./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9 --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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- 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-6b4ec56 [2022-11-20 20:59:55,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:59:55,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:59:55,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:59:55,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:59:55,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:59:55,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:59:55,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:59:55,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:59:55,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:59:55,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:59:55,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:59:55,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:59:55,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:59:55,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:59:55,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:59:55,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:59:55,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:59:55,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:59:55,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:59:55,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:59:55,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:59:55,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:59:55,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:59:55,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:59:55,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:59:55,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:59:55,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:59:55,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:59:55,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:59:55,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:59:55,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:59:55,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:59:55,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:59:55,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:59:55,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:59:55,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:59:55,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:59:55,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:59:55,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:59:55,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:59:55,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:59:55,276 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:59:55,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:59:55,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:59:55,277 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:59:55,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:59:55,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:59:55,278 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:59:55,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:59:55,279 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:59:55,279 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:59:55,280 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:59:55,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:59:55,280 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:59:55,280 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:59:55,281 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:59:55,281 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:59:55,281 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:59:55,281 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:59:55,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:59:55,283 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:59:55,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:59:55,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:59:55,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:59:55,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:59:55,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:59:55,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:59:55,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:59:55,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:59:55,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:59:55,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:59:55,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:59:55,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:59:55,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:59:55,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:59:55,287 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:59:55,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:59:55,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:59:55,287 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:59:55,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:59:55,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:59:55,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:59:55,288 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_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2022-11-20 20:59:55,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:59:55,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:59:55,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:59:55,635 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:59:55,636 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:59:55,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2022-11-20 20:59:59,271 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:59:59,742 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:59:59,745 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2022-11-20 20:59:59,775 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/data/e9eb715dc/528129bf933a45a8b733bf7d2f78c89f/FLAGfd24a9f6d [2022-11-20 20:59:59,794 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/data/e9eb715dc/528129bf933a45a8b733bf7d2f78c89f [2022-11-20 20:59:59,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:59:59,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:59:59,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:59:59,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:59:59,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:59:59,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:59:59" (1/1) ... [2022-11-20 20:59:59,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d33b0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:59, skipping insertion in model container [2022-11-20 20:59:59,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:59:59" (1/1) ... [2022-11-20 20:59:59,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:59:59,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:00:00,475 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_a92147c2-fe02-4635-926d-c7228c1134c8/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2022-11-20 21:00:00,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:00:00,589 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:00:00,687 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_a92147c2-fe02-4635-926d-c7228c1134c8/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2022-11-20 21:00:00,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:00:00,734 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:00:00,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00 WrapperNode [2022-11-20 21:00:00,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:00:00,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:00:00,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:00:00,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:00:00,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,821 INFO L138 Inliner]: procedures = 90, calls = 338, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 818 [2022-11-20 21:00:00,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:00:00,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:00:00,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:00:00,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:00:00,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,918 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:00:00,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:00:00,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:00:00,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:00:00,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (1/1) ... [2022-11-20 21:00:00,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:00:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:00:01,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:00:01,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:00:01,058 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-20 21:00:01,059 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-20 21:00:01,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:00:01,059 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-20 21:00:01,059 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-20 21:00:01,059 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-20 21:00:01,060 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-20 21:00:01,060 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-11-20 21:00:01,060 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-11-20 21:00:01,060 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-20 21:00:01,060 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-20 21:00:01,060 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-20 21:00:01,061 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-20 21:00:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-20 21:00:01,061 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-20 21:00:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-20 21:00:01,061 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-20 21:00:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 21:00:01,062 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 21:00:01,062 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 21:00:01,062 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 21:00:01,063 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-20 21:00:01,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-20 21:00:01,064 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-20 21:00:01,064 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-20 21:00:01,065 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-20 21:00:01,066 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-20 21:00:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-20 21:00:01,066 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-20 21:00:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-20 21:00:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-20 21:00:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-20 21:00:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-20 21:00:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-20 21:00:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-20 21:00:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-20 21:00:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-20 21:00:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-20 21:00:01,070 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-20 21:00:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:00:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-20 21:00:01,070 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-20 21:00:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-20 21:00:01,071 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-20 21:00:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-20 21:00:01,071 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-20 21:00:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-20 21:00:01,072 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-20 21:00:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-20 21:00:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-20 21:00:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:00:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:00:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-20 21:00:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-20 21:00:01,317 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:00:01,327 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:00:03,229 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:00:04,232 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:00:04,233 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 21:00:04,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:00:04 BoogieIcfgContainer [2022-11-20 21:00:04,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:00:04,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:00:04,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:00:04,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:00:04,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:59:59" (1/3) ... [2022-11-20 21:00:04,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a24bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:00:04, skipping insertion in model container [2022-11-20 21:00:04,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:00" (2/3) ... [2022-11-20 21:00:04,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a24bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:00:04, skipping insertion in model container [2022-11-20 21:00:04,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:00:04" (3/3) ... [2022-11-20 21:00:04,255 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2022-11-20 21:00:04,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:00:04,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:00:04,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:00:04,405 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;@5348579f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:00:04,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:00:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-20 21:00:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 21:00:04,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:04,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:04,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash 5537700, now seen corresponding path program 1 times [2022-11-20 21:00:04,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:04,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481884385] [2022-11-20 21:00:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:04,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:00:05,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481884385] [2022-11-20 21:00:05,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481884385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:05,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:00:05,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 21:00:05,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047454288] [2022-11-20 21:00:05,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:05,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:00:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:00:05,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:00:05,910 INFO L87 Difference]: Start difference. First operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-20 21:00:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:06,938 INFO L93 Difference]: Finished difference Result 1204 states and 1950 transitions. [2022-11-20 21:00:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:00:06,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-11-20 21:00:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:06,960 INFO L225 Difference]: With dead ends: 1204 [2022-11-20 21:00:06,960 INFO L226 Difference]: Without dead ends: 800 [2022-11-20 21:00:06,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:00:06,972 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 1011 mSDsluCounter, 3629 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 4449 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:06,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 4449 Invalid, 452 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 21:00:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-11-20 21:00:07,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 784. [2022-11-20 21:00:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 549 states have (on average 1.5810564663023678) internal successors, (868), 576 states have internal predecessors, (868), 188 states have call successors, (188), 47 states have call predecessors, (188), 46 states have return successors, (193), 185 states have call predecessors, (193), 184 states have call successors, (193) [2022-11-20 21:00:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1249 transitions. [2022-11-20 21:00:07,104 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1249 transitions. Word has length 82 [2022-11-20 21:00:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:07,105 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1249 transitions. [2022-11-20 21:00:07,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-20 21:00:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1249 transitions. [2022-11-20 21:00:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 21:00:07,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:07,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:07,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:00:07,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:07,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:07,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1875561754, now seen corresponding path program 1 times [2022-11-20 21:00:07,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:07,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281470460] [2022-11-20 21:00:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:07,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:00:08,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:08,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281470460] [2022-11-20 21:00:08,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281470460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:08,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:00:08,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:00:08,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974922600] [2022-11-20 21:00:08,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:08,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:00:08,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:00:08,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:00:08,631 INFO L87 Difference]: Start difference. First operand 784 states and 1249 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 21:00:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:10,667 INFO L93 Difference]: Finished difference Result 3051 states and 4958 transitions. [2022-11-20 21:00:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:00:10,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2022-11-20 21:00:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:10,694 INFO L225 Difference]: With dead ends: 3051 [2022-11-20 21:00:10,694 INFO L226 Difference]: Without dead ends: 2282 [2022-11-20 21:00:10,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:00:10,709 INFO L413 NwaCegarLoop]: 1243 mSDtfsCounter, 1186 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:10,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1190 Valid, 3076 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 21:00:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2022-11-20 21:00:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1968. [2022-11-20 21:00:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1429 states have (on average 1.5612316305108467) internal successors, (2231), 1481 states have internal predecessors, (2231), 422 states have call successors, (422), 117 states have call predecessors, (422), 116 states have return successors, (492), 407 states have call predecessors, (492), 414 states have call successors, (492) [2022-11-20 21:00:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 3145 transitions. [2022-11-20 21:00:10,998 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 3145 transitions. Word has length 87 [2022-11-20 21:00:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:10,999 INFO L495 AbstractCegarLoop]: Abstraction has 1968 states and 3145 transitions. [2022-11-20 21:00:10,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 21:00:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 3145 transitions. [2022-11-20 21:00:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 21:00:11,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:11,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:11,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:00:11,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1759243421, now seen corresponding path program 1 times [2022-11-20 21:00:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:11,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445434545] [2022-11-20 21:00:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:00:11,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:11,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445434545] [2022-11-20 21:00:11,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445434545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:11,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:00:11,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 21:00:11,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235073274] [2022-11-20 21:00:11,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:11,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:00:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:11,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:00:11,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:00:11,353 INFO L87 Difference]: Start difference. First operand 1968 states and 3145 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-20 21:00:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:11,824 INFO L93 Difference]: Finished difference Result 3091 states and 4974 transitions. [2022-11-20 21:00:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:00:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2022-11-20 21:00:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:11,849 INFO L225 Difference]: With dead ends: 3091 [2022-11-20 21:00:11,849 INFO L226 Difference]: Without dead ends: 2099 [2022-11-20 21:00:11,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:00:11,870 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 32 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3776 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:11,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3776 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:00:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2022-11-20 21:00:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2063. [2022-11-20 21:00:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 1496 states have (on average 1.5481283422459893) internal successors, (2316), 1549 states have internal predecessors, (2316), 434 states have call successors, (434), 117 states have call predecessors, (434), 132 states have return successors, (559), 434 states have call predecessors, (559), 426 states have call successors, (559) [2022-11-20 21:00:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 3309 transitions. [2022-11-20 21:00:12,091 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 3309 transitions. Word has length 86 [2022-11-20 21:00:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:12,092 INFO L495 AbstractCegarLoop]: Abstraction has 2063 states and 3309 transitions. [2022-11-20 21:00:12,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-20 21:00:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 3309 transitions. [2022-11-20 21:00:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 21:00:12,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:12,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:12,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:00:12,098 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:12,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:12,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1201600250, now seen corresponding path program 1 times [2022-11-20 21:00:12,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:12,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949451948] [2022-11-20 21:00:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:12,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:00:12,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:12,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949451948] [2022-11-20 21:00:12,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949451948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:12,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:00:12,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 21:00:12,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801437179] [2022-11-20 21:00:12,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:12,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:00:12,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:00:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:00:12,543 INFO L87 Difference]: Start difference. First operand 2063 states and 3309 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-20 21:00:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:12,951 INFO L93 Difference]: Finished difference Result 3193 states and 5130 transitions. [2022-11-20 21:00:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:00:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2022-11-20 21:00:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:12,971 INFO L225 Difference]: With dead ends: 3193 [2022-11-20 21:00:12,972 INFO L226 Difference]: Without dead ends: 2132 [2022-11-20 21:00:12,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:00:12,989 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3795 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:12,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3795 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:00:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-11-20 21:00:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2070. [2022-11-20 21:00:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 1503 states have (on average 1.5455755156353959) internal successors, (2323), 1549 states have internal predecessors, (2323), 434 states have call successors, (434), 117 states have call predecessors, (434), 132 states have return successors, (559), 441 states have call predecessors, (559), 426 states have call successors, (559) [2022-11-20 21:00:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3316 transitions. [2022-11-20 21:00:13,213 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3316 transitions. Word has length 87 [2022-11-20 21:00:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:13,215 INFO L495 AbstractCegarLoop]: Abstraction has 2070 states and 3316 transitions. [2022-11-20 21:00:13,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-20 21:00:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3316 transitions. [2022-11-20 21:00:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-20 21:00:13,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:13,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:13,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:00:13,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1617245847, now seen corresponding path program 1 times [2022-11-20 21:00:13,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:13,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848652193] [2022-11-20 21:00:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:13,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:00:13,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:13,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848652193] [2022-11-20 21:00:13,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848652193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:13,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:00:13,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:00:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309246704] [2022-11-20 21:00:13,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:13,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:00:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:00:13,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:00:13,525 INFO L87 Difference]: Start difference. First operand 2070 states and 3316 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 21:00:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:14,927 INFO L93 Difference]: Finished difference Result 4535 states and 7325 transitions. [2022-11-20 21:00:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:00:14,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-11-20 21:00:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:14,951 INFO L225 Difference]: With dead ends: 4535 [2022-11-20 21:00:14,952 INFO L226 Difference]: Without dead ends: 3111 [2022-11-20 21:00:14,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:00:14,973 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 1146 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:14,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 2136 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 21:00:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-20 21:00:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3070. [2022-11-20 21:00:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 2199 states have (on average 1.4943155979990905) internal successors, (3286), 2271 states have internal predecessors, (3286), 651 states have call successors, (651), 194 states have call predecessors, (651), 219 states have return successors, (882), 662 states have call predecessors, (882), 640 states have call successors, (882) [2022-11-20 21:00:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 4819 transitions. [2022-11-20 21:00:15,331 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 4819 transitions. Word has length 93 [2022-11-20 21:00:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:15,332 INFO L495 AbstractCegarLoop]: Abstraction has 3070 states and 4819 transitions. [2022-11-20 21:00:15,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 21:00:15,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 4819 transitions. [2022-11-20 21:00:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-20 21:00:15,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:15,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:15,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:00:15,338 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:15,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1301135404, now seen corresponding path program 1 times [2022-11-20 21:00:15,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:15,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867507179] [2022-11-20 21:00:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:15,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:00:15,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:15,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867507179] [2022-11-20 21:00:15,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867507179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:15,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:00:15,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:00:15,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098497563] [2022-11-20 21:00:15,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:15,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:00:15,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:00:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:00:15,699 INFO L87 Difference]: Start difference. First operand 3070 states and 4819 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 21:00:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:16,632 INFO L93 Difference]: Finished difference Result 5309 states and 8380 transitions. [2022-11-20 21:00:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:00:16,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2022-11-20 21:00:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:16,663 INFO L225 Difference]: With dead ends: 5309 [2022-11-20 21:00:16,664 INFO L226 Difference]: Without dead ends: 3111 [2022-11-20 21:00:16,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:00:16,688 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 519 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:16,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 2839 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:00:16,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-20 21:00:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3086. [2022-11-20 21:00:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2208 states have (on average 1.4923007246376812) internal successors, (3295), 2284 states have internal predecessors, (3295), 655 states have call successors, (655), 197 states have call predecessors, (655), 222 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-20 21:00:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4843 transitions. [2022-11-20 21:00:17,001 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4843 transitions. Word has length 95 [2022-11-20 21:00:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:17,001 INFO L495 AbstractCegarLoop]: Abstraction has 3086 states and 4843 transitions. [2022-11-20 21:00:17,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 21:00:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4843 transitions. [2022-11-20 21:00:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 21:00:17,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:17,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:00:17,005 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2045698277, now seen corresponding path program 1 times [2022-11-20 21:00:17,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:17,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296238794] [2022-11-20 21:00:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:17,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 21:00:17,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:17,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296238794] [2022-11-20 21:00:17,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296238794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:00:17,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921804270] [2022-11-20 21:00:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:17,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:17,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:00:17,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:00:17,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:00:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:17,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:00:17,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:00:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:00:17,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:00:17,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921804270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:17,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:00:17,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-20 21:00:17,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068771732] [2022-11-20 21:00:17,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:17,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:00:17,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:17,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:00:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:00:17,699 INFO L87 Difference]: Start difference. First operand 3086 states and 4843 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:00:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:18,114 INFO L93 Difference]: Finished difference Result 6211 states and 9938 transitions. [2022-11-20 21:00:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:00:18,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2022-11-20 21:00:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:18,135 INFO L225 Difference]: With dead ends: 6211 [2022-11-20 21:00:18,135 INFO L226 Difference]: Without dead ends: 3140 [2022-11-20 21:00:18,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:00:18,163 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 85 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:18,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1689 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:00:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2022-11-20 21:00:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3140. [2022-11-20 21:00:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2253 states have (on average 1.486462494451842) internal successors, (3349), 2329 states have internal predecessors, (3349), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-20 21:00:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4897 transitions. [2022-11-20 21:00:18,473 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4897 transitions. Word has length 99 [2022-11-20 21:00:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:18,474 INFO L495 AbstractCegarLoop]: Abstraction has 3140 states and 4897 transitions. [2022-11-20 21:00:18,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:00:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4897 transitions. [2022-11-20 21:00:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 21:00:18,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:18,478 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:18,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 21:00:18,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 21:00:18,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash 392584210, now seen corresponding path program 1 times [2022-11-20 21:00:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:18,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925483778] [2022-11-20 21:00:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:00:18,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:18,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925483778] [2022-11-20 21:00:18,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925483778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:00:18,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752421991] [2022-11-20 21:00:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:18,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:18,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:00:18,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:00:18,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:00:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:19,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:00:19,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:00:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:00:19,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:00:19,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752421991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:19,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:00:19,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-20 21:00:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599554169] [2022-11-20 21:00:19,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:00:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:00:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:00:19,338 INFO L87 Difference]: Start difference. First operand 3140 states and 4897 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:00:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:19,796 INFO L93 Difference]: Finished difference Result 6292 states and 9956 transitions. [2022-11-20 21:00:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:00:19,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 101 [2022-11-20 21:00:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:19,836 INFO L225 Difference]: With dead ends: 6292 [2022-11-20 21:00:19,836 INFO L226 Difference]: Without dead ends: 3131 [2022-11-20 21:00:19,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:00:19,861 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 91 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:19,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1685 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:00:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-11-20 21:00:20,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2022-11-20 21:00:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2244 states have (on average 1.4763814616755793) internal successors, (3313), 2320 states have internal predecessors, (3313), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-20 21:00:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4861 transitions. [2022-11-20 21:00:20,111 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4861 transitions. Word has length 101 [2022-11-20 21:00:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:20,113 INFO L495 AbstractCegarLoop]: Abstraction has 3131 states and 4861 transitions. [2022-11-20 21:00:20,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:00:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4861 transitions. [2022-11-20 21:00:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 21:00:20,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:20,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:20,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:00:20,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:20,325 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:20,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1194234044, now seen corresponding path program 1 times [2022-11-20 21:00:20,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:20,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123648262] [2022-11-20 21:00:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:20,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:00:20,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:20,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123648262] [2022-11-20 21:00:20,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123648262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:00:20,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849976579] [2022-11-20 21:00:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:20,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:20,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:00:20,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:00:20,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:00:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:00:21,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:00:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:00:21,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:00:21,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849976579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:21,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:00:21,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-20 21:00:21,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766007017] [2022-11-20 21:00:21,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:21,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:00:21,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:21,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:00:21,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:00:21,096 INFO L87 Difference]: Start difference. First operand 3131 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:00:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:22,734 INFO L93 Difference]: Finished difference Result 8109 states and 13165 transitions. [2022-11-20 21:00:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:00:22,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-20 21:00:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:22,772 INFO L225 Difference]: With dead ends: 8109 [2022-11-20 21:00:22,772 INFO L226 Difference]: Without dead ends: 4993 [2022-11-20 21:00:22,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:00:22,799 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 623 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:22,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 2000 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 21:00:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-11-20 21:00:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4931. [2022-11-20 21:00:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3556 states have (on average 1.4569741282339708) internal successors, (5181), 3678 states have internal predecessors, (5181), 1011 states have call successors, (1011), 324 states have call predecessors, (1011), 363 states have return successors, (1624), 1022 states have call predecessors, (1624), 994 states have call successors, (1624) [2022-11-20 21:00:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7816 transitions. [2022-11-20 21:00:23,276 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7816 transitions. Word has length 102 [2022-11-20 21:00:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:23,277 INFO L495 AbstractCegarLoop]: Abstraction has 4931 states and 7816 transitions. [2022-11-20 21:00:23,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:00:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7816 transitions. [2022-11-20 21:00:23,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-20 21:00:23,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:23,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:23,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:00:23,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:23,488 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:23,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1216711657, now seen corresponding path program 1 times [2022-11-20 21:00:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:23,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446363324] [2022-11-20 21:00:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:23,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:00:23,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:23,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446363324] [2022-11-20 21:00:23,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446363324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:00:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611527617] [2022-11-20 21:00:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:23,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:23,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:00:23,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:00:23,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:00:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:24,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:00:24,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:00:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:00:24,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:00:24,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611527617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:24,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:00:24,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-20 21:00:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536854083] [2022-11-20 21:00:24,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:24,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:00:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:00:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:00:24,371 INFO L87 Difference]: Start difference. First operand 4931 states and 7816 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:00:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:25,767 INFO L93 Difference]: Finished difference Result 11020 states and 18004 transitions. [2022-11-20 21:00:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:00:25,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2022-11-20 21:00:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:25,815 INFO L225 Difference]: With dead ends: 11020 [2022-11-20 21:00:25,815 INFO L226 Difference]: Without dead ends: 6104 [2022-11-20 21:00:25,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:00:25,852 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 700 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:25,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 3257 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:00:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2022-11-20 21:00:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 6080. [2022-11-20 21:00:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4412 states have (on average 1.4320036264732547) internal successors, (6318), 4548 states have internal predecessors, (6318), 1174 states have call successors, (1174), 449 states have call predecessors, (1174), 493 states have return successors, (2598), 1175 states have call predecessors, (2598), 1145 states have call successors, (2598) [2022-11-20 21:00:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 10090 transitions. [2022-11-20 21:00:26,454 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 10090 transitions. Word has length 104 [2022-11-20 21:00:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:26,455 INFO L495 AbstractCegarLoop]: Abstraction has 6080 states and 10090 transitions. [2022-11-20 21:00:26,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:00:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 10090 transitions. [2022-11-20 21:00:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 21:00:26,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:26,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:26,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 21:00:26,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:26,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1259941590, now seen corresponding path program 1 times [2022-11-20 21:00:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:26,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219101700] [2022-11-20 21:00:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:00:26,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219101700] [2022-11-20 21:00:26,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219101700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:00:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560093990] [2022-11-20 21:00:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:26,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:00:26,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:00:26,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:00:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:00:27,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:00:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 21:00:27,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:00:27,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560093990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:00:27,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:00:27,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-20 21:00:27,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505130458] [2022-11-20 21:00:27,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:00:27,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:00:27,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:00:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:00:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:00:27,218 INFO L87 Difference]: Start difference. First operand 6080 states and 10090 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:00:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:00:28,062 INFO L93 Difference]: Finished difference Result 11905 states and 20369 transitions. [2022-11-20 21:00:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:00:28,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 108 [2022-11-20 21:00:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:00:28,113 INFO L225 Difference]: With dead ends: 11905 [2022-11-20 21:00:28,113 INFO L226 Difference]: Without dead ends: 5678 [2022-11-20 21:00:28,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:00:28,208 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 5 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:00:28,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1189 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:00:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-11-20 21:00:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5479. [2022-11-20 21:00:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 3922 states have (on average 1.4280979092299848) internal successors, (5601), 4050 states have internal predecessors, (5601), 1109 states have call successors, (1109), 413 states have call predecessors, (1109), 447 states have return successors, (2203), 1108 states have call predecessors, (2203), 1084 states have call successors, (2203) [2022-11-20 21:00:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 8913 transitions. [2022-11-20 21:00:28,835 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 8913 transitions. Word has length 108 [2022-11-20 21:00:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:00:28,836 INFO L495 AbstractCegarLoop]: Abstraction has 5479 states and 8913 transitions. [2022-11-20 21:00:28,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:00:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 8913 transitions. [2022-11-20 21:00:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 21:00:28,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:00:28,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:00:28,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:00:29,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 21:00:29,049 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:00:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:00:29,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1709104290, now seen corresponding path program 1 times [2022-11-20 21:00:29,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:00:29,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131479084] [2022-11-20 21:00:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:29,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:00:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 21:00:29,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:00:29,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131479084] [2022-11-20 21:00:29,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131479084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:00:29,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639622997] [2022-11-20 21:00:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:00:29,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:00:29,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:00:29,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:00:29,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:00:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:00:29,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:00:29,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:00:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:00:29,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:00:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:00:30,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639622997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:00:30,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016417365] [2022-11-20 21:00:30,058 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2022-11-20 21:00:30,058 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:00:30,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:00:30,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:00:30,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:00:37,427 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-20 21:00:39,139 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-20 21:00:39,227 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-11-20 21:00:42,908 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-11-20 21:00:51,523 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-11-20 21:00:52,243 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:01:05,260 WARN L233 SmtUtils]: Spent 7.88s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:01:13,669 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:01:33,868 WARN L233 SmtUtils]: Spent 10.61s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:01:53,077 WARN L233 SmtUtils]: Spent 18.66s on a formula simplification. DAG size of input: 844 DAG size of output: 752 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:02:27,345 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 612 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:02:33,361 WARN L233 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 621 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:02:33,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2016417365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:02:33,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:02:33,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 6, 7] total 32 [2022-11-20 21:02:33,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594136272] [2022-11-20 21:02:33,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:02:33,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:02:33,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:02:33,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:02:33,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-11-20 21:02:33,373 INFO L87 Difference]: Start difference. First operand 5479 states and 8913 transitions. Second operand has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-20 21:02:49,241 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 679 DAG size of output: 547 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:03:00,124 WARN L233 SmtUtils]: Spent 10.55s on a formula simplification. DAG size of input: 752 DAG size of output: 559 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:03:06,098 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:03:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:35,744 INFO L93 Difference]: Finished difference Result 10981 states and 17875 transitions. [2022-11-20 21:03:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 21:03:35,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 110 [2022-11-20 21:03:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:35,779 INFO L225 Difference]: With dead ends: 10981 [2022-11-20 21:03:35,779 INFO L226 Difference]: Without dead ends: 5525 [2022-11-20 21:03:35,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 132.2s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 21:03:35,824 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 40 mSDsluCounter, 3712 mSDsCounter, 0 mSdLazyCounter, 4449 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 4336 SdHoareTripleChecker+Invalid, 4463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:35,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 4336 Invalid, 4463 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 4449 Invalid, 0 Unknown, 0 Unchecked, 30.7s Time] [2022-11-20 21:03:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2022-11-20 21:03:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5499. [2022-11-20 21:03:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3938 states have (on average 1.4268664296597258) internal successors, (5619), 4065 states have internal predecessors, (5619), 1111 states have call successors, (1111), 415 states have call predecessors, (1111), 449 states have return successors, (2205), 1111 states have call predecessors, (2205), 1086 states have call successors, (2205) [2022-11-20 21:03:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 8935 transitions. [2022-11-20 21:03:36,333 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 8935 transitions. Word has length 110 [2022-11-20 21:03:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:36,333 INFO L495 AbstractCegarLoop]: Abstraction has 5499 states and 8935 transitions. [2022-11-20 21:03:36,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-20 21:03:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 8935 transitions. [2022-11-20 21:03:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 21:03:36,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:36,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:36,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:36,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 21:03:36,547 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:03:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1748637696, now seen corresponding path program 1 times [2022-11-20 21:03:36,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:03:36,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137947030] [2022-11-20 21:03:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:03:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:03:36,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:03:36,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137947030] [2022-11-20 21:03:36,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137947030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:03:36,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891550553] [2022-11-20 21:03:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:36,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:36,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:03:36,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:03:36,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:03:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:37,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:03:37,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 21:03:37,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:37,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891550553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:37,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:03:37,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-20 21:03:37,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819932712] [2022-11-20 21:03:37,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:37,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:37,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:03:37,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:37,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:03:37,178 INFO L87 Difference]: Start difference. First operand 5499 states and 8935 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:03:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:38,233 INFO L93 Difference]: Finished difference Result 11386 states and 19601 transitions. [2022-11-20 21:03:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:38,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 113 [2022-11-20 21:03:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:38,287 INFO L225 Difference]: With dead ends: 11386 [2022-11-20 21:03:38,287 INFO L226 Difference]: Without dead ends: 6539 [2022-11-20 21:03:38,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:03:38,335 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 252 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:38,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 2574 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:03:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2022-11-20 21:03:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6323. [2022-11-20 21:03:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 4401 states have (on average 1.4314928425357873) internal successors, (6300), 4639 states have internal predecessors, (6300), 1454 states have call successors, (1454), 415 states have call predecessors, (1454), 467 states have return successors, (2858), 1433 states have call predecessors, (2858), 1429 states have call successors, (2858) [2022-11-20 21:03:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10612 transitions. [2022-11-20 21:03:39,078 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10612 transitions. Word has length 113 [2022-11-20 21:03:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:39,079 INFO L495 AbstractCegarLoop]: Abstraction has 6323 states and 10612 transitions. [2022-11-20 21:03:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:03:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10612 transitions. [2022-11-20 21:03:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 21:03:39,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:39,085 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:39,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:39,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:39,294 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:03:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash -246584639, now seen corresponding path program 1 times [2022-11-20 21:03:39,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:03:39,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926959273] [2022-11-20 21:03:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:03:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:03:39,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:03:39,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926959273] [2022-11-20 21:03:39,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926959273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:03:39,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060790187] [2022-11-20 21:03:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:39,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:39,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:03:39,511 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:03:39,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:03:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:03:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 21:03:40,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:03:40,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060790187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:40,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742508894] [2022-11-20 21:03:40,280 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-11-20 21:03:40,280 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:03:40,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:03:40,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:03:40,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:03:45,294 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-20 21:04:52,754 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 461 for LOIs [2022-11-20 21:04:52,964 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 451 for LOIs [2022-11-20 21:04:53,068 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 457 for LOIs [2022-11-20 21:04:53,188 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 86 for LOIs [2022-11-20 21:04:53,294 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 81 for LOIs [2022-11-20 21:04:53,306 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-20 21:04:53,382 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-11-20 21:04:56,036 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-11-20 21:05:11,144 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-11-20 21:05:11,716 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:05:16,908 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 514 DAG size of output: 509 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:05:25,473 WARN L233 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:05:33,848 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:05:39,346 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 515 DAG size of output: 512 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:05:54,514 WARN L233 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:06:12,391 WARN L233 SmtUtils]: Spent 17.38s on a formula simplification. DAG size of input: 865 DAG size of output: 746 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:06:44,320 WARN L233 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 612 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:06:50,358 WARN L233 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 621 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:07:08,044 WARN L233 SmtUtils]: Spent 9.64s on a formula simplification. DAG size of input: 685 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:07:18,054 WARN L233 SmtUtils]: Spent 9.46s on a formula simplification. DAG size of input: 688 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:07:27,961 WARN L233 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 683 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:07:46,498 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 694 DAG size of output: 608 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:07:58,507 WARN L233 SmtUtils]: Spent 11.19s on a formula simplification. DAG size of input: 703 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:08:10,727 WARN L233 SmtUtils]: Spent 11.37s on a formula simplification. DAG size of input: 712 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:08:23,079 WARN L233 SmtUtils]: Spent 11.47s on a formula simplification. DAG size of input: 717 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:08:35,238 WARN L233 SmtUtils]: Spent 11.36s on a formula simplification. DAG size of input: 716 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:08:57,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1742508894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:08:57,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:08:57,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [5, 6, 7] total 57 [2022-11-20 21:08:57,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903358275] [2022-11-20 21:08:57,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:08:57,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 21:08:57,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:08:57,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 21:08:57,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 21:08:57,691 INFO L87 Difference]: Start difference. First operand 6323 states and 10612 transitions. Second operand has 45 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 21:09:05,064 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 666 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:09:11,289 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 678 DAG size of output: 569 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:09:18,472 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 679 DAG size of output: 547 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:09:32,651 WARN L233 SmtUtils]: Spent 13.59s on a formula simplification. DAG size of input: 746 DAG size of output: 558 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:09:40,071 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:10:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:34,886 INFO L93 Difference]: Finished difference Result 12663 states and 21270 transitions. [2022-11-20 21:10:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 21:10:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) Word has length 117 [2022-11-20 21:10:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:34,929 INFO L225 Difference]: With dead ends: 12663 [2022-11-20 21:10:34,929 INFO L226 Difference]: Without dead ends: 6377 [2022-11-20 21:10:34,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 296 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 265.4s TimeCoverageRelationStatistics Valid=330, Invalid=3452, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 21:10:34,978 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 89 mSDsluCounter, 7686 mSDsCounter, 0 mSdLazyCounter, 9836 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 8318 SdHoareTripleChecker+Invalid, 9854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 9836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:34,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 8318 Invalid, 9854 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [18 Valid, 9836 Invalid, 0 Unknown, 0 Unchecked, 56.8s Time] [2022-11-20 21:10:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6377 states. [2022-11-20 21:10:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6377 to 6337. [2022-11-20 21:10:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6337 states, 4409 states have (on average 1.4304831027443865) internal successors, (6307), 4648 states have internal predecessors, (6307), 1456 states have call successors, (1456), 418 states have call predecessors, (1456), 471 states have return successors, (2862), 1435 states have call predecessors, (2862), 1431 states have call successors, (2862) [2022-11-20 21:10:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 10625 transitions. [2022-11-20 21:10:35,824 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 10625 transitions. Word has length 117 [2022-11-20 21:10:35,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:35,827 INFO L495 AbstractCegarLoop]: Abstraction has 6337 states and 10625 transitions. [2022-11-20 21:10:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 21:10:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 10625 transitions. [2022-11-20 21:10:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 21:10:35,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:35,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:35,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:10:36,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 21:10:36,044 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:10:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1164924802, now seen corresponding path program 1 times [2022-11-20 21:10:36,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:10:36,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987950051] [2022-11-20 21:10:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:10:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:10:36,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:10:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987950051] [2022-11-20 21:10:36,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987950051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:10:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298020805] [2022-11-20 21:10:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:36,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:10:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:10:36,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:10:36,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92147c2-fe02-4635-926d-c7228c1134c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:10:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:36,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:10:36,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 21:10:36,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:10:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:10:37,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298020805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:10:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52767353] [2022-11-20 21:10:37,084 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-11-20 21:10:37,084 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:10:37,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:10:37,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:10:37,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:10:42,216 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-20 21:12:05,810 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 461 for LOIs [2022-11-20 21:12:07,519 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 464 for LOIs [2022-11-20 21:12:10,909 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 526 for LOIs [2022-11-20 21:12:11,424 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 457 for LOIs [2022-11-20 21:12:11,559 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 105 for LOIs [2022-11-20 21:12:12,054 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 97 for LOIs [2022-11-20 21:12:12,071 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-20 21:12:12,166 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-11-20 21:12:15,498 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-11-20 21:13:10,069 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-11-20 21:13:10,734 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:13:16,107 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 514 DAG size of output: 509 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:13:25,153 WARN L233 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:13:34,399 WARN L233 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:13:39,932 WARN L233 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 515 DAG size of output: 512 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)