have (on average 1.3078055964653903) internal successors, (888), 684 states have internal predecessors, (888), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-11-19 07:35:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1218 transitions. [2022-11-19 07:35:33,074 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1218 transitions. Word has length 77 [2022-11-19 07:35:33,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:33,074 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1218 transitions. [2022-11-19 07:35:33,075 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) [2022-11-19 07:35:33,075 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1218 transitions. [2022-11-19 07:35:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-19 07:35:33,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:33,076 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] [2022-11-19 07:35:33,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:33,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:35:33,282 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash -117293042, now seen corresponding path program 1 times [2022-11-19 07:35:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:33,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471700234] [2022-11-19 07:35:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:35:33,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:33,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471700234] [2022-11-19 07:35:33,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471700234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:33,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484365832] [2022-11-19 07:35:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:33,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:33,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:33,707 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:33,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:35:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:33,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:35:33,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:35:33,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:35:34,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484365832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337064689] [2022-11-19 07:35:34,094 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-19 07:35:34,094 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:34,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:34,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:34,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:37,985 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-19 07:35:38,014 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-19 07:35:38,032 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-19 07:35:38,109 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-19 07:35:38,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:09,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1337064689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:09,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:36:09,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-11-19 07:36:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203857982] [2022-11-19 07:36:09,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:09,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:36:09,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:09,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:36:09,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:36:09,104 INFO L87 Difference]: Start difference. First operand 927 states and 1218 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) [2022-11-19 07:36:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:16,979 INFO L93 Difference]: Finished difference Result 1489 states and 1977 transitions. [2022-11-19 07:36:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 07:36:16,980 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 [2022-11-19 07:36:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:16,984 INFO L225 Difference]: With dead ends: 1489 [2022-11-19 07:36:16,984 INFO L226 Difference]: Without dead ends: 913 [2022-11-19 07:36:16,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 07:36:16,987 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 172 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:16,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 3013 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-19 07:36:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-19 07:36:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2022-11-19 07:36:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 669 states have (on average 1.3064275037369208) internal successors, (874), 674 states have internal predecessors, (874), 162 states have call successors, (162), 81 states have call predecessors, (162), 81 states have return successors, (162), 157 states have call predecessors, (162), 162 states have call successors, (162) [2022-11-19 07:36:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1198 transitions. [2022-11-19 07:36:17,259 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1198 transitions. Word has length 77 [2022-11-19 07:36:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:17,260 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1198 transitions. [2022-11-19 07:36:17,260 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) [2022-11-19 07:36:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1198 transitions. [2022-11-19 07:36:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 07:36:17,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:17,265 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] [2022-11-19 07:36:17,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:17,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:36:17,480 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:17,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:17,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2012814036, now seen corresponding path program 1 times [2022-11-19 07:36:17,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:17,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245876234] [2022-11-19 07:36:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:17,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:36:17,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:17,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245876234] [2022-11-19 07:36:17,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245876234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:17,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:17,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:36:17,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218904339] [2022-11-19 07:36:17,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:17,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:36:17,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:17,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:36:17,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:36:17,713 INFO L87 Difference]: Start difference. First operand 913 states and 1198 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) [2022-11-19 07:36:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:18,201 INFO L93 Difference]: Finished difference Result 1201 states and 1645 transitions. [2022-11-19 07:36:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:18,202 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 [2022-11-19 07:36:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:18,207 INFO L225 Difference]: With dead ends: 1201 [2022-11-19 07:36:18,207 INFO L226 Difference]: Without dead ends: 1199 [2022-11-19 07:36:18,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:36:18,209 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 155 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:18,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1465 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:36:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-11-19 07:36:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 914. [2022-11-19 07:36:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 668 states have (on average 1.3068862275449102) internal successors, (873), 674 states have internal predecessors, (873), 163 states have call successors, (163), 82 states have call predecessors, (163), 82 states have return successors, (163), 157 states have call predecessors, (163), 163 states have call successors, (163) [2022-11-19 07:36:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1199 transitions. [2022-11-19 07:36:18,495 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1199 transitions. Word has length 80 [2022-11-19 07:36:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:18,496 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1199 transitions. [2022-11-19 07:36:18,496 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) [2022-11-19 07:36:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1199 transitions. [2022-11-19 07:36:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-19 07:36:18,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:18,498 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] [2022-11-19 07:36:18,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 07:36:18,498 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:18,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash 786573589, now seen corresponding path program 1 times [2022-11-19 07:36:18,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:18,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294322371] [2022-11-19 07:36:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:18,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:36:18,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:18,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294322371] [2022-11-19 07:36:18,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294322371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:18,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:18,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:36:18,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867259043] [2022-11-19 07:36:18,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:18,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:36:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:18,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:36:18,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:36:18,677 INFO L87 Difference]: Start difference. First operand 914 states and 1199 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) [2022-11-19 07:36:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:18,989 INFO L93 Difference]: Finished difference Result 1566 states and 2070 transitions. [2022-11-19 07:36:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:36:18,989 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 [2022-11-19 07:36:18,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:18,993 INFO L225 Difference]: With dead ends: 1566 [2022-11-19 07:36:18,993 INFO L226 Difference]: Without dead ends: 902 [2022-11-19 07:36:18,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:36:18,996 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 7 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:18,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 592 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:36:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-19 07:36:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 902. [2022-11-19 07:36:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 662 states have (on average 1.2824773413897281) internal successors, (849), 668 states have internal predecessors, (849), 157 states have call successors, (157), 82 states have call predecessors, (157), 82 states have return successors, (157), 151 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-19 07:36:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1163 transitions. [2022-11-19 07:36:19,280 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1163 transitions. Word has length 83 [2022-11-19 07:36:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:19,281 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1163 transitions. [2022-11-19 07:36:19,281 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) [2022-11-19 07:36:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1163 transitions. [2022-11-19 07:36:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-19 07:36:19,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:19,283 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] [2022-11-19 07:36:19,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 07:36:19,283 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:19,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1870460879, now seen corresponding path program 1 times [2022-11-19 07:36:19,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:19,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781734079] [2022-11-19 07:36:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:19,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:36:19,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:19,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781734079] [2022-11-19 07:36:19,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781734079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:19,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487157737] [2022-11-19 07:36:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:19,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:19,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:19,636 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:19,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:36:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:36:19,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:36:19,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:36:20,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487157737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:20,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897101546] [2022-11-19 07:36:20,064 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-19 07:36:20,064 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:36:20,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:36:20,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:36:20,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:36:23,742 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-19 07:36:23,765 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-19 07:36:23,781 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-19 07:36:23,878 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 152 for LOIs [2022-11-19 07:36:23,924 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-19 07:36:23,972 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:37:04,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1897101546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:04,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:37:04,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-19 07:37:04,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413288179] [2022-11-19 07:37:04,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:04,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 07:37:04,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 07:37:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:37:04,239 INFO L87 Difference]: Start difference. First operand 902 states and 1163 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) [2022-11-19 07:37:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:15,852 INFO L93 Difference]: Finished difference Result 1515 states and 1985 transitions. [2022-11-19 07:37:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-19 07:37:15,853 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 [2022-11-19 07:37:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:15,857 INFO L225 Difference]: With dead ends: 1515 [2022-11-19 07:37:15,857 INFO L226 Difference]: Without dead ends: 944 [2022-11-19 07:37:15,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 07:37:15,860 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 261 mSDsluCounter, 4256 mSDsCounter, 0 mSdLazyCounter, 3768 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 4520 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:15,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 4520 Invalid, 3835 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 3768 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-19 07:37:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-11-19 07:37:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 905. [2022-11-19 07:37:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 664 states have (on average 1.2816265060240963) internal successors, (851), 670 states have internal predecessors, (851), 158 states have call successors, (158), 82 states have call predecessors, (158), 82 states have return successors, (158), 152 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-19 07:37:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1167 transitions. [2022-11-19 07:37:16,110 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1167 transitions. Word has length 85 [2022-11-19 07:37:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:16,110 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1167 transitions. [2022-11-19 07:37:16,111 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) [2022-11-19 07:37:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1167 transitions. [2022-11-19 07:37:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-19 07:37:16,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:16,113 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] [2022-11-19 07:37:16,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 07:37:16,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 07:37:16,323 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash -644472428, now seen corresponding path program 1 times [2022-11-19 07:37:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:16,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520572998] [2022-11-19 07:37:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:16,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:37:16,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:16,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520572998] [2022-11-19 07:37:16,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520572998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:37:16,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228534334] [2022-11-19 07:37:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:16,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:16,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:37:16,712 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:37:16,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:37:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:37:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:37:17,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:37:17,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228534334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:37:17,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089199156] [2022-11-19 07:37:17,295 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-19 07:37:17,296 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:37:17,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:37:17,297 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:37:17,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:37:21,258 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 241 for LOIs [2022-11-19 07:37:21,458 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-19 07:37:21,474 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-11-19 07:37:21,571 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 157 for LOIs [2022-11-19 07:37:21,607 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-11-19 07:37:21,653 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-19 07:37:21,708 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:38:16,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41524#(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 [2022-11-19 07:38:16,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:38:16,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:38:16,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-19 07:38:16,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35485918] [2022-11-19 07:38:16,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:38:16,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:38:16,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:38:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=3149, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:38:16,130 INFO L87 Difference]: Start difference. First operand 905 states and 1167 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, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-19 07:38:17,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:17,012 INFO L93 Difference]: Finished difference Result 1858 states and 2462 transitions. [2022-11-19 07:38:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:38:17,013 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, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 85 [2022-11-19 07:38:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:17,019 INFO L225 Difference]: With dead ends: 1858 [2022-11-19 07:38:17,019 INFO L226 Difference]: Without dead ends: 1131 [2022-11-19 07:38:17,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 189 SyntacticMatches, 15 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=439, Invalid=3721, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 07:38:17,022 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 222 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:17,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 3107 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:38:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-11-19 07:38:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 884. [2022-11-19 07:38:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 649 states have (on average 1.2742681047765794) internal successors, (827), 655 states have internal predecessors, (827), 152 states have call successors, (152), 82 states have call predecessors, (152), 82 states have return successors, (152), 146 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-19 07:38:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1131 transitions. [2022-11-19 07:38:17,245 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1131 transitions. Word has length 85 [2022-11-19 07:38:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:17,246 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1131 transitions. [2022-11-19 07:38:17,246 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, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-19 07:38:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1131 transitions. [2022-11-19 07:38:17,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:38:17,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:17,248 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] [2022-11-19 07:38:17,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:17,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 07:38:17,454 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:17,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1802678683, now seen corresponding path program 1 times [2022-11-19 07:38:17,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:17,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292759893] [2022-11-19 07:38:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:17,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:38:17,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292759893] [2022-11-19 07:38:17,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292759893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486455499] [2022-11-19 07:38:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:17,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:17,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:17,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:17,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:38:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:38:17,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:38:18,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:38:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:38:18,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486455499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:38:18,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43971385] [2022-11-19 07:38:18,227 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 07:38:18,227 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:38:18,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:38:18,227 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:38:18,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:38:21,539 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-19 07:38:21,563 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-19 07:38:21,582 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-11-19 07:38:21,658 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-19 07:38:21,709 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-19 07:38:21,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:39:06,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [43971385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:06,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:39:06,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-11-19 07:39:06,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998740744] [2022-11-19 07:39:06,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:06,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 07:39:06,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:06,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 07:39:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2722, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:39:06,053 INFO L87 Difference]: Start difference. First operand 884 states and 1131 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) [2022-11-19 07:39:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:18,555 INFO L93 Difference]: Finished difference Result 1479 states and 1926 transitions. [2022-11-19 07:39:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-19 07:39:18,555 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 [2022-11-19 07:39:18,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:18,560 INFO L225 Difference]: With dead ends: 1479 [2022-11-19 07:39:18,560 INFO L226 Difference]: Without dead ends: 919 [2022-11-19 07:39:18,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 203 SyntacticMatches, 14 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=265, Invalid=2927, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 07:39:18,561 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 184 mSDsluCounter, 4705 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 4999 SdHoareTripleChecker+Invalid, 3747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:18,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 4999 Invalid, 3747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [53 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-19 07:39:18,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-11-19 07:39:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 887. [2022-11-19 07:39:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 651 states have (on average 1.273425499231951) internal successors, (829), 657 states have internal predecessors, (829), 153 states have call successors, (153), 82 states have call predecessors, (153), 82 states have return successors, (153), 147 states have call predecessors, (153), 153 states have call successors, (153) [2022-11-19 07:39:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1135 transitions. [2022-11-19 07:39:18,773 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1135 transitions. Word has length 87 [2022-11-19 07:39:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:18,774 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1135 transitions. [2022-11-19 07:39:18,774 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) [2022-11-19 07:39:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1135 transitions. [2022-11-19 07:39:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-19 07:39:18,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:18,776 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] [2022-11-19 07:39:18,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:18,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:39:18,982 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash -761547315, now seen corresponding path program 1 times [2022-11-19 07:39:18,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:18,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350221488] [2022-11-19 07:39:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:18,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:39:19,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:19,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350221488] [2022-11-19 07:39:19,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350221488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:19,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431576851] [2022-11-19 07:39:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:19,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:19,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:19,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:19,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:39:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:19,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:39:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:39:19,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:39:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:39:19,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431576851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:39:19,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [223796188] [2022-11-19 07:39:19,742 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 07:39:19,742 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:39:19,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:39:19,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:39:19,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:39:23,449 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-19 07:39:23,472 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-19 07:39:23,489 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-19 07:39:23,590 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-11-19 07:39:23,969 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-19 07:39:24,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:12,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [223796188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:40:12,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:40:12,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-11-19 07:40:12,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672442309] [2022-11-19 07:40:12,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:40:12,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:40:12,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:12,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:40:12,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:40:12,525 INFO L87 Difference]: Start difference. First operand 887 states and 1135 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) [2022-11-19 07:40:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:24,046 INFO L93 Difference]: Finished difference Result 1469 states and 1909 transitions. [2022-11-19 07:40:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 07:40:24,046 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 [2022-11-19 07:40:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:24,050 INFO L225 Difference]: With dead ends: 1469 [2022-11-19 07:40:24,050 INFO L226 Difference]: Without dead ends: 909 [2022-11-19 07:40:24,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 07:40:24,052 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 175 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 3488 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 3967 SdHoareTripleChecker+Invalid, 3540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:24,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 3967 Invalid, 3540 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 3488 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-11-19 07:40:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-19 07:40:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 874. [2022-11-19 07:40:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 642 states have (on average 1.2710280373831775) internal successors, (816), 648 states have internal predecessors, (816), 149 states have call successors, (149), 82 states have call predecessors, (149), 82 states have return successors, (149), 143 states have call predecessors, (149), 149 states have call successors, (149) [2022-11-19 07:40:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1114 transitions. [2022-11-19 07:40:24,251 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1114 transitions. Word has length 92 [2022-11-19 07:40:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:24,251 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1114 transitions. [2022-11-19 07:40:24,251 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) [2022-11-19 07:40:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1114 transitions. [2022-11-19 07:40:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-19 07:40:24,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:24,253 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] [2022-11-19 07:40:24,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:40:24,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 07:40:24,459 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:24,460 INFO L85 PathProgramCache]: Analyzing trace with hash -778050491, now seen corresponding path program 1 times [2022-11-19 07:40:24,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:24,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736327579] [2022-11-19 07:40:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:24,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 07:40:24,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:24,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736327579] [2022-11-19 07:40:24,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736327579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:40:24,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:40:24,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:40:24,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213374765] [2022-11-19 07:40:24,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:40:24,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:40:24,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:24,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:40:24,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:40:24,646 INFO L87 Difference]: Start difference. First operand 874 states and 1114 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) [2022-11-19 07:40:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:25,008 INFO L93 Difference]: Finished difference Result 1487 states and 1919 transitions. [2022-11-19 07:40:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:40:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (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 [2022-11-19 07:40:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:25,014 INFO L225 Difference]: With dead ends: 1487 [2022-11-19 07:40:25,015 INFO L226 Difference]: Without dead ends: 862 [2022-11-19 07:40:25,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:40:25,017 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 7 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:25,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 574 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:40:25,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-11-19 07:40:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2022-11-19 07:40:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 636 states have (on average 1.2452830188679245) internal successors, (792), 642 states have internal predecessors, (792), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-11-19 07:40:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1078 transitions. [2022-11-19 07:40:25,320 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1078 transitions. Word has length 92 [2022-11-19 07:40:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:25,326 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1078 transitions. [2022-11-19 07:40:25,328 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) [2022-11-19 07:40:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1078 transitions. [2022-11-19 07:40:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 07:40:25,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:25,333 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] [2022-11-19 07:40:25,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 07:40:25,334 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash -370958719, now seen corresponding path program 1 times [2022-11-19 07:40:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:25,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075696123] [2022-11-19 07:40:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:25,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:40:25,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:25,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075696123] [2022-11-19 07:40:25,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075696123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:25,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997760208] [2022-11-19 07:40:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:25,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:25,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:25,699 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:40:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:25,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:40:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:40:25,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:40:26,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997760208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:26,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038161710] [2022-11-19 07:40:26,121 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-19 07:40:26,122 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:26,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:26,122 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:26,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:29,325 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-19 07:40:29,349 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-19 07:40:29,370 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-11-19 07:40:29,729 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 193 for LOIs [2022-11-19 07:40:30,091 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-19 07:40:30,135 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:19,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1038161710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:41:19,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:19,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-11-19 07:41:19,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200136542] [2022-11-19 07:41:19,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:41:19,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:41:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:19,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:41:19,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:41:19,819 INFO L87 Difference]: Start difference. First operand 862 states and 1078 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) [2022-11-19 07:41:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:33,510 INFO L93 Difference]: Finished difference Result 1449 states and 1849 transitions. [2022-11-19 07:41:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 07:41:33,511 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 [2022-11-19 07:41:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:33,515 INFO L225 Difference]: With dead ends: 1449 [2022-11-19 07:41:33,515 INFO L226 Difference]: Without dead ends: 894 [2022-11-19 07:41:33,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 225 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 50.9s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 07:41:33,517 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 153 mSDsluCounter, 4888 mSDsCounter, 0 mSdLazyCounter, 4151 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 5172 SdHoareTripleChecker+Invalid, 4188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:33,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 5172 Invalid, 4188 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 4151 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-11-19 07:41:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-19 07:41:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 862. [2022-11-19 07:41:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 636 states have (on average 1.2437106918238994) internal successors, (791), 642 states have internal predecessors, (791), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-11-19 07:41:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1077 transitions. [2022-11-19 07:41:33,727 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1077 transitions. Word has length 94 [2022-11-19 07:41:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:33,727 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1077 transitions. [2022-11-19 07:41:33,727 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) [2022-11-19 07:41:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1077 transitions. [2022-11-19 07:41:33,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 07:41:33,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:33,729 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] [2022-11-19 07:41:33,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:33,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:41:33,929 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:33,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:33,930 INFO L85 PathProgramCache]: Analyzing trace with hash 501826894, now seen corresponding path program 1 times [2022-11-19 07:41:33,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:33,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749286450] [2022-11-19 07:41:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:33,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:41:34,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749286450] [2022-11-19 07:41:34,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749286450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074091532] [2022-11-19 07:41:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:34,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:34,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:34,240 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:34,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:41:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:34,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:41:34,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:41:34,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:41:34,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074091532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:34,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [158852801] [2022-11-19 07:41:34,661 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-19 07:41:34,662 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:34,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:34,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:34,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:38,699 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-19 07:41:38,723 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-19 07:41:38,744 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-11-19 07:41:38,839 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-11-19 07:41:39,206 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-19 07:41:39,252 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:31,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [158852801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:42:31,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:42:31,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2022-11-19 07:42:31,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369006476] [2022-11-19 07:42:31,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:42:31,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-19 07:42:31,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:31,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-19 07:42:31,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:42:31,512 INFO L87 Difference]: Start difference. First operand 862 states and 1077 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) [2022-11-19 07:42:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:44,890 INFO L93 Difference]: Finished difference Result 1436 states and 1827 transitions. [2022-11-19 07:42:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-19 07:42:44,890 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 [2022-11-19 07:42:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:44,894 INFO L225 Difference]: With dead ends: 1436 [2022-11-19 07:42:44,894 INFO L226 Difference]: Without dead ends: 884 [2022-11-19 07:42:44,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:42:44,897 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 259 mSDsluCounter, 4621 mSDsCounter, 0 mSdLazyCounter, 4021 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 4881 SdHoareTripleChecker+Invalid, 4101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 4021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:44,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 4881 Invalid, 4101 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 4021 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-11-19 07:42:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-19 07:42:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 849. [2022-11-19 07:42:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 627 states have (on average 1.240829346092504) internal successors, (778), 633 states have internal predecessors, (778), 139 states have call successors, (139), 82 states have call predecessors, (139), 82 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2022-11-19 07:42:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1056 transitions. [2022-11-19 07:42:45,132 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1056 transitions. Word has length 98 [2022-11-19 07:42:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:45,133 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1056 transitions. [2022-11-19 07:42:45,133 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) [2022-11-19 07:42:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1056 transitions. [2022-11-19 07:42:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:42:45,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:45,135 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] [2022-11-19 07:42:45,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:45,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:42:45,341 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1809514280, now seen corresponding path program 1 times [2022-11-19 07:42:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:45,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907753941] [2022-11-19 07:42:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 07:42:45,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:45,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907753941] [2022-11-19 07:42:45,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907753941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:42:45,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:42:45,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:42:45,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129997575] [2022-11-19 07:42:45,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:42:45,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:42:45,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:45,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:42:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:42:45,518 INFO L87 Difference]: Start difference. First operand 849 states and 1056 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) [2022-11-19 07:42:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:45,794 INFO L93 Difference]: Finished difference Result 1402 states and 1774 transitions. [2022-11-19 07:42:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:42:45,794 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 [2022-11-19 07:42:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:45,798 INFO L225 Difference]: With dead ends: 1402 [2022-11-19 07:42:45,798 INFO L226 Difference]: Without dead ends: 837 [2022-11-19 07:42:45,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:42:45,800 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 7 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:45,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 562 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:42:45,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-19 07:42:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 787. [2022-11-19 07:42:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 585 states have (on average 1.2068376068376068) internal successors, (706), 591 states have internal predecessors, (706), 125 states have call successors, (125), 76 states have call predecessors, (125), 76 states have return successors, (125), 119 states have call predecessors, (125), 125 states have call successors, (125) [2022-11-19 07:42:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 956 transitions. [2022-11-19 07:42:46,040 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 956 transitions. Word has length 108 [2022-11-19 07:42:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:46,041 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 956 transitions. [2022-11-19 07:42:46,041 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) [2022-11-19 07:42:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 956 transitions. [2022-11-19 07:42:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:42:46,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:46,043 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] [2022-11-19 07:42:46,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-19 07:42:46,044 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash -993728657, now seen corresponding path program 1 times [2022-11-19 07:42:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:46,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457472996] [2022-11-19 07:42:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:46,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-19 07:42:46,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:46,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457472996] [2022-11-19 07:42:46,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457472996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:42:46,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:42:46,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:42:46,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854977126] [2022-11-19 07:42:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:42:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:42:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:42:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:42:46,221 INFO L87 Difference]: Start difference. First operand 787 states and 956 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) [2022-11-19 07:42:46,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:46,471 INFO L93 Difference]: Finished difference Result 1245 states and 1545 transitions. [2022-11-19 07:42:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:42:46,472 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 [2022-11-19 07:42:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:46,476 INFO L225 Difference]: With dead ends: 1245 [2022-11-19 07:42:46,476 INFO L226 Difference]: Without dead ends: 775 [2022-11-19 07:42:46,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:42:46,478 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 6 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:46,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 553 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:42:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-11-19 07:42:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 751. [2022-11-19 07:42:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 559 states have (on average 1.184257602862254) internal successors, (662), 565 states have internal predecessors, (662), 118 states have call successors, (118), 73 states have call predecessors, (118), 73 states have return successors, (118), 112 states have call predecessors, (118), 118 states have call successors, (118) [2022-11-19 07:42:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 898 transitions. [2022-11-19 07:42:46,678 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 898 transitions. Word has length 124 [2022-11-19 07:42:46,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:46,679 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 898 transitions. [2022-11-19 07:42:46,679 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) [2022-11-19 07:42:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 898 transitions. [2022-11-19 07:42:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-19 07:42:46,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:46,682 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] [2022-11-19 07:42:46,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-19 07:42:46,682 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:46,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:46,682 INFO L85 PathProgramCache]: Analyzing trace with hash 711856186, now seen corresponding path program 1 times [2022-11-19 07:42:46,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:46,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144742445] [2022-11-19 07:42:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:46,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 07:42:47,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144742445] [2022-11-19 07:42:47,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144742445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699982974] [2022-11-19 07:42:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:42:47,055 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:42:47,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:42:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:42:47,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:42:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:42:47,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:42:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-19 07:42:47,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699982974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:42:47,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [295224169] [2022-11-19 07:42:47,474 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-19 07:42:47,474 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:42:47,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:42:47,475 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:42:47,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:55,070 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-11-19 07:42:55,220 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-19 07:42:55,245 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-19 07:42:55,356 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-11-19 07:42:55,390 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-11-19 07:42:55,807 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 194 for LOIs [2022-11-19 07:42:56,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:00,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69096#(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) (= (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) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 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)))) (= (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) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:00,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:00,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:00,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-11-19 07:44:00,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836836109] [2022-11-19 07:44:00,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:00,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:44:00,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:44:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 07:44:00,936 INFO L87 Difference]: Start difference. First operand 751 states and 898 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) [2022-11-19 07:44:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:02,147 INFO L93 Difference]: Finished difference Result 1983 states and 2516 transitions. [2022-11-19 07:44:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:44:02,148 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 [2022-11-19 07:44:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:02,154 INFO L225 Difference]: With dead ends: 1983 [2022-11-19 07:44:02,155 INFO L226 Difference]: Without dead ends: 1399 [2022-11-19 07:44:02,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-11-19 07:44:02,158 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 485 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:02,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 1929 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:44:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-11-19 07:44:02,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1054. [2022-11-19 07:44:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 781 states have (on average 1.17797695262484) internal successors, (920), 790 states have internal predecessors, (920), 166 states have call successors, (166), 106 states have call predecessors, (166), 106 states have return successors, (166), 157 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-19 07:44:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1252 transitions. [2022-11-19 07:44:02,501 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1252 transitions. Word has length 134 [2022-11-19 07:44:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:02,501 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1252 transitions. [2022-11-19 07:44:02,502 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) [2022-11-19 07:44:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1252 transitions. [2022-11-19 07:44:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:44:02,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:02,504 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] [2022-11-19 07:44:02,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-19 07:44:02,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:02,710 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1461184554, now seen corresponding path program 1 times [2022-11-19 07:44:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949830237] [2022-11-19 07:44:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:02,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-19 07:44:05,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:05,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949830237] [2022-11-19 07:44:05,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949830237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:05,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114224255] [2022-11-19 07:44:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:05,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:05,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:05,656 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:05,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:44:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:05,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:44:05,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:44:06,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-19 07:44:07,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114224255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:07,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930021836] [2022-11-19 07:44:07,533 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-11-19 07:44:07,533 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:07,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:07,533 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:07,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:16,592 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 92 for LOIs [2022-11-19 07:44:16,721 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-19 07:44:16,737 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-19 07:44:16,857 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 152 for LOIs [2022-11-19 07:44:16,894 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 123 for LOIs [2022-11-19 07:44:17,014 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 197 for LOIs [2022-11-19 07:44:17,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:41,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74011#(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 [2022-11-19 07:45:41,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:45:41,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:41,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-11-19 07:45:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922859132] [2022-11-19 07:45:41,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:45:41,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 07:45:41,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:41,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 07:45:41,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2022-11-19 07:45:41,866 INFO L87 Difference]: Start difference. First operand 1054 states and 1252 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) [2022-11-19 07:45:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:49,772 INFO L93 Difference]: Finished difference Result 2558 states and 3339 transitions. [2022-11-19 07:45:49,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-19 07:45:49,773 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 [2022-11-19 07:45:49,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:49,783 INFO L225 Difference]: With dead ends: 2558 [2022-11-19 07:45:49,783 INFO L226 Difference]: Without dead ends: 1713 [2022-11-19 07:45:49,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 330 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 88.2s TimeCoverageRelationStatistics Valid=2492, Invalid=16414, Unknown=0, NotChecked=0, Total=18906 [2022-11-19 07:45:49,788 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 1134 mSDsluCounter, 12440 mSDsCounter, 0 mSdLazyCounter, 5639 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 12864 SdHoareTripleChecker+Invalid, 5954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 5639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:49,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 12864 Invalid, 5954 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [315 Valid, 5639 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-19 07:45:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-11-19 07:45:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 981. [2022-11-19 07:45:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 732 states have (on average 1.1967213114754098) internal successors, (876), 743 states have internal predecessors, (876), 151 states have call successors, (151), 97 states have call predecessors, (151), 97 states have return successors, (151), 140 states have call predecessors, (151), 151 states have call successors, (151) [2022-11-19 07:45:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1178 transitions. [2022-11-19 07:45:50,149 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1178 transitions. Word has length 142 [2022-11-19 07:45:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:50,150 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1178 transitions. [2022-11-19 07:45:50,150 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) [2022-11-19 07:45:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1178 transitions. [2022-11-19 07:45:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:45:50,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:50,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:50,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:45:50,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:50,352 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1374833708, now seen corresponding path program 1 times [2022-11-19 07:45:50,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:50,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199887948] [2022-11-19 07:45:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:50,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-19 07:45:51,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:51,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199887948] [2022-11-19 07:45:51,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199887948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:51,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177119693] [2022-11-19 07:45:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:51,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:51,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:51,350 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:51,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0ec8366-274b-4099-849d-72bad00d0cbf/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:45:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:51,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 07:45:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 67 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:45:52,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-19 07:45:52,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177119693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586614719] [2022-11-19 07:45:52,982 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-19 07:45:52,982 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:52,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:52,983 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:52,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:17,317 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 84 for LOIs [2022-11-19 07:46:17,383 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-19 07:46:17,389 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 116 for LOIs [2022-11-19 07:46:17,478 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 104 for LOIs [2022-11-19 07:46:17,566 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 119 for LOIs [2022-11-19 07:46:17,619 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 86 for LOIs [2022-11-19 07:46:17,638 INFO L180 IcfgInterpreter]: Interpretation finished