./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.06.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.06.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:38:23,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:38:23,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:38:23,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:38:23,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:38:23,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:38:23,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:38:23,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:38:23,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:38:23,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:38:23,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:38:23,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:38:23,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:38:23,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:38:23,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:38:23,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:38:23,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:38:23,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:38:23,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:38:23,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:38:23,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:38:23,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:38:23,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:38:23,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:38:23,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:38:23,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:38:23,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:38:23,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:38:23,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:38:23,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:38:23,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:38:23,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:38:23,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:38:23,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:38:23,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:38:23,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:38:23,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:38:23,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:38:23,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:38:23,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:38:23,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:38:23,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:38:23,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:38:23,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:38:23,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:38:23,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:38:23,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:38:23,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:38:23,401 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:38:23,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:38:23,401 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:38:23,401 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:38:23,402 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:38:23,402 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:38:23,402 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:38:23,402 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:38:23,402 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:38:23,403 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:38:23,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:38:23,403 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:38:23,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:38:23,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:38:23,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:38:23,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:38:23,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:38:23,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:38:23,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:38:23,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:38:23,405 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:38:23,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:38:23,405 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:38:23,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:38:23,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:38:23,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:38:23,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:38:23,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:38:23,406 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:38:23,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:38:23,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:38:23,407 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:38:23,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:38:23,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:38:23,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:38:23,407 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_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df [2022-12-14 13:38:23,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:38:23,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:38:23,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:38:23,633 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:38:23,633 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:38:23,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/transmitter.06.cil.c [2022-12-14 13:38:26,323 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:38:26,504 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:38:26,505 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/sv-benchmarks/c/systemc/transmitter.06.cil.c [2022-12-14 13:38:26,514 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/data/aa1fecef0/0ad5b5a1e258432d96a8f0573986c53c/FLAG63b5b627c [2022-12-14 13:38:26,524 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/data/aa1fecef0/0ad5b5a1e258432d96a8f0573986c53c [2022-12-14 13:38:26,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:38:26,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:38:26,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:38:26,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:38:26,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:38:26,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24bc9e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26, skipping insertion in model container [2022-12-14 13:38:26,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:38:26,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:38:26,664 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_02a118e1-705c-4527-8fba-7095baefaf78/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2022-12-14 13:38:26,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:38:26,726 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:38:26,734 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_02a118e1-705c-4527-8fba-7095baefaf78/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2022-12-14 13:38:26,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:38:26,775 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:38:26,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26 WrapperNode [2022-12-14 13:38:26,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:38:26,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:38:26,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:38:26,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:38:26,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,811 INFO L138 Inliner]: procedures = 40, calls = 48, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 492 [2022-12-14 13:38:26,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:38:26,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:38:26,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:38:26,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:38:26,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:38:26,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:38:26,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:38:26,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:38:26,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (1/1) ... [2022-12-14 13:38:26,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:38:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:38:26,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:38:26,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:38:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:38:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 13:38:26,897 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 13:38:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 13:38:26,897 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 13:38:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:38:26,898 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:38:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 13:38:26,898 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 13:38:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 13:38:26,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 13:38:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:38:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 13:38:26,899 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 13:38:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:38:26,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:38:26,974 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:38:26,976 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:38:27,387 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:38:27,572 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:38:27,572 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-14 13:38:27,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:38:27 BoogieIcfgContainer [2022-12-14 13:38:27,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:38:27,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:38:27,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:38:27,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:38:27,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:38:26" (1/3) ... [2022-12-14 13:38:27,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f4c571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:38:27, skipping insertion in model container [2022-12-14 13:38:27,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:38:26" (2/3) ... [2022-12-14 13:38:27,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f4c571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:38:27, skipping insertion in model container [2022-12-14 13:38:27,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:38:27" (3/3) ... [2022-12-14 13:38:27,580 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.06.cil.c [2022-12-14 13:38:27,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:38:27,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:38:27,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:38:27,634 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;@7a8bec22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:38:27,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:38:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 120 states, 93 states have (on average 1.5376344086021505) internal successors, (143), 95 states have internal predecessors, (143), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 13:38:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 13:38:27,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:27,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:27,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2063436427, now seen corresponding path program 1 times [2022-12-14 13:38:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:27,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132571331] [2022-12-14 13:38:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:27,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:27,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:27,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132571331] [2022-12-14 13:38:27,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132571331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:27,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:27,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:38:27,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393139477] [2022-12-14 13:38:27,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:27,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:38:27,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:38:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:38:27,981 INFO L87 Difference]: Start difference. First operand has 120 states, 93 states have (on average 1.5376344086021505) internal successors, (143), 95 states have internal predecessors, (143), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:28,259 INFO L93 Difference]: Finished difference Result 343 states and 533 transitions. [2022-12-14 13:38:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:38:28,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-12-14 13:38:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:28,268 INFO L225 Difference]: With dead ends: 343 [2022-12-14 13:38:28,269 INFO L226 Difference]: Without dead ends: 224 [2022-12-14 13:38:28,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:38:28,274 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 301 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:28,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 462 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:38:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-14 13:38:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2022-12-14 13:38:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 175 states have (on average 1.4628571428571429) internal successors, (256), 176 states have internal predecessors, (256), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-12-14 13:38:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 322 transitions. [2022-12-14 13:38:28,334 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 322 transitions. Word has length 53 [2022-12-14 13:38:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:28,334 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 322 transitions. [2022-12-14 13:38:28,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 322 transitions. [2022-12-14 13:38:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 13:38:28,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:28,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:28,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:38:28,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash -333000564, now seen corresponding path program 1 times [2022-12-14 13:38:28,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629941427] [2022-12-14 13:38:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:28,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:28,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629941427] [2022-12-14 13:38:28,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629941427] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:28,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:28,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:38:28,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907480994] [2022-12-14 13:38:28,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:28,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:38:28,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:38:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:38:28,442 INFO L87 Difference]: Start difference. First operand 221 states and 322 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:28,837 INFO L93 Difference]: Finished difference Result 748 states and 1099 transitions. [2022-12-14 13:38:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:38:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-12-14 13:38:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:28,842 INFO L225 Difference]: With dead ends: 748 [2022-12-14 13:38:28,842 INFO L226 Difference]: Without dead ends: 512 [2022-12-14 13:38:28,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:38:28,845 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 604 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:28,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 739 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:38:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-12-14 13:38:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 500. [2022-12-14 13:38:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 407 states have (on average 1.457002457002457) internal successors, (593), 403 states have internal predecessors, (593), 64 states have call successors, (64), 26 states have call predecessors, (64), 28 states have return successors, (71), 71 states have call predecessors, (71), 64 states have call successors, (71) [2022-12-14 13:38:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 728 transitions. [2022-12-14 13:38:28,882 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 728 transitions. Word has length 53 [2022-12-14 13:38:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:28,883 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 728 transitions. [2022-12-14 13:38:28,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 728 transitions. [2022-12-14 13:38:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 13:38:28,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:28,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:28,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:38:28,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:28,885 INFO L85 PathProgramCache]: Analyzing trace with hash 792259405, now seen corresponding path program 1 times [2022-12-14 13:38:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:28,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982779469] [2022-12-14 13:38:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:28,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:28,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982779469] [2022-12-14 13:38:28,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982779469] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:28,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:28,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:38:28,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102715967] [2022-12-14 13:38:28,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:28,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:38:28,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:38:28,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:38:28,952 INFO L87 Difference]: Start difference. First operand 500 states and 728 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:29,324 INFO L93 Difference]: Finished difference Result 1731 states and 2549 transitions. [2022-12-14 13:38:29,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:38:29,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-12-14 13:38:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:29,329 INFO L225 Difference]: With dead ends: 1731 [2022-12-14 13:38:29,330 INFO L226 Difference]: Without dead ends: 1199 [2022-12-14 13:38:29,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:38:29,332 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 604 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:29,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 606 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:38:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-12-14 13:38:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 939. [2022-12-14 13:38:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 766 states have (on average 1.4556135770234986) internal successors, (1115), 763 states have internal predecessors, (1115), 116 states have call successors, (116), 50 states have call predecessors, (116), 56 states have return successors, (136), 126 states have call predecessors, (136), 116 states have call successors, (136) [2022-12-14 13:38:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1367 transitions. [2022-12-14 13:38:29,388 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1367 transitions. Word has length 53 [2022-12-14 13:38:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:29,389 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 1367 transitions. [2022-12-14 13:38:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1367 transitions. [2022-12-14 13:38:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 13:38:29,390 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:29,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:29,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:38:29,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:29,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:29,392 INFO L85 PathProgramCache]: Analyzing trace with hash -836390868, now seen corresponding path program 1 times [2022-12-14 13:38:29,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:29,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672095670] [2022-12-14 13:38:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:29,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:29,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:29,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672095670] [2022-12-14 13:38:29,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672095670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:29,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:29,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:38:29,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901503266] [2022-12-14 13:38:29,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:29,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:38:29,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:38:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:38:29,493 INFO L87 Difference]: Start difference. First operand 939 states and 1367 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:29,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:29,829 INFO L93 Difference]: Finished difference Result 3186 states and 4702 transitions. [2022-12-14 13:38:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:38:29,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-12-14 13:38:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:29,837 INFO L225 Difference]: With dead ends: 3186 [2022-12-14 13:38:29,837 INFO L226 Difference]: Without dead ends: 2182 [2022-12-14 13:38:29,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:38:29,841 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 604 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:29,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 606 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:38:29,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2022-12-14 13:38:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1791. [2022-12-14 13:38:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1462 states have (on average 1.4521203830369358) internal successors, (2123), 1463 states have internal predecessors, (2123), 216 states have call successors, (216), 98 states have call predecessors, (216), 112 states have return successors, (260), 230 states have call predecessors, (260), 216 states have call successors, (260) [2022-12-14 13:38:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2599 transitions. [2022-12-14 13:38:29,911 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2599 transitions. Word has length 53 [2022-12-14 13:38:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:29,911 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2599 transitions. [2022-12-14 13:38:29,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2599 transitions. [2022-12-14 13:38:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 13:38:29,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:29,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:29,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:38:29,913 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1144829877, now seen corresponding path program 1 times [2022-12-14 13:38:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:29,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818006869] [2022-12-14 13:38:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:29,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:30,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:30,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818006869] [2022-12-14 13:38:30,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818006869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:30,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:30,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:38:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901237724] [2022-12-14 13:38:30,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:30,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:38:30,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:38:30,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:38:30,064 INFO L87 Difference]: Start difference. First operand 1791 states and 2599 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:30,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:30,469 INFO L93 Difference]: Finished difference Result 5440 states and 7938 transitions. [2022-12-14 13:38:30,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:38:30,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-12-14 13:38:30,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:30,488 INFO L225 Difference]: With dead ends: 5440 [2022-12-14 13:38:30,489 INFO L226 Difference]: Without dead ends: 3655 [2022-12-14 13:38:30,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:38:30,495 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 564 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:30,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 512 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:38:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2022-12-14 13:38:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2991. [2022-12-14 13:38:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2470 states have (on average 1.4392712550607287) internal successors, (3555), 2471 states have internal predecessors, (3555), 328 states have call successors, (328), 164 states have call predecessors, (328), 192 states have return successors, (416), 356 states have call predecessors, (416), 328 states have call successors, (416) [2022-12-14 13:38:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 4299 transitions. [2022-12-14 13:38:30,652 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 4299 transitions. Word has length 53 [2022-12-14 13:38:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:30,653 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 4299 transitions. [2022-12-14 13:38:30,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 4299 transitions. [2022-12-14 13:38:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 13:38:30,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:30,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:30,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:38:30,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:30,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:30,654 INFO L85 PathProgramCache]: Analyzing trace with hash -519201837, now seen corresponding path program 1 times [2022-12-14 13:38:30,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:30,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095075528] [2022-12-14 13:38:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:30,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:30,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:30,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095075528] [2022-12-14 13:38:30,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095075528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:30,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:30,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:38:30,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280163652] [2022-12-14 13:38:30,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:30,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:38:30,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:30,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:38:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:38:30,778 INFO L87 Difference]: Start difference. First operand 2991 states and 4299 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:31,336 INFO L93 Difference]: Finished difference Result 10691 states and 15446 transitions. [2022-12-14 13:38:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:38:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-12-14 13:38:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:31,369 INFO L225 Difference]: With dead ends: 10691 [2022-12-14 13:38:31,369 INFO L226 Difference]: Without dead ends: 7706 [2022-12-14 13:38:31,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:38:31,378 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 610 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:31,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 389 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:38:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2022-12-14 13:38:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 5820. [2022-12-14 13:38:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5820 states, 4807 states have (on average 1.4302059496567505) internal successors, (6875), 4810 states have internal predecessors, (6875), 628 states have call successors, (628), 328 states have call predecessors, (628), 384 states have return successors, (790), 682 states have call predecessors, (790), 628 states have call successors, (790) [2022-12-14 13:38:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5820 states to 5820 states and 8293 transitions. [2022-12-14 13:38:31,679 INFO L78 Accepts]: Start accepts. Automaton has 5820 states and 8293 transitions. Word has length 54 [2022-12-14 13:38:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:31,680 INFO L495 AbstractCegarLoop]: Abstraction has 5820 states and 8293 transitions. [2022-12-14 13:38:31,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5820 states and 8293 transitions. [2022-12-14 13:38:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 13:38:31,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:31,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:31,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:38:31,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:31,682 INFO L85 PathProgramCache]: Analyzing trace with hash 584465186, now seen corresponding path program 1 times [2022-12-14 13:38:31,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:31,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009532713] [2022-12-14 13:38:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:31,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:31,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009532713] [2022-12-14 13:38:31,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009532713] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:31,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:31,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:38:31,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007654848] [2022-12-14 13:38:31,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:31,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:38:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:31,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:38:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:38:31,808 INFO L87 Difference]: Start difference. First operand 5820 states and 8293 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:32,569 INFO L93 Difference]: Finished difference Result 16236 states and 23285 transitions. [2022-12-14 13:38:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:38:32,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-12-14 13:38:32,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:32,604 INFO L225 Difference]: With dead ends: 16236 [2022-12-14 13:38:32,604 INFO L226 Difference]: Without dead ends: 10422 [2022-12-14 13:38:32,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:38:32,616 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 527 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:32,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 420 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:38:32,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10422 states. [2022-12-14 13:38:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10422 to 8636. [2022-12-14 13:38:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8636 states, 7123 states have (on average 1.4217324161168048) internal successors, (10127), 7116 states have internal predecessors, (10127), 936 states have call successors, (936), 496 states have call predecessors, (936), 576 states have return successors, (1160), 1024 states have call predecessors, (1160), 936 states have call successors, (1160) [2022-12-14 13:38:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 12223 transitions. [2022-12-14 13:38:33,148 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 12223 transitions. Word has length 55 [2022-12-14 13:38:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:33,148 INFO L495 AbstractCegarLoop]: Abstraction has 8636 states and 12223 transitions. [2022-12-14 13:38:33,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 12223 transitions. [2022-12-14 13:38:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 13:38:33,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:33,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:33,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:38:33,150 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 625531183, now seen corresponding path program 1 times [2022-12-14 13:38:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:33,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161111500] [2022-12-14 13:38:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:33,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:33,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161111500] [2022-12-14 13:38:33,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161111500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:33,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:33,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:38:33,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559398239] [2022-12-14 13:38:33,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:33,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:38:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:38:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:38:33,267 INFO L87 Difference]: Start difference. First operand 8636 states and 12223 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:34,309 INFO L93 Difference]: Finished difference Result 23610 states and 33653 transitions. [2022-12-14 13:38:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:38:34,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-12-14 13:38:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:34,375 INFO L225 Difference]: With dead ends: 23610 [2022-12-14 13:38:34,375 INFO L226 Difference]: Without dead ends: 14980 [2022-12-14 13:38:34,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:38:34,396 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 486 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:34,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 497 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:38:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14980 states. [2022-12-14 13:38:35,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14980 to 12866. [2022-12-14 13:38:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12866 states, 10601 states have (on average 1.4129799075558909) internal successors, (14979), 10574 states have internal predecessors, (14979), 1400 states have call successors, (1400), 752 states have call predecessors, (1400), 864 states have return successors, (1704), 1540 states have call predecessors, (1704), 1400 states have call successors, (1704) [2022-12-14 13:38:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12866 states to 12866 states and 18083 transitions. [2022-12-14 13:38:35,157 INFO L78 Accepts]: Start accepts. Automaton has 12866 states and 18083 transitions. Word has length 56 [2022-12-14 13:38:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:35,157 INFO L495 AbstractCegarLoop]: Abstraction has 12866 states and 18083 transitions. [2022-12-14 13:38:35,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 12866 states and 18083 transitions. [2022-12-14 13:38:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 13:38:35,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:35,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:35,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:38:35,158 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1974711866, now seen corresponding path program 1 times [2022-12-14 13:38:35,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:35,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766800548] [2022-12-14 13:38:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:35,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:35,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:35,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766800548] [2022-12-14 13:38:35,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766800548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:35,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:35,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:38:35,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82900919] [2022-12-14 13:38:35,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:35,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:38:35,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:38:35,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:38:35,277 INFO L87 Difference]: Start difference. First operand 12866 states and 18083 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:37,357 INFO L93 Difference]: Finished difference Result 41998 states and 59370 transitions. [2022-12-14 13:38:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:38:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-12-14 13:38:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:37,431 INFO L225 Difference]: With dead ends: 41998 [2022-12-14 13:38:37,431 INFO L226 Difference]: Without dead ends: 29138 [2022-12-14 13:38:37,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:38:37,457 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 500 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:37,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 376 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:38:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29138 states. [2022-12-14 13:38:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29138 to 24944. [2022-12-14 13:38:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24944 states, 20559 states have (on average 1.402548762099324) internal successors, (28835), 20520 states have internal predecessors, (28835), 2676 states have call successors, (2676), 1492 states have call predecessors, (2676), 1708 states have return successors, (3220), 2932 states have call predecessors, (3220), 2676 states have call successors, (3220) [2022-12-14 13:38:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24944 states to 24944 states and 34731 transitions. [2022-12-14 13:38:39,051 INFO L78 Accepts]: Start accepts. Automaton has 24944 states and 34731 transitions. Word has length 57 [2022-12-14 13:38:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:39,051 INFO L495 AbstractCegarLoop]: Abstraction has 24944 states and 34731 transitions. [2022-12-14 13:38:39,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 24944 states and 34731 transitions. [2022-12-14 13:38:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 13:38:39,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:39,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:39,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:38:39,053 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:39,054 INFO L85 PathProgramCache]: Analyzing trace with hash 5566091, now seen corresponding path program 1 times [2022-12-14 13:38:39,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:39,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351038851] [2022-12-14 13:38:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:39,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:39,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351038851] [2022-12-14 13:38:39,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351038851] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:39,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:39,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:38:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456297089] [2022-12-14 13:38:39,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:39,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:38:39,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:38:39,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:38:39,193 INFO L87 Difference]: Start difference. First operand 24944 states and 34731 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:42,039 INFO L93 Difference]: Finished difference Result 65216 states and 91339 transitions. [2022-12-14 13:38:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:38:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2022-12-14 13:38:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:42,140 INFO L225 Difference]: With dead ends: 65216 [2022-12-14 13:38:42,140 INFO L226 Difference]: Without dead ends: 40278 [2022-12-14 13:38:42,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:38:42,187 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 458 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:42,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 390 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:38:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40278 states. [2022-12-14 13:38:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40278 to 37268. [2022-12-14 13:38:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37268 states, 30729 states have (on average 1.3940251879332226) internal successors, (42837), 30642 states have internal predecessors, (42837), 3992 states have call successors, (3992), 2256 states have call predecessors, (3992), 2546 states have return successors, (4706), 4370 states have call predecessors, (4706), 3992 states have call successors, (4706) [2022-12-14 13:38:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37268 states to 37268 states and 51535 transitions. [2022-12-14 13:38:45,108 INFO L78 Accepts]: Start accepts. Automaton has 37268 states and 51535 transitions. Word has length 58 [2022-12-14 13:38:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:45,108 INFO L495 AbstractCegarLoop]: Abstraction has 37268 states and 51535 transitions. [2022-12-14 13:38:45,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:38:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 37268 states and 51535 transitions. [2022-12-14 13:38:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 13:38:45,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:45,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:45,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:38:45,110 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:45,110 INFO L85 PathProgramCache]: Analyzing trace with hash 603627626, now seen corresponding path program 1 times [2022-12-14 13:38:45,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:45,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135109792] [2022-12-14 13:38:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:45,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:45,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:45,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135109792] [2022-12-14 13:38:45,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135109792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:45,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:45,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:38:45,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770880792] [2022-12-14 13:38:45,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:45,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:38:45,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:45,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:38:45,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:38:45,144 INFO L87 Difference]: Start difference. First operand 37268 states and 51535 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 13:38:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:49,378 INFO L93 Difference]: Finished difference Result 110819 states and 155169 transitions. [2022-12-14 13:38:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:38:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2022-12-14 13:38:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:49,614 INFO L225 Difference]: With dead ends: 110819 [2022-12-14 13:38:49,614 INFO L226 Difference]: Without dead ends: 73556 [2022-12-14 13:38:49,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:38:49,685 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:49,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 286 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:38:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73556 states. [2022-12-14 13:38:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73556 to 73168. [2022-12-14 13:38:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73168 states, 60095 states have (on average 1.370613195773359) internal successors, (82367), 59920 states have internal predecessors, (82367), 7980 states have call successors, (7980), 4512 states have call predecessors, (7980), 5092 states have return successors, (9408), 8736 states have call predecessors, (9408), 7980 states have call successors, (9408) [2022-12-14 13:38:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73168 states to 73168 states and 99755 transitions. [2022-12-14 13:38:54,695 INFO L78 Accepts]: Start accepts. Automaton has 73168 states and 99755 transitions. Word has length 59 [2022-12-14 13:38:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:54,695 INFO L495 AbstractCegarLoop]: Abstraction has 73168 states and 99755 transitions. [2022-12-14 13:38:54,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 13:38:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 73168 states and 99755 transitions. [2022-12-14 13:38:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 13:38:54,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:54,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:54,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:38:54,707 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:38:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:54,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1287349434, now seen corresponding path program 1 times [2022-12-14 13:38:54,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:54,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929639737] [2022-12-14 13:38:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:54,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:38:54,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:54,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929639737] [2022-12-14 13:38:54,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929639737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:54,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:54,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:38:54,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660937011] [2022-12-14 13:38:54,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:54,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:38:54,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:38:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:38:54,752 INFO L87 Difference]: Start difference. First operand 73168 states and 99755 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 13:39:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:39:00,867 INFO L93 Difference]: Finished difference Result 138542 states and 192062 transitions. [2022-12-14 13:39:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:39:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2022-12-14 13:39:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:39:01,094 INFO L225 Difference]: With dead ends: 138542 [2022-12-14 13:39:01,094 INFO L226 Difference]: Without dead ends: 94692 [2022-12-14 13:39:01,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:39:01,156 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 105 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:39:01,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 396 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:39:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94692 states. [2022-12-14 13:39:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94692 to 76078. [2022-12-14 13:39:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76078 states, 62999 states have (on average 1.3873077350434133) internal successors, (87399), 62912 states have internal predecessors, (87399), 8072 states have call successors, (8072), 4716 states have call predecessors, (8072), 5006 states have return successors, (8786), 8450 states have call predecessors, (8786), 8072 states have call successors, (8786) [2022-12-14 13:39:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76078 states to 76078 states and 104257 transitions. [2022-12-14 13:39:06,522 INFO L78 Accepts]: Start accepts. Automaton has 76078 states and 104257 transitions. Word has length 81 [2022-12-14 13:39:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:39:06,522 INFO L495 AbstractCegarLoop]: Abstraction has 76078 states and 104257 transitions. [2022-12-14 13:39:06,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 13:39:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 76078 states and 104257 transitions. [2022-12-14 13:39:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 13:39:06,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:39:06,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:39:06,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:39:06,565 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:39:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:39:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash 157644039, now seen corresponding path program 1 times [2022-12-14 13:39:06,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:39:06,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912551010] [2022-12-14 13:39:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:39:06,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:39:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:39:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:39:06,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:39:06,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912551010] [2022-12-14 13:39:06,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912551010] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:39:06,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67198811] [2022-12-14 13:39:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:39:06,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:39:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:39:06,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:39:06,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:39:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:39:06,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:39:06,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:39:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:39:06,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:39:06,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67198811] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:39:06,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:39:06,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:39:06,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788050535] [2022-12-14 13:39:06,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:39:06,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:39:06,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:39:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:39:06,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:39:06,802 INFO L87 Difference]: Start difference. First operand 76078 states and 104257 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:39:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:39:12,553 INFO L93 Difference]: Finished difference Result 146470 states and 202453 transitions. [2022-12-14 13:39:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:39:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 115 [2022-12-14 13:39:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:39:12,791 INFO L225 Difference]: With dead ends: 146470 [2022-12-14 13:39:12,791 INFO L226 Difference]: Without dead ends: 95062 [2022-12-14 13:39:12,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:39:12,882 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 96 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:39:12,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 388 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:39:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95062 states. [2022-12-14 13:39:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95062 to 84874. [2022-12-14 13:39:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 71083 states have (on average 1.4017838301703642) internal successors, (99643), 70996 states have internal predecessors, (99643), 8428 states have call successors, (8428), 5072 states have call predecessors, (8428), 5362 states have return successors, (9142), 8806 states have call predecessors, (9142), 8428 states have call successors, (9142) [2022-12-14 13:39:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 117213 transitions. [2022-12-14 13:39:18,437 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 117213 transitions. Word has length 115 [2022-12-14 13:39:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:39:18,438 INFO L495 AbstractCegarLoop]: Abstraction has 84874 states and 117213 transitions. [2022-12-14 13:39:18,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:39:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 117213 transitions. [2022-12-14 13:39:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 13:39:18,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:39:18,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:39:18,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:39:18,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:39:18,675 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:39:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:39:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1073065393, now seen corresponding path program 1 times [2022-12-14 13:39:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:39:18,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885822399] [2022-12-14 13:39:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:39:18,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:39:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:39:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 13:39:18,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:39:18,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885822399] [2022-12-14 13:39:18,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885822399] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:39:18,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:39:18,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:39:18,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695860813] [2022-12-14 13:39:18,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:39:18,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:39:18,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:39:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:39:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:39:18,740 INFO L87 Difference]: Start difference. First operand 84874 states and 117213 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 13:39:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:39:26,490 INFO L93 Difference]: Finished difference Result 211959 states and 294072 transitions. [2022-12-14 13:39:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:39:26,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 113 [2022-12-14 13:39:26,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:39:26,812 INFO L225 Difference]: With dead ends: 211959 [2022-12-14 13:39:26,812 INFO L226 Difference]: Without dead ends: 127090 [2022-12-14 13:39:26,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:39:26,949 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 131 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:39:26,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 289 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:39:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127090 states. [2022-12-14 13:39:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127090 to 126390. [2022-12-14 13:39:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126390 states, 105923 states have (on average 1.3888107398770806) internal successors, (147107), 105806 states have internal predecessors, (147107), 12454 states have call successors, (12454), 7584 states have call predecessors, (12454), 8012 states have return successors, (13480), 13000 states have call predecessors, (13480), 12454 states have call successors, (13480) [2022-12-14 13:39:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126390 states to 126390 states and 173041 transitions. [2022-12-14 13:39:35,226 INFO L78 Accepts]: Start accepts. Automaton has 126390 states and 173041 transitions. Word has length 113 [2022-12-14 13:39:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:39:35,226 INFO L495 AbstractCegarLoop]: Abstraction has 126390 states and 173041 transitions. [2022-12-14 13:39:35,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 13:39:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 126390 states and 173041 transitions. [2022-12-14 13:39:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 13:39:35,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:39:35,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:39:35,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 13:39:35,267 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:39:35,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:39:35,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1545103150, now seen corresponding path program 1 times [2022-12-14 13:39:35,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:39:35,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595427055] [2022-12-14 13:39:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:39:35,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:39:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:39:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 13:39:35,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:39:35,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595427055] [2022-12-14 13:39:35,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595427055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:39:35,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709572742] [2022-12-14 13:39:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:39:35,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:39:35,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:39:35,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:39:35,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:39:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:39:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:39:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:39:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:39:35,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:39:35,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709572742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:39:35,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:39:35,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:39:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052457771] [2022-12-14 13:39:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:39:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:39:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:39:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:39:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:39:35,462 INFO L87 Difference]: Start difference. First operand 126390 states and 173041 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:39:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:39:44,947 INFO L93 Difference]: Finished difference Result 241446 states and 333921 transitions. [2022-12-14 13:39:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:39:44,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 115 [2022-12-14 13:39:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:39:45,338 INFO L225 Difference]: With dead ends: 241446 [2022-12-14 13:39:45,338 INFO L226 Difference]: Without dead ends: 156578 [2022-12-14 13:39:45,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:39:45,461 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 90 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:39:45,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 383 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:39:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156578 states. [2022-12-14 13:39:54,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156578 to 143332. [2022-12-14 13:39:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143332 states, 121473 states have (on average 1.4035464671161493) internal successors, (170493), 121356 states have internal predecessors, (170493), 13150 states have call successors, (13150), 8280 states have call predecessors, (13150), 8708 states have return successors, (14176), 13696 states have call predecessors, (14176), 13150 states have call successors, (14176) [2022-12-14 13:39:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143332 states to 143332 states and 197819 transitions. [2022-12-14 13:39:54,779 INFO L78 Accepts]: Start accepts. Automaton has 143332 states and 197819 transitions. Word has length 115 [2022-12-14 13:39:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:39:54,779 INFO L495 AbstractCegarLoop]: Abstraction has 143332 states and 197819 transitions. [2022-12-14 13:39:54,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:39:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 143332 states and 197819 transitions. [2022-12-14 13:39:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 13:39:54,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:39:54,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:39:54,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 13:39:55,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:39:55,032 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:39:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:39:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1020799747, now seen corresponding path program 1 times [2022-12-14 13:39:55,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:39:55,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926073531] [2022-12-14 13:39:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:39:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:39:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:39:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:39:55,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:39:55,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926073531] [2022-12-14 13:39:55,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926073531] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:39:55,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965957734] [2022-12-14 13:39:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:39:55,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:39:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:39:55,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:39:55,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:39:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:39:55,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:39:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:39:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:39:55,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:39:55,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965957734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:39:55,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:39:55,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:39:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685330076] [2022-12-14 13:39:55,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:39:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:39:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:39:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:39:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:39:55,285 INFO L87 Difference]: Start difference. First operand 143332 states and 197819 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:40:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:06,202 INFO L93 Difference]: Finished difference Result 274278 states and 381095 transitions. [2022-12-14 13:40:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:40:06,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 115 [2022-12-14 13:40:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:06,629 INFO L225 Difference]: With dead ends: 274278 [2022-12-14 13:40:06,629 INFO L226 Difference]: Without dead ends: 177394 [2022-12-14 13:40:06,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:40:06,761 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 84 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:06,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 378 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:40:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177394 states. [2022-12-14 13:40:16,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177394 to 166044. [2022-12-14 13:40:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166044 states, 142265 states have (on average 1.4149158260991812) internal successors, (201293), 142148 states have internal predecessors, (201293), 14110 states have call successors, (14110), 9240 states have call predecessors, (14110), 9668 states have return successors, (15136), 14656 states have call predecessors, (15136), 14110 states have call successors, (15136) [2022-12-14 13:40:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166044 states to 166044 states and 230539 transitions. [2022-12-14 13:40:17,188 INFO L78 Accepts]: Start accepts. Automaton has 166044 states and 230539 transitions. Word has length 115 [2022-12-14 13:40:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:17,188 INFO L495 AbstractCegarLoop]: Abstraction has 166044 states and 230539 transitions. [2022-12-14 13:40:17,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:40:17,188 INFO L276 IsEmpty]: Start isEmpty. Operand 166044 states and 230539 transitions. [2022-12-14 13:40:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 13:40:17,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:17,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:40:17,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:40:17,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:40:17,442 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1587138706, now seen corresponding path program 1 times [2022-12-14 13:40:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:17,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628392304] [2022-12-14 13:40:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:17,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:40:17,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628392304] [2022-12-14 13:40:17,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628392304] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:40:17,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051470840] [2022-12-14 13:40:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:17,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:17,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:40:17,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:40:17,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:40:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:17,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:40:17,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:17,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:40:17,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051470840] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:40:17,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:40:17,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:40:17,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790203445] [2022-12-14 13:40:17,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:40:17,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:40:17,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:40:17,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:40:17,720 INFO L87 Difference]: Start difference. First operand 166044 states and 230539 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:40:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:29,551 INFO L93 Difference]: Finished difference Result 317642 states and 443531 transitions. [2022-12-14 13:40:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:40:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 115 [2022-12-14 13:40:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:30,070 INFO L225 Difference]: With dead ends: 317642 [2022-12-14 13:40:30,070 INFO L226 Difference]: Without dead ends: 205222 [2022-12-14 13:40:30,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:40:30,209 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 78 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:30,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 373 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:40:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205222 states. [2022-12-14 13:40:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205222 to 195708. [2022-12-14 13:40:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195708 states, 169369 states have (on average 1.423430497906937) internal successors, (241085), 169252 states have internal predecessors, (241085), 15390 states have call successors, (15390), 10520 states have call predecessors, (15390), 10948 states have return successors, (16416), 15936 states have call predecessors, (16416), 15390 states have call successors, (16416) [2022-12-14 13:40:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195708 states to 195708 states and 272891 transitions. [2022-12-14 13:40:41,930 INFO L78 Accepts]: Start accepts. Automaton has 195708 states and 272891 transitions. Word has length 115 [2022-12-14 13:40:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:41,930 INFO L495 AbstractCegarLoop]: Abstraction has 195708 states and 272891 transitions. [2022-12-14 13:40:41,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:40:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 195708 states and 272891 transitions. [2022-12-14 13:40:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 13:40:41,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:41,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:40:41,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:40:42,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:40:42,166 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:42,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1009278068, now seen corresponding path program 1 times [2022-12-14 13:40:42,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:42,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095559365] [2022-12-14 13:40:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:42,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:40:42,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:42,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095559365] [2022-12-14 13:40:42,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095559365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:40:42,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:40:42,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:40:42,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344544290] [2022-12-14 13:40:42,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:40:42,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:40:42,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:40:42,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:40:42,208 INFO L87 Difference]: Start difference. First operand 195708 states and 272891 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 13:40:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:58,542 INFO L93 Difference]: Finished difference Result 490449 states and 685334 transitions. [2022-12-14 13:40:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:40:58,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 112 [2022-12-14 13:40:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:59,300 INFO L225 Difference]: With dead ends: 490449 [2022-12-14 13:40:59,300 INFO L226 Difference]: Without dead ends: 294746 [2022-12-14 13:40:59,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:40:59,571 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 134 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:59,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 295 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:40:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294746 states. [2022-12-14 13:41:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294746 to 292230. [2022-12-14 13:41:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292230 states, 253077 states have (on average 1.4104284466782837) internal successors, (356947), 252922 states have internal predecessors, (356947), 22792 states have call successors, (22792), 15732 states have call predecessors, (22792), 16360 states have return successors, (24260), 23576 states have call predecessors, (24260), 22792 states have call successors, (24260) [2022-12-14 13:41:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292230 states to 292230 states and 403999 transitions. [2022-12-14 13:41:17,548 INFO L78 Accepts]: Start accepts. Automaton has 292230 states and 403999 transitions. Word has length 112 [2022-12-14 13:41:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:41:17,549 INFO L495 AbstractCegarLoop]: Abstraction has 292230 states and 403999 transitions. [2022-12-14 13:41:17,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 13:41:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 292230 states and 403999 transitions. [2022-12-14 13:41:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 13:41:17,593 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:41:17,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:41:17,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 13:41:17,594 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:41:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:41:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash -552901602, now seen corresponding path program 1 times [2022-12-14 13:41:17,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:41:17,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849819290] [2022-12-14 13:41:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:41:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:41:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:41:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 13:41:17,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:41:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849819290] [2022-12-14 13:41:17,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849819290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:41:17,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:41:17,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:41:17,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382880000] [2022-12-14 13:41:17,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:41:17,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:41:17,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:41:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:41:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:41:17,636 INFO L87 Difference]: Start difference. First operand 292230 states and 403999 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:41:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:41:35,193 INFO L93 Difference]: Finished difference Result 478410 states and 669803 transitions. [2022-12-14 13:41:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:41:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 113 [2022-12-14 13:41:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:41:36,116 INFO L225 Difference]: With dead ends: 478410 [2022-12-14 13:41:36,117 INFO L226 Difference]: Without dead ends: 292230 [2022-12-14 13:41:36,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:41:36,463 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 310 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:41:36,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 462 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:41:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292230 states. [2022-12-14 13:41:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292230 to 287622. [2022-12-14 13:41:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287622 states, 248469 states have (on average 1.394206118268275) internal successors, (346417), 248314 states have internal predecessors, (346417), 22792 states have call successors, (22792), 15732 states have call predecessors, (22792), 16360 states have return successors, (24260), 23576 states have call predecessors, (24260), 22792 states have call successors, (24260) [2022-12-14 13:41:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287622 states to 287622 states and 393469 transitions. [2022-12-14 13:41:54,868 INFO L78 Accepts]: Start accepts. Automaton has 287622 states and 393469 transitions. Word has length 113 [2022-12-14 13:41:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:41:54,868 INFO L495 AbstractCegarLoop]: Abstraction has 287622 states and 393469 transitions. [2022-12-14 13:41:54,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:41:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 287622 states and 393469 transitions. [2022-12-14 13:41:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 13:41:54,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:41:54,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:41:54,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 13:41:54,913 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:41:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:41:54,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1037493375, now seen corresponding path program 1 times [2022-12-14 13:41:54,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:41:54,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029991928] [2022-12-14 13:41:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:41:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:41:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:41:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:41:54,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:41:54,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029991928] [2022-12-14 13:41:54,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029991928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:41:54,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:41:54,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:41:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729706625] [2022-12-14 13:41:55,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:41:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:41:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:41:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:41:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:41:55,000 INFO L87 Difference]: Start difference. First operand 287622 states and 393469 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:42:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:42:17,298 INFO L93 Difference]: Finished difference Result 475590 states and 651158 transitions. [2022-12-14 13:42:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:42:17,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 113 [2022-12-14 13:42:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:42:18,224 INFO L225 Difference]: With dead ends: 475590 [2022-12-14 13:42:18,224 INFO L226 Difference]: Without dead ends: 349266 [2022-12-14 13:42:18,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:42:18,420 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 179 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:42:18,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 400 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:42:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349266 states. [2022-12-14 13:42:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349266 to 347556. [2022-12-14 13:42:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347556 states, 305514 states have (on average 1.3762282579521723) internal successors, (420457), 305458 states have internal predecessors, (420457), 23182 states have call successors, (23182), 18066 states have call predecessors, (23182), 18859 states have return successors, (25787), 24032 states have call predecessors, (25787), 23182 states have call successors, (25787) [2022-12-14 13:42:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347556 states to 347556 states and 469426 transitions. [2022-12-14 13:42:43,045 INFO L78 Accepts]: Start accepts. Automaton has 347556 states and 469426 transitions. Word has length 113 [2022-12-14 13:42:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:42:43,045 INFO L495 AbstractCegarLoop]: Abstraction has 347556 states and 469426 transitions. [2022-12-14 13:42:43,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:42:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 347556 states and 469426 transitions. [2022-12-14 13:42:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 13:42:43,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:42:43,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:42:43,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 13:42:43,099 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:42:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:42:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1498743995, now seen corresponding path program 1 times [2022-12-14 13:42:43,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:42:43,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521445194] [2022-12-14 13:42:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:42:43,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:42:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:42:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:42:43,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:42:43,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521445194] [2022-12-14 13:42:43,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521445194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:42:43,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:42:43,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:42:43,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057524777] [2022-12-14 13:42:43,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:42:43,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:42:43,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:42:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:42:43,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:42:43,244 INFO L87 Difference]: Start difference. First operand 347556 states and 469426 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:43:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:43:16,994 INFO L93 Difference]: Finished difference Result 661286 states and 894535 transitions. [2022-12-14 13:43:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:43:16,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 114 [2022-12-14 13:43:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:43:18,413 INFO L225 Difference]: With dead ends: 661286 [2022-12-14 13:43:18,413 INFO L226 Difference]: Without dead ends: 481056 [2022-12-14 13:43:18,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:43:18,752 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 140 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:43:18,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 560 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:43:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481056 states. [2022-12-14 13:43:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481056 to 431340. [2022-12-14 13:43:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431340 states, 376707 states have (on average 1.360641028704006) internal successors, (512563), 375922 states have internal predecessors, (512563), 31057 states have call successors, (31057), 23511 states have call predecessors, (31057), 23575 states have return successors, (34733), 31907 states have call predecessors, (34733), 31057 states have call successors, (34733) [2022-12-14 13:43:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431340 states to 431340 states and 578353 transitions. [2022-12-14 13:43:52,674 INFO L78 Accepts]: Start accepts. Automaton has 431340 states and 578353 transitions. Word has length 114 [2022-12-14 13:43:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:43:52,675 INFO L495 AbstractCegarLoop]: Abstraction has 431340 states and 578353 transitions. [2022-12-14 13:43:52,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:43:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 431340 states and 578353 transitions. [2022-12-14 13:43:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 13:43:52,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:43:52,912 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 13:43:52,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 13:43:52,912 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:43:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:43:52,913 INFO L85 PathProgramCache]: Analyzing trace with hash -107403483, now seen corresponding path program 1 times [2022-12-14 13:43:52,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:43:52,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982393988] [2022-12-14 13:43:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:43:52,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:43:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:43:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:43:53,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:43:53,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982393988] [2022-12-14 13:43:53,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982393988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:43:53,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174581663] [2022-12-14 13:43:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:43:53,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:43:53,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:43:53,195 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:43:53,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:43:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:43:53,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:43:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:43:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:43:53,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:43:53,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174581663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:43:53,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:43:53,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2022-12-14 13:43:53,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648713059] [2022-12-14 13:43:53,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:43:53,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:43:53,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:43:53,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:43:53,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:43:53,394 INFO L87 Difference]: Start difference. First operand 431340 states and 578353 transitions. Second operand has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 13:44:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:44:21,570 INFO L93 Difference]: Finished difference Result 838173 states and 1145621 transitions. [2022-12-14 13:44:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 13:44:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 134 [2022-12-14 13:44:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:44:22,608 INFO L225 Difference]: With dead ends: 838173 [2022-12-14 13:44:22,608 INFO L226 Difference]: Without dead ends: 406839 [2022-12-14 13:44:23,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:44:23,050 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 710 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:44:23,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 1426 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:44:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406839 states. [2022-12-14 13:44:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406839 to 304861. [2022-12-14 13:44:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304861 states, 270774 states have (on average 1.3732226875549352) internal successors, (371833), 270597 states have internal predecessors, (371833), 18384 states have call successors, (18384), 15156 states have call predecessors, (18384), 15702 states have return successors, (20404), 19108 states have call predecessors, (20404), 18384 states have call successors, (20404) [2022-12-14 13:44:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304861 states to 304861 states and 410621 transitions. [2022-12-14 13:44:46,413 INFO L78 Accepts]: Start accepts. Automaton has 304861 states and 410621 transitions. Word has length 134 [2022-12-14 13:44:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:44:46,414 INFO L495 AbstractCegarLoop]: Abstraction has 304861 states and 410621 transitions. [2022-12-14 13:44:46,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 13:44:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 304861 states and 410621 transitions. [2022-12-14 13:44:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 13:44:46,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:44:46,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:44:46,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:44:47,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 13:44:47,066 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:44:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:44:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash -957702708, now seen corresponding path program 1 times [2022-12-14 13:44:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:44:47,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304440599] [2022-12-14 13:44:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:44:47,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:44:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:44:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 13:44:47,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:44:47,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304440599] [2022-12-14 13:44:47,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304440599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:44:47,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242465758] [2022-12-14 13:44:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:44:47,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:44:47,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:44:47,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:44:47,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:44:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:44:47,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:44:47,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:44:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 13:44:47,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:44:47,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242465758] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:44:47,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:44:47,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:44:47,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588759491] [2022-12-14 13:44:47,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:44:47,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:44:47,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:44:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:44:47,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:44:47,434 INFO L87 Difference]: Start difference. First operand 304861 states and 410621 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 13:45:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:11,750 INFO L93 Difference]: Finished difference Result 435110 states and 587989 transitions. [2022-12-14 13:45:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:45:11,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 147 [2022-12-14 13:45:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:12,490 INFO L225 Difference]: With dead ends: 435110 [2022-12-14 13:45:12,490 INFO L226 Difference]: Without dead ends: 339626 [2022-12-14 13:45:12,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:45:12,635 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 81 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:12,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 281 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339626 states. [2022-12-14 13:45:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339626 to 301970. [2022-12-14 13:45:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301970 states, 268225 states have (on average 1.3697828315779663) internal successors, (367410), 267996 states have internal predecessors, (367410), 18309 states have call successors, (18309), 15099 states have call predecessors, (18309), 15435 states have return successors, (19973), 18875 states have call predecessors, (19973), 18309 states have call successors, (19973) [2022-12-14 13:45:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301970 states to 301970 states and 405692 transitions. [2022-12-14 13:45:37,451 INFO L78 Accepts]: Start accepts. Automaton has 301970 states and 405692 transitions. Word has length 147 [2022-12-14 13:45:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:37,452 INFO L495 AbstractCegarLoop]: Abstraction has 301970 states and 405692 transitions. [2022-12-14 13:45:37,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 13:45:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 301970 states and 405692 transitions. [2022-12-14 13:45:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 13:45:37,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:37,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:37,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:45:38,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 13:45:38,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:45:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1071089365, now seen corresponding path program 1 times [2022-12-14 13:45:38,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:38,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105077068] [2022-12-14 13:45:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:38,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 13:45:38,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:38,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105077068] [2022-12-14 13:45:38,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105077068] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:38,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431223559] [2022-12-14 13:45:38,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:38,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:38,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:38,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:38,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:45:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:45:38,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:45:38,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:45:38,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431223559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:38,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:45:38,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:45:38,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33184899] [2022-12-14 13:45:38,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:38,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:45:38,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:45:38,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:45:38,466 INFO L87 Difference]: Start difference. First operand 301970 states and 405692 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 13:46:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:04,303 INFO L93 Difference]: Finished difference Result 472642 states and 637391 transitions. [2022-12-14 13:46:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:46:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 147 [2022-12-14 13:46:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:05,079 INFO L225 Difference]: With dead ends: 472642 [2022-12-14 13:46:05,079 INFO L226 Difference]: Without dead ends: 343715 [2022-12-14 13:46:05,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:46:05,253 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 83 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:05,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 281 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:46:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343715 states. [2022-12-14 13:46:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343715 to 294769. [2022-12-14 13:46:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294769 states, 261687 states have (on average 1.3663919109470475) internal successors, (357567), 261399 states have internal predecessors, (357567), 18111 states have call successors, (18111), 14937 states have call predecessors, (18111), 14970 states have return successors, (19267), 18433 states have call predecessors, (19267), 18111 states have call successors, (19267) [2022-12-14 13:46:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294769 states to 294769 states and 394945 transitions. [2022-12-14 13:46:29,754 INFO L78 Accepts]: Start accepts. Automaton has 294769 states and 394945 transitions. Word has length 147 [2022-12-14 13:46:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:29,754 INFO L495 AbstractCegarLoop]: Abstraction has 294769 states and 394945 transitions. [2022-12-14 13:46:29,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 13:46:29,755 INFO L276 IsEmpty]: Start isEmpty. Operand 294769 states and 394945 transitions. [2022-12-14 13:46:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 13:46:30,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:30,022 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:30,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:46:30,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:30,224 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:30,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1166273900, now seen corresponding path program 1 times [2022-12-14 13:46:30,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:30,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171357428] [2022-12-14 13:46:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:30,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 13:46:30,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:30,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171357428] [2022-12-14 13:46:30,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171357428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:30,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632912560] [2022-12-14 13:46:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:30,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:30,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:30,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:30,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a118e1-705c-4527-8fba-7095baefaf78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:46:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:30,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 13:46:30,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:46:30,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:46:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 13:46:31,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632912560] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:46:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [223276140] [2022-12-14 13:46:31,107 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-12-14 13:46:31,107 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:46:31,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:46:31,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:46:31,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:46:43,267 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 129 for LOIs [2022-12-14 13:46:43,299 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2022-12-14 13:46:43,399 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjuctions. This might take some time... [2022-12-14 13:46:58,735 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjuctions. [2022-12-14 13:46:59,030 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2022-12-14 13:46:59,123 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjuctions. This might take some time... [2022-12-14 13:47:15,609 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjuctions.