./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label38.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/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_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label38.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/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_4a980b63-84d1-487c-8e27-a4183d7c137d/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 d6ab095cb4c47e2e0ab83610e7dceb2c658ebc8f7a2b4be1c26690c64da4af60 --- 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 10:41:25,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:41:25,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:41:25,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:41:25,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:41:25,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:41:25,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:41:25,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:41:25,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:41:25,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:41:25,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:41:25,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:41:25,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:41:25,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:41:25,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:41:25,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:41:25,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:41:25,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:41:25,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:41:25,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:41:26,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:41:26,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:41:26,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:41:26,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:41:26,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:41:26,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:41:26,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:41:26,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:41:26,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:41:26,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:41:26,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:41:26,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:41:26,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:41:26,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:41:26,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:41:26,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:41:26,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:41:26,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:41:26,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:41:26,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:41:26,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:41:26,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:41:26,037 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:41:26,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:41:26,038 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:41:26,038 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:41:26,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:41:26,039 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:41:26,039 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:41:26,040 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:41:26,040 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:41:26,040 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:41:26,040 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:41:26,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:41:26,041 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:41:26,041 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:41:26,041 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:41:26,041 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:41:26,041 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:41:26,041 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:41:26,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:41:26,042 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:41:26,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:41:26,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:41:26,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:41:26,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:41:26,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:41:26,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:41:26,043 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:41:26,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:41:26,044 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:41:26,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:41:26,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:41:26,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:41:26,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:41:26,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:41:26,045 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:41:26,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:41:26,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:41:26,045 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:41:26,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:41:26,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:41:26,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:41:26,046 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_4a980b63-84d1-487c-8e27-a4183d7c137d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6ab095cb4c47e2e0ab83610e7dceb2c658ebc8f7a2b4be1c26690c64da4af60 [2022-12-14 10:41:26,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:41:26,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:41:26,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:41:26,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:41:26,255 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:41:26,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label38.c [2022-12-14 10:41:28,875 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:41:29,089 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:41:29,090 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/sv-benchmarks/c/eca-rers2012/Problem03_label38.c [2022-12-14 10:41:29,100 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/data/371e48640/1942666515114396a2dfc3805e57604f/FLAG370d8f388 [2022-12-14 10:41:29,110 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/data/371e48640/1942666515114396a2dfc3805e57604f [2022-12-14 10:41:29,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:41:29,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:41:29,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:41:29,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:41:29,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:41:29,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db9564e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29, skipping insertion in model container [2022-12-14 10:41:29,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:41:29,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:41:29,523 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_4a980b63-84d1-487c-8e27-a4183d7c137d/sv-benchmarks/c/eca-rers2012/Problem03_label38.c[61364,61377] [2022-12-14 10:41:29,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:41:29,546 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:41:29,714 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_4a980b63-84d1-487c-8e27-a4183d7c137d/sv-benchmarks/c/eca-rers2012/Problem03_label38.c[61364,61377] [2022-12-14 10:41:29,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:41:29,731 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:41:29,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29 WrapperNode [2022-12-14 10:41:29,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:41:29,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:41:29,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:41:29,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:41:29,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,839 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 10:41:29,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:41:29,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:41:29,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:41:29,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:41:29,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,908 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:41:29,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:41:29,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:41:29,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:41:29,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (1/1) ... [2022-12-14 10:41:29,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:41:29,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:29,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:41:29,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:41:29,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:41:29,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:41:29,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:41:29,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:41:30,054 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:41:30,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:41:31,361 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:41:31,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:41:31,547 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 10:41:31,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:41:31 BoogieIcfgContainer [2022-12-14 10:41:31,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:41:31,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:41:31,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:41:31,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:41:31,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:41:29" (1/3) ... [2022-12-14 10:41:31,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e8c35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:41:31, skipping insertion in model container [2022-12-14 10:41:31,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:29" (2/3) ... [2022-12-14 10:41:31,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e8c35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:41:31, skipping insertion in model container [2022-12-14 10:41:31,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:41:31" (3/3) ... [2022-12-14 10:41:31,555 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label38.c [2022-12-14 10:41:31,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:41:31,569 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:41:31,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:41:31,610 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;@7d2a101d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:41:31,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:41:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:31,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 10:41:31,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:31,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:31,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 209355451, now seen corresponding path program 1 times [2022-12-14 10:41:31,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:31,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122021129] [2022-12-14 10:41:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:32,130 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 10:41:32,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:32,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122021129] [2022-12-14 10:41:32,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122021129] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:32,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:32,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:41:32,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606989909] [2022-12-14 10:41:32,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:32,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:32,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:32,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:41:32,159 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:32,801 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 10:41:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 10:41:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:32,811 INFO L225 Difference]: With dead ends: 440 [2022-12-14 10:41:32,811 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 10:41:32,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:41:32,816 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:32,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 51 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:41:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 10:41:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 10:41:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.7881944444444444) internal successors, (515), 288 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 515 transitions. [2022-12-14 10:41:32,854 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 515 transitions. Word has length 143 [2022-12-14 10:41:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:32,855 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 515 transitions. [2022-12-14 10:41:32,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 515 transitions. [2022-12-14 10:41:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 10:41:32,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:32,857 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:32,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:41:32,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1094395738, now seen corresponding path program 1 times [2022-12-14 10:41:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:32,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285370888] [2022-12-14 10:41:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:32,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:41:33,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:33,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285370888] [2022-12-14 10:41:33,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285370888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:33,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:33,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:41:33,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569741015] [2022-12-14 10:41:33,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:33,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:33,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:33,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:33,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:41:33,003 INFO L87 Difference]: Start difference. First operand 289 states and 515 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:33,510 INFO L93 Difference]: Finished difference Result 863 states and 1542 transitions. [2022-12-14 10:41:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:33,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 10:41:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:33,515 INFO L225 Difference]: With dead ends: 863 [2022-12-14 10:41:33,515 INFO L226 Difference]: Without dead ends: 575 [2022-12-14 10:41:33,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:41:33,517 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:33,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 25 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:41:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-12-14 10:41:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-12-14 10:41:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.740418118466899) internal successors, (999), 574 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 999 transitions. [2022-12-14 10:41:33,534 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 999 transitions. Word has length 151 [2022-12-14 10:41:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:33,534 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 999 transitions. [2022-12-14 10:41:33,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:33,534 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 999 transitions. [2022-12-14 10:41:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 10:41:33,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:33,537 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:33,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:41:33,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1051091711, now seen corresponding path program 1 times [2022-12-14 10:41:33,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:33,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447564012] [2022-12-14 10:41:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:33,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:41:33,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447564012] [2022-12-14 10:41:33,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447564012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:33,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:33,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:41:33,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927303611] [2022-12-14 10:41:33,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:33,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:41:33,736 INFO L87 Difference]: Start difference. First operand 575 states and 999 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:34,383 INFO L93 Difference]: Finished difference Result 1721 states and 2994 transitions. [2022-12-14 10:41:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-12-14 10:41:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:34,388 INFO L225 Difference]: With dead ends: 1721 [2022-12-14 10:41:34,389 INFO L226 Difference]: Without dead ends: 1147 [2022-12-14 10:41:34,390 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 10:41:34,390 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 151 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:34,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 262 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:41:34,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-12-14 10:41:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-12-14 10:41:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4764397905759161) internal successors, (1692), 1146 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1692 transitions. [2022-12-14 10:41:34,412 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1692 transitions. Word has length 163 [2022-12-14 10:41:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:34,412 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1692 transitions. [2022-12-14 10:41:34,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1692 transitions. [2022-12-14 10:41:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 10:41:34,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:34,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:34,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:41:34,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1982526328, now seen corresponding path program 1 times [2022-12-14 10:41:34,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:34,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843979253] [2022-12-14 10:41:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:34,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:41:34,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:34,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843979253] [2022-12-14 10:41:34,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843979253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:34,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:34,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:41:34,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048643150] [2022-12-14 10:41:34,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:34,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:34,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:41:34,546 INFO L87 Difference]: Start difference. First operand 1147 states and 1692 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:35,166 INFO L93 Difference]: Finished difference Result 3437 states and 5073 transitions. [2022-12-14 10:41:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:35,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-12-14 10:41:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:35,174 INFO L225 Difference]: With dead ends: 3437 [2022-12-14 10:41:35,174 INFO L226 Difference]: Without dead ends: 2291 [2022-12-14 10:41:35,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:41:35,177 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 155 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:35,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 68 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:41:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-12-14 10:41:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-12-14 10:41:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4013100436681223) internal successors, (3209), 2290 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3209 transitions. [2022-12-14 10:41:35,232 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3209 transitions. Word has length 166 [2022-12-14 10:41:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:35,233 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3209 transitions. [2022-12-14 10:41:35,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3209 transitions. [2022-12-14 10:41:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 10:41:35,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:35,244 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:35,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:41:35,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:35,245 INFO L85 PathProgramCache]: Analyzing trace with hash 441270849, now seen corresponding path program 1 times [2022-12-14 10:41:35,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:35,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310271682] [2022-12-14 10:41:35,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:35,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 10:41:35,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:35,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310271682] [2022-12-14 10:41:35,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310271682] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:35,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:35,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:41:35,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130238356] [2022-12-14 10:41:35,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:35,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:35,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:35,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:35,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:41:35,406 INFO L87 Difference]: Start difference. First operand 2291 states and 3209 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:35,712 INFO L93 Difference]: Finished difference Result 4581 states and 6417 transitions. [2022-12-14 10:41:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2022-12-14 10:41:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:35,721 INFO L225 Difference]: With dead ends: 4581 [2022-12-14 10:41:35,721 INFO L226 Difference]: Without dead ends: 2291 [2022-12-14 10:41:35,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:41:35,725 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:35,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:41:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-12-14 10:41:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-12-14 10:41:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3611353711790393) internal successors, (3117), 2290 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3117 transitions. [2022-12-14 10:41:35,779 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3117 transitions. Word has length 176 [2022-12-14 10:41:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:35,779 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3117 transitions. [2022-12-14 10:41:35,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3117 transitions. [2022-12-14 10:41:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-12-14 10:41:35,783 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:35,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:35,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:41:35,783 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2067546140, now seen corresponding path program 1 times [2022-12-14 10:41:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:35,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160483972] [2022-12-14 10:41:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:35,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:41:36,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160483972] [2022-12-14 10:41:36,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160483972] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:36,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:36,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:41:36,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667931951] [2022-12-14 10:41:36,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:36,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:36,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:41:36,104 INFO L87 Difference]: Start difference. First operand 2291 states and 3117 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:36,642 INFO L93 Difference]: Finished difference Result 5725 states and 7760 transitions. [2022-12-14 10:41:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2022-12-14 10:41:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:36,649 INFO L225 Difference]: With dead ends: 5725 [2022-12-14 10:41:36,649 INFO L226 Difference]: Without dead ends: 3435 [2022-12-14 10:41:36,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:41:36,652 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 116 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:36,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 79 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:41:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-12-14 10:41:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-12-14 10:41:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.3383808969132207) internal successors, (4596), 3434 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4596 transitions. [2022-12-14 10:41:36,703 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4596 transitions. Word has length 184 [2022-12-14 10:41:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:36,703 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4596 transitions. [2022-12-14 10:41:36,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4596 transitions. [2022-12-14 10:41:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-12-14 10:41:36,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:36,708 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:36,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:41:36,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1304621313, now seen corresponding path program 1 times [2022-12-14 10:41:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:36,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126802571] [2022-12-14 10:41:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:36,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:41:37,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:37,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126802571] [2022-12-14 10:41:37,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126802571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:41:37,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452853763] [2022-12-14 10:41:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:37,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:37,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:37,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:41:37,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:41:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:37,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:41:37,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:41:37,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:41:37,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452853763] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:37,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:41:37,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 10:41:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224004016] [2022-12-14 10:41:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:37,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:37,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:37,378 INFO L87 Difference]: Start difference. First operand 3435 states and 4596 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:37,904 INFO L93 Difference]: Finished difference Result 9443 states and 12723 transitions. [2022-12-14 10:41:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:37,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-12-14 10:41:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:37,918 INFO L225 Difference]: With dead ends: 9443 [2022-12-14 10:41:37,919 INFO L226 Difference]: Without dead ends: 6152 [2022-12-14 10:41:37,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:37,923 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:37,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 236 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:41:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2022-12-14 10:41:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 6152. [2022-12-14 10:41:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 1.305641359128597) internal successors, (8031), 6151 states have internal predecessors, (8031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 8031 transitions. [2022-12-14 10:41:38,011 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 8031 transitions. Word has length 191 [2022-12-14 10:41:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:38,012 INFO L495 AbstractCegarLoop]: Abstraction has 6152 states and 8031 transitions. [2022-12-14 10:41:38,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 8031 transitions. [2022-12-14 10:41:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-14 10:41:38,018 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:38,018 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:38,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:41:38,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:41:38,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash 633580862, now seen corresponding path program 1 times [2022-12-14 10:41:38,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:38,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906195331] [2022-12-14 10:41:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:41:38,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906195331] [2022-12-14 10:41:38,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906195331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:41:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523806430] [2022-12-14 10:41:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:38,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:38,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:38,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:41:38,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:41:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:38,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:41:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:41:38,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:41:38,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523806430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:38,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:41:38,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 10:41:38,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3977000] [2022-12-14 10:41:38,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:38,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:38,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:38,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:38,800 INFO L87 Difference]: Start difference. First operand 6152 states and 8031 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:39,275 INFO L93 Difference]: Finished difference Result 15020 states and 20141 transitions. [2022-12-14 10:41:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:39,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2022-12-14 10:41:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:39,289 INFO L225 Difference]: With dead ends: 15020 [2022-12-14 10:41:39,289 INFO L226 Difference]: Without dead ends: 8869 [2022-12-14 10:41:39,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:39,294 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 137 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:39,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:41:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8869 states. [2022-12-14 10:41:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8869 to 8869. [2022-12-14 10:41:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8869 states, 8868 states have (on average 1.2536084799278304) internal successors, (11117), 8868 states have internal predecessors, (11117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8869 states to 8869 states and 11117 transitions. [2022-12-14 10:41:39,440 INFO L78 Accepts]: Start accepts. Automaton has 8869 states and 11117 transitions. Word has length 210 [2022-12-14 10:41:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:39,440 INFO L495 AbstractCegarLoop]: Abstraction has 8869 states and 11117 transitions. [2022-12-14 10:41:39,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:41:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 8869 states and 11117 transitions. [2022-12-14 10:41:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-14 10:41:39,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:39,455 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:39,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 10:41:39,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 10:41:39,656 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash 831396787, now seen corresponding path program 1 times [2022-12-14 10:41:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:39,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864586033] [2022-12-14 10:41:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:39,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:41:40,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:40,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864586033] [2022-12-14 10:41:40,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864586033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:41:40,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134235044] [2022-12-14 10:41:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:40,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:40,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:40,502 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:41:40,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:41:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:40,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:41:40,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:41:40,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:41:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:41:41,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134235044] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:41:41,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730577063] [2022-12-14 10:41:41,078 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 10:41:41,078 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:41:41,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:41:41,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:41:41,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:42:00,840 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2022-12-14 10:42:00,930 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6312 conjuctions. This might take some time... [2022-12-14 10:42:00,980 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 38 conjuctions. [2022-12-14 10:42:00,983 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2022-12-14 10:42:01,064 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6312 conjuctions. This might take some time... [2022-12-14 10:42:01,113 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 38 conjuctions. [2022-12-14 10:42:01,170 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2022-12-14 10:42:01,249 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6312 conjuctions. This might take some time... [2022-12-14 10:42:01,298 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 38 conjuctions. [2022-12-14 10:42:03,858 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:42:13,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [730577063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:13,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:42:13,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4, 4] total 15 [2022-12-14 10:42:13,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820387639] [2022-12-14 10:42:13,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:13,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 10:42:13,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:13,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 10:42:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:42:13,025 INFO L87 Difference]: Start difference. First operand 8869 states and 11117 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:42:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:15,798 INFO L93 Difference]: Finished difference Result 17881 states and 22410 transitions. [2022-12-14 10:42:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:42:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2022-12-14 10:42:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:15,812 INFO L225 Difference]: With dead ends: 17881 [2022-12-14 10:42:15,812 INFO L226 Difference]: Without dead ends: 9156 [2022-12-14 10:42:15,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 501 SyntacticMatches, 151 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:42:15,818 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 226 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:15,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 113 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 10:42:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9156 states. [2022-12-14 10:42:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9156 to 9146. [2022-12-14 10:42:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9146 states, 9145 states have (on average 1.2478950246036085) internal successors, (11412), 9145 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:42:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9146 states to 9146 states and 11412 transitions. [2022-12-14 10:42:15,914 INFO L78 Accepts]: Start accepts. Automaton has 9146 states and 11412 transitions. Word has length 221 [2022-12-14 10:42:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:15,915 INFO L495 AbstractCegarLoop]: Abstraction has 9146 states and 11412 transitions. [2022-12-14 10:42:15,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:42:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9146 states and 11412 transitions. [2022-12-14 10:42:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-12-14 10:42:15,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:15,924 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:42:15,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:42:16,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:42:16,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:16,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:16,125 INFO L85 PathProgramCache]: Analyzing trace with hash -348311603, now seen corresponding path program 1 times [2022-12-14 10:42:16,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:16,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399616106] [2022-12-14 10:42:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:42:16,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399616106] [2022-12-14 10:42:16,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399616106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:16,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:42:16,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:42:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250681992] [2022-12-14 10:42:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:42:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:42:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:42:16,258 INFO L87 Difference]: Start difference. First operand 9146 states and 11412 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:42:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:16,781 INFO L93 Difference]: Finished difference Result 20731 states and 26126 transitions. [2022-12-14 10:42:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:42:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2022-12-14 10:42:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:16,802 INFO L225 Difference]: With dead ends: 20731 [2022-12-14 10:42:16,802 INFO L226 Difference]: Without dead ends: 12006 [2022-12-14 10:42:16,809 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 10:42:16,809 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 161 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:16,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 210 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:42:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12006 states. [2022-12-14 10:42:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12006 to 12006. [2022-12-14 10:42:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12006 states, 12005 states have (on average 1.226905456059975) internal successors, (14729), 12005 states have internal predecessors, (14729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:42:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12006 states to 12006 states and 14729 transitions. [2022-12-14 10:42:16,932 INFO L78 Accepts]: Start accepts. Automaton has 12006 states and 14729 transitions. Word has length 258 [2022-12-14 10:42:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:16,932 INFO L495 AbstractCegarLoop]: Abstraction has 12006 states and 14729 transitions. [2022-12-14 10:42:16,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:42:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 12006 states and 14729 transitions. [2022-12-14 10:42:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-12-14 10:42:16,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:16,941 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:42:16,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 10:42:16,942 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:16,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1965058739, now seen corresponding path program 1 times [2022-12-14 10:42:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:16,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136554739] [2022-12-14 10:42:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 10:42:17,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136554739] [2022-12-14 10:42:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136554739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:17,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:42:17,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:42:17,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186578207] [2022-12-14 10:42:17,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:17,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:42:17,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:17,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:42:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:42:17,175 INFO L87 Difference]: Start difference. First operand 12006 states and 14729 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:42:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:17,738 INFO L93 Difference]: Finished difference Result 23591 states and 28998 transitions. [2022-12-14 10:42:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:42:17,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-12-14 10:42:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:17,755 INFO L225 Difference]: With dead ends: 23591 [2022-12-14 10:42:17,755 INFO L226 Difference]: Without dead ends: 12006 [2022-12-14 10:42:17,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:42:17,763 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 436 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:17,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 10 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:42:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12006 states. [2022-12-14 10:42:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12006 to 12006. [2022-12-14 10:42:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12006 states, 12005 states have (on average 1.2146605581007914) internal successors, (14582), 12005 states have internal predecessors, (14582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:42:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12006 states to 12006 states and 14582 transitions. [2022-12-14 10:42:17,883 INFO L78 Accepts]: Start accepts. Automaton has 12006 states and 14582 transitions. Word has length 270 [2022-12-14 10:42:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:17,883 INFO L495 AbstractCegarLoop]: Abstraction has 12006 states and 14582 transitions. [2022-12-14 10:42:17,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:42:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 12006 states and 14582 transitions. [2022-12-14 10:42:17,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-12-14 10:42:17,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:17,892 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:42:17,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:42:17,892 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1739233410, now seen corresponding path program 1 times [2022-12-14 10:42:17,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:17,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133830512] [2022-12-14 10:42:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:17,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:42:18,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:18,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133830512] [2022-12-14 10:42:18,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133830512] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:42:18,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815592139] [2022-12-14 10:42:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:18,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:42:18,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:42:18,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:42:18,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:42:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:18,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:42:18,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:42:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:42:18,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:42:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:42:19,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815592139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:42:19,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488849232] [2022-12-14 10:42:19,014 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 10:42:19,014 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:42:19,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:42:19,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:42:19,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:47:58,138 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2022-12-14 10:47:58,659 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 50496 conjuctions. This might take some time... [2022-12-14 10:48:01,804 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 304 conjuctions. [2022-12-14 10:48:01,820 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2022-12-14 10:48:02,389 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 50496 conjuctions. This might take some time... [2022-12-14 10:48:05,486 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 304 conjuctions. [2022-12-14 10:48:06,109 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2022-12-14 10:48:06,611 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 50496 conjuctions. This might take some time... [2022-12-14 10:48:09,744 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 304 conjuctions. [2022-12-14 10:48:43,034 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:49:02,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [488849232] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:02,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:49:02,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 3, 3] total 12 [2022-12-14 10:49:02,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182171725] [2022-12-14 10:49:02,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:02,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:49:02,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:49:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:49:02,195 INFO L87 Difference]: Start difference. First operand 12006 states and 14582 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:07,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:07,348 INFO L93 Difference]: Finished difference Result 23896 states and 29176 transitions. [2022-12-14 10:49:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:49:07,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2022-12-14 10:49:07,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:07,360 INFO L225 Difference]: With dead ends: 23896 [2022-12-14 10:49:07,360 INFO L226 Difference]: Without dead ends: 12311 [2022-12-14 10:49:07,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 557 SyntacticMatches, 247 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:49:07,366 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 277 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:07,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 114 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 10:49:07,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12311 states. [2022-12-14 10:49:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12311 to 12290. [2022-12-14 10:49:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12290 states, 12289 states have (on average 1.2188135731141672) internal successors, (14978), 12289 states have internal predecessors, (14978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12290 states to 12290 states and 14978 transitions. [2022-12-14 10:49:07,492 INFO L78 Accepts]: Start accepts. Automaton has 12290 states and 14978 transitions. Word has length 271 [2022-12-14 10:49:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:49:07,492 INFO L495 AbstractCegarLoop]: Abstraction has 12290 states and 14978 transitions. [2022-12-14 10:49:07,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 12290 states and 14978 transitions. [2022-12-14 10:49:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-12-14 10:49:07,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:49:07,500 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:49:07,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:49:07,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:49:07,702 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:49:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:49:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1625779951, now seen corresponding path program 1 times [2022-12-14 10:49:07,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:49:07,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038722981] [2022-12-14 10:49:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:07,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:49:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 143 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 10:49:08,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:49:08,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038722981] [2022-12-14 10:49:08,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038722981] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:49:08,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685641662] [2022-12-14 10:49:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:08,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:49:08,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:49:08,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:49:08,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:49:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:08,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:49:08,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:49:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 10:49:08,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:49:08,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685641662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:08,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:49:08,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 10:49:08,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436542053] [2022-12-14 10:49:08,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:08,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:49:08,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:08,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:49:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:08,258 INFO L87 Difference]: Start difference. First operand 12290 states and 14978 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:08,783 INFO L93 Difference]: Finished difference Result 28737 states and 35400 transitions. [2022-12-14 10:49:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:49:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2022-12-14 10:49:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:08,798 INFO L225 Difference]: With dead ends: 28737 [2022-12-14 10:49:08,798 INFO L226 Difference]: Without dead ends: 17152 [2022-12-14 10:49:08,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:08,806 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 132 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:08,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 238 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:49:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17152 states. [2022-12-14 10:49:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17152 to 17152. [2022-12-14 10:49:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17152 states, 17151 states have (on average 1.2226692321147454) internal successors, (20970), 17151 states have internal predecessors, (20970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17152 states to 17152 states and 20970 transitions. [2022-12-14 10:49:08,990 INFO L78 Accepts]: Start accepts. Automaton has 17152 states and 20970 transitions. Word has length 281 [2022-12-14 10:49:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:49:08,991 INFO L495 AbstractCegarLoop]: Abstraction has 17152 states and 20970 transitions. [2022-12-14 10:49:08,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 17152 states and 20970 transitions. [2022-12-14 10:49:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-12-14 10:49:09,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:49:09,003 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:49:09,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:49:09,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 10:49:09,205 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:49:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:49:09,207 INFO L85 PathProgramCache]: Analyzing trace with hash -545381903, now seen corresponding path program 1 times [2022-12-14 10:49:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:49:09,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857940703] [2022-12-14 10:49:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:49:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 148 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:49:09,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:49:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857940703] [2022-12-14 10:49:09,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857940703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:49:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958166018] [2022-12-14 10:49:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:09,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:49:09,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:49:09,606 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:49:09,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:49:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:49:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:49:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 10:49:10,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:49:10,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958166018] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:10,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:49:10,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 10:49:10,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987401171] [2022-12-14 10:49:10,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:10,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:49:10,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:10,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:49:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:10,255 INFO L87 Difference]: Start difference. First operand 17152 states and 20970 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:10,854 INFO L93 Difference]: Finished difference Result 36459 states and 44810 transitions. [2022-12-14 10:49:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:49:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2022-12-14 10:49:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:10,870 INFO L225 Difference]: With dead ends: 36459 [2022-12-14 10:49:10,871 INFO L226 Difference]: Without dead ends: 20012 [2022-12-14 10:49:10,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:10,881 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:10,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:49:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20012 states. [2022-12-14 10:49:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20012 to 18709. [2022-12-14 10:49:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18709 states, 18708 states have (on average 1.2390955740859526) internal successors, (23181), 18708 states have internal predecessors, (23181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18709 states to 18709 states and 23181 transitions. [2022-12-14 10:49:11,083 INFO L78 Accepts]: Start accepts. Automaton has 18709 states and 23181 transitions. Word has length 292 [2022-12-14 10:49:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:49:11,083 INFO L495 AbstractCegarLoop]: Abstraction has 18709 states and 23181 transitions. [2022-12-14 10:49:11,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 18709 states and 23181 transitions. [2022-12-14 10:49:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-12-14 10:49:11,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:49:11,094 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:49:11,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:49:11,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:49:11,296 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:49:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:49:11,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1575740423, now seen corresponding path program 1 times [2022-12-14 10:49:11,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:49:11,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817980056] [2022-12-14 10:49:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:11,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:49:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 161 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 10:49:11,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:49:11,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817980056] [2022-12-14 10:49:11,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817980056] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:49:11,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356340937] [2022-12-14 10:49:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:11,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:49:11,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:49:11,668 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:49:11,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:49:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:11,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:49:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:49:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:49:11,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:49:11,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356340937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:11,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:49:11,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 10:49:11,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556572370] [2022-12-14 10:49:11,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:11,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:49:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:11,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:49:11,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:11,910 INFO L87 Difference]: Start difference. First operand 18709 states and 23181 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:12,461 INFO L93 Difference]: Finished difference Result 38722 states and 48568 transitions. [2022-12-14 10:49:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:49:12,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 299 [2022-12-14 10:49:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:12,477 INFO L225 Difference]: With dead ends: 38722 [2022-12-14 10:49:12,477 INFO L226 Difference]: Without dead ends: 20720 [2022-12-14 10:49:12,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:12,486 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:12,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 191 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:49:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20720 states. [2022-12-14 10:49:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20720 to 20719. [2022-12-14 10:49:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20719 states, 20718 states have (on average 1.253064967660971) internal successors, (25961), 20718 states have internal predecessors, (25961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20719 states to 20719 states and 25961 transitions. [2022-12-14 10:49:12,716 INFO L78 Accepts]: Start accepts. Automaton has 20719 states and 25961 transitions. Word has length 299 [2022-12-14 10:49:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:49:12,716 INFO L495 AbstractCegarLoop]: Abstraction has 20719 states and 25961 transitions. [2022-12-14 10:49:12,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 20719 states and 25961 transitions. [2022-12-14 10:49:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-12-14 10:49:12,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:49:12,728 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-12-14 10:49:12,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:49:12,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 10:49:12,931 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:49:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:49:12,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1457178122, now seen corresponding path program 1 times [2022-12-14 10:49:12,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:49:12,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408535052] [2022-12-14 10:49:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:12,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:49:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 10:49:13,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:49:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408535052] [2022-12-14 10:49:13,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408535052] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:13,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:49:13,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:49:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439396121] [2022-12-14 10:49:13,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:13,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:49:13,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:49:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:49:13,141 INFO L87 Difference]: Start difference. First operand 20719 states and 25961 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:13,542 INFO L93 Difference]: Finished difference Result 56185 states and 70223 transitions. [2022-12-14 10:49:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:49:13,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 354 [2022-12-14 10:49:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:13,573 INFO L225 Difference]: With dead ends: 56185 [2022-12-14 10:49:13,573 INFO L226 Difference]: Without dead ends: 36306 [2022-12-14 10:49:13,586 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 10:49:13,586 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 217 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:13,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 605 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:49:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36306 states. [2022-12-14 10:49:13,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36306 to 35019. [2022-12-14 10:49:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35019 states, 35018 states have (on average 1.223684962019533) internal successors, (42851), 35018 states have internal predecessors, (42851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35019 states to 35019 states and 42851 transitions. [2022-12-14 10:49:13,968 INFO L78 Accepts]: Start accepts. Automaton has 35019 states and 42851 transitions. Word has length 354 [2022-12-14 10:49:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:49:13,968 INFO L495 AbstractCegarLoop]: Abstraction has 35019 states and 42851 transitions. [2022-12-14 10:49:13,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 35019 states and 42851 transitions. [2022-12-14 10:49:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-12-14 10:49:13,995 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:49:13,995 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:13,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 10:49:13,995 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:49:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:49:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1901556070, now seen corresponding path program 1 times [2022-12-14 10:49:13,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:49:13,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607698652] [2022-12-14 10:49:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:13,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:49:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 260 proven. 3 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-12-14 10:49:14,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:49:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607698652] [2022-12-14 10:49:14,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607698652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:49:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590453172] [2022-12-14 10:49:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:14,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:49:14,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:49:14,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:49:14,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:49:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:49:14,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:49:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 477 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:49:15,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:49:15,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590453172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:15,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:49:15,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-12-14 10:49:15,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686983239] [2022-12-14 10:49:15,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:15,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:49:15,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:49:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:49:15,031 INFO L87 Difference]: Start difference. First operand 35019 states and 42851 transitions. Second operand has 5 states, 5 states have (on average 79.2) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:16,154 INFO L93 Difference]: Finished difference Result 124827 states and 152369 transitions. [2022-12-14 10:49:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:49:16,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 79.2) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 404 [2022-12-14 10:49:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:16,241 INFO L225 Difference]: With dead ends: 124827 [2022-12-14 10:49:16,241 INFO L226 Difference]: Without dead ends: 90648 [2022-12-14 10:49:16,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:49:16,265 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 767 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:16,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 324 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:49:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90648 states. [2022-12-14 10:49:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90648 to 80350. [2022-12-14 10:49:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80350 states, 80349 states have (on average 1.2281422295237028) internal successors, (98680), 80349 states have internal predecessors, (98680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80350 states to 80350 states and 98680 transitions. [2022-12-14 10:49:17,364 INFO L78 Accepts]: Start accepts. Automaton has 80350 states and 98680 transitions. Word has length 404 [2022-12-14 10:49:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:49:17,365 INFO L495 AbstractCegarLoop]: Abstraction has 80350 states and 98680 transitions. [2022-12-14 10:49:17,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.2) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:17,365 INFO L276 IsEmpty]: Start isEmpty. Operand 80350 states and 98680 transitions. [2022-12-14 10:49:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-12-14 10:49:17,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:49:17,421 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:49:17,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:49:17,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 10:49:17,623 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:49:17,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:49:17,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1217455963, now seen corresponding path program 1 times [2022-12-14 10:49:17,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:49:17,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695006534] [2022-12-14 10:49:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:17,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:49:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 304 proven. 12 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 10:49:18,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:49:18,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695006534] [2022-12-14 10:49:18,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695006534] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:49:18,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776936334] [2022-12-14 10:49:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:18,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:49:18,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:49:18,139 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:49:18,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:49:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:18,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:49:18,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:49:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 10:49:18,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:49:18,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776936334] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:18,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:49:18,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 10:49:18,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676678704] [2022-12-14 10:49:18,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:18,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:49:18,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:18,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:49:18,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:18,466 INFO L87 Difference]: Start difference. First operand 80350 states and 98680 transitions. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:19,533 INFO L93 Difference]: Finished difference Result 209624 states and 255952 transitions. [2022-12-14 10:49:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:49:19,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 410 [2022-12-14 10:49:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:19,671 INFO L225 Difference]: With dead ends: 209624 [2022-12-14 10:49:19,671 INFO L226 Difference]: Without dead ends: 130114 [2022-12-14 10:49:19,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:19,716 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 120 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:19,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 549 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:49:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130114 states. [2022-12-14 10:49:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130114 to 127540. [2022-12-14 10:49:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127540 states, 127539 states have (on average 1.2004876939602789) internal successors, (153109), 127539 states have internal predecessors, (153109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127540 states to 127540 states and 153109 transitions. [2022-12-14 10:49:21,485 INFO L78 Accepts]: Start accepts. Automaton has 127540 states and 153109 transitions. Word has length 410 [2022-12-14 10:49:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:49:21,485 INFO L495 AbstractCegarLoop]: Abstraction has 127540 states and 153109 transitions. [2022-12-14 10:49:21,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 127540 states and 153109 transitions. [2022-12-14 10:49:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-12-14 10:49:21,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:49:21,585 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 10:49:21,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:49:21,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 10:49:21,787 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:49:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:49:21,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1287226883, now seen corresponding path program 1 times [2022-12-14 10:49:21,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:49:21,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463132275] [2022-12-14 10:49:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:49:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2022-12-14 10:49:22,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:49:22,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463132275] [2022-12-14 10:49:22,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463132275] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:22,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:49:22,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:49:22,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832719459] [2022-12-14 10:49:22,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:22,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:49:22,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:22,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:49:22,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:49:22,327 INFO L87 Difference]: Start difference. First operand 127540 states and 153109 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:25,477 INFO L93 Difference]: Finished difference Result 441431 states and 527538 transitions. [2022-12-14 10:49:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:49:25,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2022-12-14 10:49:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:25,815 INFO L225 Difference]: With dead ends: 441431 [2022-12-14 10:49:25,815 INFO L226 Difference]: Without dead ends: 314731 [2022-12-14 10:49:25,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:49:25,886 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 633 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:25,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 15 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:49:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314731 states. [2022-12-14 10:49:29,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314731 to 313583. [2022-12-14 10:49:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313583 states, 313582 states have (on average 1.1898195687252457) internal successors, (373106), 313582 states have internal predecessors, (373106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313583 states to 313583 states and 373106 transitions. [2022-12-14 10:49:30,558 INFO L78 Accepts]: Start accepts. Automaton has 313583 states and 373106 transitions. Word has length 455 [2022-12-14 10:49:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:49:30,558 INFO L495 AbstractCegarLoop]: Abstraction has 313583 states and 373106 transitions. [2022-12-14 10:49:30,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:30,559 INFO L276 IsEmpty]: Start isEmpty. Operand 313583 states and 373106 transitions. [2022-12-14 10:49:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-12-14 10:49:30,768 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:49:30,768 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 10:49:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 10:49:30,769 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:49:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:49:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2074926807, now seen corresponding path program 1 times [2022-12-14 10:49:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:49:30,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432790183] [2022-12-14 10:49:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:49:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2022-12-14 10:49:31,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:49:31,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432790183] [2022-12-14 10:49:31,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432790183] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:31,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:49:31,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:49:31,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982582693] [2022-12-14 10:49:31,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:31,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:49:31,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:31,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:49:31,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:49:31,270 INFO L87 Difference]: Start difference. First operand 313583 states and 373106 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:36,066 INFO L93 Difference]: Finished difference Result 879007 states and 1047283 transitions. [2022-12-14 10:49:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:49:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 473 [2022-12-14 10:49:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:36,832 INFO L225 Difference]: With dead ends: 879007 [2022-12-14 10:49:36,832 INFO L226 Difference]: Without dead ends: 566264 [2022-12-14 10:49:36,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:49:36,942 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 396 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:36,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 267 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:49:37,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566264 states. [2022-12-14 10:49:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566264 to 554252. [2022-12-14 10:49:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554252 states, 554251 states have (on average 1.1936180539142014) internal successors, (661564), 554251 states have internal predecessors, (661564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554252 states to 554252 states and 661564 transitions. [2022-12-14 10:49:45,193 INFO L78 Accepts]: Start accepts. Automaton has 554252 states and 661564 transitions. Word has length 473 [2022-12-14 10:49:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:49:45,193 INFO L495 AbstractCegarLoop]: Abstraction has 554252 states and 661564 transitions. [2022-12-14 10:49:45,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 554252 states and 661564 transitions. [2022-12-14 10:49:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-12-14 10:49:45,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:49:45,399 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:49:45,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 10:49:45,399 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:49:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:49:45,399 INFO L85 PathProgramCache]: Analyzing trace with hash 216083233, now seen corresponding path program 1 times [2022-12-14 10:49:45,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:49:45,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607015377] [2022-12-14 10:49:45,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:45,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:49:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 416 proven. 12 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2022-12-14 10:49:46,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:49:46,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607015377] [2022-12-14 10:49:46,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607015377] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:49:46,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265226655] [2022-12-14 10:49:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:49:46,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:49:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:49:46,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:49:46,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:49:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:49:46,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:49:46,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:49:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 595 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-12-14 10:49:46,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:49:46,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265226655] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:49:46,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:49:46,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 10:49:46,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401732940] [2022-12-14 10:49:46,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:49:46,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:49:46,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:49:46,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:49:46,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:46,402 INFO L87 Difference]: Start difference. First operand 554252 states and 661564 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:49:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:49:51,120 INFO L93 Difference]: Finished difference Result 1136552 states and 1357823 transitions. [2022-12-14 10:49:51,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:49:51,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 483 [2022-12-14 10:49:51,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:49:51,857 INFO L225 Difference]: With dead ends: 1136552 [2022-12-14 10:49:51,857 INFO L226 Difference]: Without dead ends: 583140 [2022-12-14 10:49:52,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:49:52,036 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 109 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:49:52,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 113 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:49:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583140 states. [2022-12-14 10:49:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583140 to 573414. [2022-12-14 10:49:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573414 states, 573413 states have (on average 1.1946119114843925) internal successors, (685006), 573413 states have internal predecessors, (685006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:50:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573414 states to 573414 states and 685006 transitions. [2022-12-14 10:50:00,884 INFO L78 Accepts]: Start accepts. Automaton has 573414 states and 685006 transitions. Word has length 483 [2022-12-14 10:50:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:50:00,884 INFO L495 AbstractCegarLoop]: Abstraction has 573414 states and 685006 transitions. [2022-12-14 10:50:00,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:50:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 573414 states and 685006 transitions. [2022-12-14 10:50:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-12-14 10:50:01,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:50:01,090 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:50:01,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:50:01,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:50:01,292 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:50:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:50:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1490270867, now seen corresponding path program 1 times [2022-12-14 10:50:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:50:01,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380640400] [2022-12-14 10:50:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:50:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:50:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:50:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 394 proven. 12 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-12-14 10:50:01,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:50:01,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380640400] [2022-12-14 10:50:01,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380640400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:50:01,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57641302] [2022-12-14 10:50:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:50:01,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:50:01,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:50:02,000 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:50:02,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a980b63-84d1-487c-8e27-a4183d7c137d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:50:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:50:02,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:50:02,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:50:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 429 proven. 184 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-12-14 10:50:02,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:50:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 429 proven. 184 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-12-14 10:50:02,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57641302] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:50:02,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632934339] [2022-12-14 10:50:02,708 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 10:50:02,708 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:50:02,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:50:02,708 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:50:02,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs