./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba --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 6167950643e67727b303c7b99fc0839aa2067301d926538b67f3f160c480440e --- 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-b5237d8 [2022-11-22 00:06:42,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:06:42,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:06:42,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:06:42,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:06:42,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:06:42,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:06:42,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:06:42,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:06:42,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:06:42,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:06:42,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:06:42,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:06:42,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:06:42,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:06:42,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:06:42,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:06:42,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:06:42,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:06:42,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:06:42,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:06:42,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:06:42,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:06:42,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:06:42,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:06:42,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:06:42,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:06:42,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:06:42,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:06:42,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:06:42,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:06:42,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:06:42,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:06:42,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:06:42,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:06:42,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:06:42,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:06:42,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:06:42,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:06:42,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:06:42,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:06:42,248 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:06:42,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:06:42,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:06:42,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:06:42,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:06:42,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:06:42,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:06:42,288 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:06:42,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:06:42,289 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:06:42,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:06:42,290 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:06:42,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:06:42,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:06:42,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:06:42,290 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:06:42,291 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:06:42,291 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:06:42,291 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:06:42,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:06:42,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:06:42,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:06:42,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:06:42,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:06:42,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:06:42,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:06:42,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:06:42,294 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:06:42,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:06:42,294 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:06:42,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:06:42,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:06:42,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:06:42,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:06:42,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:06:42,295 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:06:42,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:06:42,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:06:42,296 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:06:42,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:06:42,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:06:42,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:06:42,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6167950643e67727b303c7b99fc0839aa2067301d926538b67f3f160c480440e [2022-11-22 00:06:42,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:06:42,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:06:42,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:06:42,621 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:06:42,621 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:06:42,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c [2022-11-22 00:06:45,678 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:06:46,504 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:06:46,504 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c [2022-11-22 00:06:46,551 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/data/e0f4ae1a2/20802daa3d6542cda3e4d7908a9eee99/FLAGbe919e997 [2022-11-22 00:06:46,576 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/data/e0f4ae1a2/20802daa3d6542cda3e4d7908a9eee99 [2022-11-22 00:06:46,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:06:46,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:06:46,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:06:46,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:06:46,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:06:46,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d7c3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46, skipping insertion in model container [2022-11-22 00:06:46,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:06:46,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:06:49,201 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c[376251,376264] [2022-11-22 00:06:49,237 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c[383339,383352] [2022-11-22 00:06:49,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:06:49,581 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:06:50,743 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c[376251,376264] [2022-11-22 00:06:50,755 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c[383339,383352] [2022-11-22 00:06:50,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:06:50,900 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:06:50,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50 WrapperNode [2022-11-22 00:06:50,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:06:50,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:06:50,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:06:50,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:06:50,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:51,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:51,533 INFO L138 Inliner]: procedures = 70, calls = 80, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 13257 [2022-11-22 00:06:51,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:06:51,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:06:51,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:06:51,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:06:51,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:51,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:51,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:51,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:51,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:51,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:51,866 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:51,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:52,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:06:52,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:06:52,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:06:52,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:06:52,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:52,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:06:52,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:06:52,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:06:52,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:06:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:06:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 00:06:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 00:06:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 00:06:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 00:06:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 00:06:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 00:06:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 00:06:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 00:06:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 00:06:52,139 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 00:06:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 00:06:52,139 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 00:06:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:06:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:06:52,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:06:52,280 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:06:52,283 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:07:01,757 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:07:04,357 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:07:04,357 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-22 00:07:04,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:07:04 BoogieIcfgContainer [2022-11-22 00:07:04,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:07:04,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:07:04,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:07:04,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:07:04,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:06:46" (1/3) ... [2022-11-22 00:07:04,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e12d2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:07:04, skipping insertion in model container [2022-11-22 00:07:04,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (2/3) ... [2022-11-22 00:07:04,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e12d2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:07:04, skipping insertion in model container [2022-11-22 00:07:04,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:07:04" (3/3) ... [2022-11-22 00:07:04,374 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.13.cil-2.c [2022-11-22 00:07:04,398 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:07:04,398 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 00:07:04,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:07:04,511 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;@62607e55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:07:04,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 00:07:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 00:07:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 00:07:04,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:04,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:04,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash 413510550, now seen corresponding path program 1 times [2022-11-22 00:07:04,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:04,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124841952] [2022-11-22 00:07:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:04,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:05,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:05,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124841952] [2022-11-22 00:07:05,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124841952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:05,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:05,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:07:05,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675776585] [2022-11-22 00:07:05,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:05,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:07:05,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:07:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:07:05,162 INFO L87 Difference]: Start difference. First operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:07:06,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:06,722 INFO L93 Difference]: Finished difference Result 3866 states and 7483 transitions. [2022-11-22 00:07:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:07:06,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-22 00:07:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:06,753 INFO L225 Difference]: With dead ends: 3866 [2022-11-22 00:07:06,753 INFO L226 Difference]: Without dead ends: 2023 [2022-11-22 00:07:06,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:07:06,770 INFO L413 NwaCegarLoop]: 3541 mSDtfsCounter, 3812 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 6980 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:06,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3812 Valid, 6980 Invalid, 756 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 00:07:06,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-11-22 00:07:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2022. [2022-11-22 00:07:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 1958 states have (on average 1.916241062308478) internal successors, (3752), 1961 states have internal predecessors, (3752), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-22 00:07:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 3852 transitions. [2022-11-22 00:07:06,961 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 3852 transitions. Word has length 70 [2022-11-22 00:07:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:06,962 INFO L495 AbstractCegarLoop]: Abstraction has 2022 states and 3852 transitions. [2022-11-22 00:07:06,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:07:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 3852 transitions. [2022-11-22 00:07:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 00:07:06,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:06,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:06,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:07:06,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1880807943, now seen corresponding path program 1 times [2022-11-22 00:07:06,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:06,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397305753] [2022-11-22 00:07:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:07:07,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397305753] [2022-11-22 00:07:07,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397305753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929469901] [2022-11-22 00:07:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:07,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:07,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:07,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:07,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:07:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:07,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:07:07,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 00:07:07,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:07:07,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929469901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:07,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:07:07,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:07:07,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790413098] [2022-11-22 00:07:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:07,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:07,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:07,994 INFO L87 Difference]: Start difference. First operand 2022 states and 3852 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:08,631 INFO L93 Difference]: Finished difference Result 2767 states and 5025 transitions. [2022-11-22 00:07:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 00:07:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:08,648 INFO L225 Difference]: With dead ends: 2767 [2022-11-22 00:07:08,648 INFO L226 Difference]: Without dead ends: 2391 [2022-11-22 00:07:08,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:08,653 INFO L413 NwaCegarLoop]: 3360 mSDtfsCounter, 3525 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3600 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:08,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 3600 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:07:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-11-22 00:07:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2387. [2022-11-22 00:07:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2267 states have (on average 1.8619320688134098) internal successors, (4221), 2271 states have internal predecessors, (4221), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-22 00:07:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 4409 transitions. [2022-11-22 00:07:08,761 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 4409 transitions. Word has length 143 [2022-11-22 00:07:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:08,764 INFO L495 AbstractCegarLoop]: Abstraction has 2387 states and 4409 transitions. [2022-11-22 00:07:08,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 4409 transitions. [2022-11-22 00:07:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 00:07:08,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:08,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:08,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 00:07:08,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-22 00:07:08,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1294790153, now seen corresponding path program 1 times [2022-11-22 00:07:08,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:08,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503524336] [2022-11-22 00:07:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:08,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:07:09,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503524336] [2022-11-22 00:07:09,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503524336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:09,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772091530] [2022-11-22 00:07:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:09,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:09,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:09,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:09,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:07:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:09,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:07:09,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 00:07:09,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:07:09,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772091530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:09,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:07:09,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:07:09,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685091770] [2022-11-22 00:07:09,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:09,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:09,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:09,676 INFO L87 Difference]: Start difference. First operand 2387 states and 4409 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:10,248 INFO L93 Difference]: Finished difference Result 3856 states and 6716 transitions. [2022-11-22 00:07:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:10,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 00:07:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:10,264 INFO L225 Difference]: With dead ends: 3856 [2022-11-22 00:07:10,265 INFO L226 Difference]: Without dead ends: 3115 [2022-11-22 00:07:10,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:10,274 INFO L413 NwaCegarLoop]: 3348 mSDtfsCounter, 3537 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:10,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:07:10,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-11-22 00:07:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3109. [2022-11-22 00:07:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 2879 states have (on average 1.7877735324765545) internal successors, (5147), 2885 states have internal predecessors, (5147), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-22 00:07:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 5507 transitions. [2022-11-22 00:07:10,411 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 5507 transitions. Word has length 143 [2022-11-22 00:07:10,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:10,412 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 5507 transitions. [2022-11-22 00:07:10,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 5507 transitions. [2022-11-22 00:07:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 00:07:10,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:10,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:10,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:10,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:10,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash 952569611, now seen corresponding path program 1 times [2022-11-22 00:07:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:10,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402039636] [2022-11-22 00:07:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:07:10,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402039636] [2022-11-22 00:07:10,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402039636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122910697] [2022-11-22 00:07:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:10,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:10,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:10,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:10,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:07:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:07:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:07:11,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:07:11,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122910697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:11,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:07:11,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:07:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983947088] [2022-11-22 00:07:11,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:11,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:11,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:11,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:11,300 INFO L87 Difference]: Start difference. First operand 3109 states and 5507 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:11,886 INFO L93 Difference]: Finished difference Result 6010 states and 10048 transitions. [2022-11-22 00:07:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:11,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 00:07:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:11,913 INFO L225 Difference]: With dead ends: 6010 [2022-11-22 00:07:11,914 INFO L226 Difference]: Without dead ends: 4547 [2022-11-22 00:07:11,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:11,922 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3519 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:11,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:07:11,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2022-11-22 00:07:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4537. [2022-11-22 00:07:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4091 states have (on average 1.7049621119530678) internal successors, (6975), 4101 states have internal predecessors, (6975), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-22 00:07:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 7671 transitions. [2022-11-22 00:07:12,139 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 7671 transitions. Word has length 143 [2022-11-22 00:07:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:12,140 INFO L495 AbstractCegarLoop]: Abstraction has 4537 states and 7671 transitions. [2022-11-22 00:07:12,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 7671 transitions. [2022-11-22 00:07:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 00:07:12,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:12,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:12,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:12,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:12,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:12,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2114925427, now seen corresponding path program 1 times [2022-11-22 00:07:12,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:12,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254158031] [2022-11-22 00:07:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:12,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:07:12,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:12,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254158031] [2022-11-22 00:07:12,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254158031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:12,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530855519] [2022-11-22 00:07:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:12,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:12,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:12,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:12,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:07:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:12,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:07:12,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-22 00:07:12,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:07:12,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530855519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:12,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:07:12,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:07:12,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150731579] [2022-11-22 00:07:12,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:12,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:12,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:12,882 INFO L87 Difference]: Start difference. First operand 4537 states and 7671 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:13,596 INFO L93 Difference]: Finished difference Result 10270 states and 16612 transitions. [2022-11-22 00:07:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:13,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 00:07:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:13,635 INFO L225 Difference]: With dead ends: 10270 [2022-11-22 00:07:13,636 INFO L226 Difference]: Without dead ends: 7379 [2022-11-22 00:07:13,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:13,652 INFO L413 NwaCegarLoop]: 3346 mSDtfsCounter, 3543 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3543 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:13,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3543 Valid, 3586 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:07:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2022-11-22 00:07:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 7361. [2022-11-22 00:07:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 6491 states have (on average 1.6304113387767678) internal successors, (10583), 6509 states have internal predecessors, (10583), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-22 00:07:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 11935 transitions. [2022-11-22 00:07:13,990 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 11935 transitions. Word has length 143 [2022-11-22 00:07:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:13,991 INFO L495 AbstractCegarLoop]: Abstraction has 7361 states and 11935 transitions. [2022-11-22 00:07:13,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 11935 transitions. [2022-11-22 00:07:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 00:07:14,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:14,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:14,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:14,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:14,213 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash -377838577, now seen corresponding path program 1 times [2022-11-22 00:07:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:14,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096574611] [2022-11-22 00:07:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:14,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:07:14,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:14,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096574611] [2022-11-22 00:07:14,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096574611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:14,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572452994] [2022-11-22 00:07:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:14,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:14,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:14,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:14,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:07:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:14,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:07:14,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 00:07:14,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:07:14,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572452994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:14,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:07:14,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:07:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17146313] [2022-11-22 00:07:14,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:14,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:14,729 INFO L87 Difference]: Start difference. First operand 7361 states and 11935 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:15,787 INFO L93 Difference]: Finished difference Result 18694 states and 29540 transitions. [2022-11-22 00:07:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 00:07:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:15,873 INFO L225 Difference]: With dead ends: 18694 [2022-11-22 00:07:15,874 INFO L226 Difference]: Without dead ends: 12979 [2022-11-22 00:07:15,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:15,899 INFO L413 NwaCegarLoop]: 3356 mSDtfsCounter, 3546 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:15,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 3596 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:07:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2022-11-22 00:07:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 12945. [2022-11-22 00:07:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 11243 states have (on average 1.574579738503958) internal successors, (17703), 11277 states have internal predecessors, (17703), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-22 00:07:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 20335 transitions. [2022-11-22 00:07:16,503 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 20335 transitions. Word has length 143 [2022-11-22 00:07:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:16,506 INFO L495 AbstractCegarLoop]: Abstraction has 12945 states and 20335 transitions. [2022-11-22 00:07:16,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 20335 transitions. [2022-11-22 00:07:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 00:07:16,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:16,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:16,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:16,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 00:07:16,741 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:16,742 INFO L85 PathProgramCache]: Analyzing trace with hash -884439731, now seen corresponding path program 1 times [2022-11-22 00:07:16,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:16,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032927892] [2022-11-22 00:07:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:07:16,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:16,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032927892] [2022-11-22 00:07:16,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032927892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:16,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036375550] [2022-11-22 00:07:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:16,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:16,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:16,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:16,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:07:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:07:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:07:17,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:07:17,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036375550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:17,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:07:17,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:07:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224425938] [2022-11-22 00:07:17,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:17,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:17,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:17,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:17,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:17,298 INFO L87 Difference]: Start difference. First operand 12945 states and 20335 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:18,694 INFO L93 Difference]: Finished difference Result 35350 states and 54996 transitions. [2022-11-22 00:07:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 00:07:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:18,790 INFO L225 Difference]: With dead ends: 35350 [2022-11-22 00:07:18,790 INFO L226 Difference]: Without dead ends: 24051 [2022-11-22 00:07:18,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:18,829 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3516 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3516 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:18,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3516 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:07:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24051 states. [2022-11-22 00:07:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24051 to 23985. [2022-11-22 00:07:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23985 states, 20651 states have (on average 1.53750423708295) internal successors, (31751), 20717 states have internal predecessors, (31751), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-22 00:07:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23985 states to 23985 states and 36879 transitions. [2022-11-22 00:07:20,300 INFO L78 Accepts]: Start accepts. Automaton has 23985 states and 36879 transitions. Word has length 143 [2022-11-22 00:07:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:20,301 INFO L495 AbstractCegarLoop]: Abstraction has 23985 states and 36879 transitions. [2022-11-22 00:07:20,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:20,301 INFO L276 IsEmpty]: Start isEmpty. Operand 23985 states and 36879 transitions. [2022-11-22 00:07:20,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 00:07:20,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:20,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:20,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:20,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 00:07:20,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2001307403, now seen corresponding path program 1 times [2022-11-22 00:07:20,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:20,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358548149] [2022-11-22 00:07:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:20,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:07:20,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:20,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358548149] [2022-11-22 00:07:20,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358548149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:20,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230804561] [2022-11-22 00:07:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:20,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:20,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:20,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:20,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:07:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:07:21,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 00:07:21,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:07:21,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230804561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:21,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:07:21,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:07:21,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650831951] [2022-11-22 00:07:21,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:21,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:21,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:21,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:21,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:21,183 INFO L87 Difference]: Start difference. First operand 23985 states and 36879 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:23,785 INFO L93 Difference]: Finished difference Result 68278 states and 105108 transitions. [2022-11-22 00:07:23,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:23,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 00:07:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:23,998 INFO L225 Difference]: With dead ends: 68278 [2022-11-22 00:07:23,999 INFO L226 Difference]: Without dead ends: 45939 [2022-11-22 00:07:24,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:24,264 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3531 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3531 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:24,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3531 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:07:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45939 states. [2022-11-22 00:07:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45939 to 45809. [2022-11-22 00:07:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45809 states, 39275 states have (on average 1.514016549968173) internal successors, (59463), 39405 states have internal predecessors, (59463), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-22 00:07:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45809 states to 45809 states and 69455 transitions. [2022-11-22 00:07:26,918 INFO L78 Accepts]: Start accepts. Automaton has 45809 states and 69455 transitions. Word has length 143 [2022-11-22 00:07:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:26,918 INFO L495 AbstractCegarLoop]: Abstraction has 45809 states and 69455 transitions. [2022-11-22 00:07:26,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:07:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 45809 states and 69455 transitions. [2022-11-22 00:07:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 00:07:27,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:27,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:27,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:27,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e312fd-adcb-4d6c-b7c0-b21a98c7bd28/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:27,228 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash 625545613, now seen corresponding path program 1 times [2022-11-22 00:07:27,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:27,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508540949] [2022-11-22 00:07:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:27,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 00:07:28,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:28,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508540949] [2022-11-22 00:07:28,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508540949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:28,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:28,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:07:28,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882944102] [2022-11-22 00:07:28,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:28,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:07:28,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:07:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:28,066 INFO L87 Difference]: Start difference. First operand 45809 states and 69455 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:07:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:34,935 INFO L93 Difference]: Finished difference Result 156917 states and 235730 transitions. [2022-11-22 00:07:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:07:34,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2022-11-22 00:07:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:35,808 INFO L225 Difference]: With dead ends: 156917 [2022-11-22 00:07:35,808 INFO L226 Difference]: Without dead ends: 112755 [2022-11-22 00:07:35,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:07:35,940 INFO L413 NwaCegarLoop]: 3328 mSDtfsCounter, 4487 mSDsluCounter, 6601 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4509 SdHoareTripleChecker+Valid, 9929 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:35,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4509 Valid, 9929 Invalid, 1097 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 00:07:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112755 states. [2022-11-22 00:07:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112755 to 88433. [2022-11-22 00:07:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88433 states, 75627 states have (on average 1.4988165602232006) internal successors, (113351), 75885 states have internal predecessors, (113351), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-22 00:07:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88433 states to 88433 states and 132815 transitions. [2022-11-22 00:07:41,969 INFO L78 Accepts]: Start accepts. Automaton has 88433 states and 132815 transitions. Word has length 143 [2022-11-22 00:07:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:41,971 INFO L495 AbstractCegarLoop]: Abstraction has 88433 states and 132815 transitions. [2022-11-22 00:07:41,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:07:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 88433 states and 132815 transitions. [2022-11-22 00:07:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 00:07:42,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:42,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:07:42,151 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1702202652, now seen corresponding path program 1 times [2022-11-22 00:07:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:42,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892006868] [2022-11-22 00:07:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:42,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 00:07:43,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:43,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892006868] [2022-11-22 00:07:43,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892006868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:43,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:43,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:07:43,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168713940] [2022-11-22 00:07:43,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:43,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:07:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:07:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:43,218 INFO L87 Difference]: Start difference. First operand 88433 states and 132815 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:07:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:53,091 INFO L93 Difference]: Finished difference Result 238325 states and 357457 transitions. [2022-11-22 00:07:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:07:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-11-22 00:07:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:54,085 INFO L225 Difference]: With dead ends: 238325 [2022-11-22 00:07:54,085 INFO L226 Difference]: Without dead ends: 151539