./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7 --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 be1fcaa299b4a26d5c3c0d4f857b13329cbb7ec0505911e54bd9d27d2647b4d4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:20:08,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:20:08,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:20:08,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:20:08,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:20:08,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:20:08,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:20:08,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:20:08,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:20:08,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:20:08,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:20:08,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:20:08,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:20:08,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:20:08,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:20:08,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:20:08,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:20:08,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:20:08,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:20:08,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:20:08,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:20:08,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:20:08,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:20:08,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:20:08,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:20:08,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:20:08,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:20:08,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:20:08,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:20:08,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:20:08,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:20:08,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:20:08,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:20:08,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:20:09,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:20:09,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:20:09,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:20:09,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:20:09,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:20:09,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:20:09,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:20:09,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:20:09,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:20:09,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:20:09,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:20:09,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:20:09,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:20:09,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:20:09,057 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:20:09,057 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:20:09,058 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:20:09,058 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:20:09,059 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:20:09,059 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:20:09,059 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:20:09,059 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:20:09,060 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:20:09,060 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:20:09,060 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:20:09,060 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:20:09,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:20:09,061 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:20:09,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:20:09,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:20:09,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:20:09,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:20:09,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:20:09,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:20:09,064 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:20:09,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:20:09,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:20:09,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:20:09,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:20:09,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:20:09,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:20:09,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:20:09,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:20:09,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:20:09,066 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:20:09,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:20:09,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:20:09,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:20:09,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:20:09,067 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1fcaa299b4a26d5c3c0d4f857b13329cbb7ec0505911e54bd9d27d2647b4d4 [2021-11-25 20:20:09,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:20:09,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:20:09,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:20:09,352 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:20:09,352 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:20:09,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-25 20:20:09,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/data/18b986414/cb9d11e58afb461d92b1f224b6e06e92/FLAG761dd7745 [2021-11-25 20:20:10,236 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:20:10,237 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-25 20:20:10,273 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/data/18b986414/cb9d11e58afb461d92b1f224b6e06e92/FLAG761dd7745 [2021-11-25 20:20:10,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/data/18b986414/cb9d11e58afb461d92b1f224b6e06e92 [2021-11-25 20:20:10,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:20:10,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:20:10,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:20:10,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:20:10,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:20:10,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe8d373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10, skipping insertion in model container [2021-11-25 20:20:10,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:20:10,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:20:10,804 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7172,7185] [2021-11-25 20:20:10,827 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[10914,10927] [2021-11-25 20:20:10,865 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[17944,17957] [2021-11-25 20:20:10,896 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24017,24030] [2021-11-25 20:20:10,980 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42645,42658] [2021-11-25 20:20:11,053 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[64626,64639] [2021-11-25 20:20:11,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:20:11,289 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:20:11,335 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7172,7185] [2021-11-25 20:20:11,385 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[10914,10927] [2021-11-25 20:20:11,401 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[17944,17957] [2021-11-25 20:20:11,414 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24017,24030] [2021-11-25 20:20:11,451 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42645,42658] [2021-11-25 20:20:11,495 WARN L230 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_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[64626,64639] [2021-11-25 20:20:11,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:20:11,620 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:20:11,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11 WrapperNode [2021-11-25 20:20:11,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:20:11,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:20:11,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:20:11,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:20:11,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,817 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5288 [2021-11-25 20:20:11,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:20:11,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:20:11,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:20:11,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:20:11,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:20:11,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:20:11,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:20:11,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:20:11,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (1/1) ... [2021-11-25 20:20:11,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:20:11,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:12,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:20:12,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:20:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:20:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:20:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:20:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:20:12,395 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:20:12,396 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:20:14,638 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:20:15,002 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:20:15,002 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:20:15,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:15 BoogieIcfgContainer [2021-11-25 20:20:15,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:20:15,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:20:15,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:20:15,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:20:15,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:20:10" (1/3) ... [2021-11-25 20:20:15,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740344f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:20:15, skipping insertion in model container [2021-11-25 20:20:15,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:11" (2/3) ... [2021-11-25 20:20:15,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740344f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:20:15, skipping insertion in model container [2021-11-25 20:20:15,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:15" (3/3) ... [2021-11-25 20:20:15,017 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-25 20:20:15,027 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:20:15,027 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-25 20:20:15,077 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:20:15,083 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:20:15,084 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-25 20:20:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 1053 states, 1046 states have (on average 1.8355640535372848) internal successors, (1920), 1052 states have internal predecessors, (1920), 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) [2021-11-25 20:20:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:20:15,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:15,151 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:15,151 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:15,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2020000843, now seen corresponding path program 1 times [2021-11-25 20:20:15,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:15,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957756990] [2021-11-25 20:20:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:15,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:15,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:15,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957756990] [2021-11-25 20:20:15,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957756990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:15,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:15,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:20:15,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320494452] [2021-11-25 20:20:15,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:15,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:20:15,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:20:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:15,645 INFO L87 Difference]: Start difference. First operand has 1053 states, 1046 states have (on average 1.8355640535372848) internal successors, (1920), 1052 states have internal predecessors, (1920), 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 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-25 20:20:17,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:17,120 INFO L93 Difference]: Finished difference Result 1879 states and 3332 transitions. [2021-11-25 20:20:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:20:17,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-11-25 20:20:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:17,150 INFO L225 Difference]: With dead ends: 1879 [2021-11-25 20:20:17,151 INFO L226 Difference]: Without dead ends: 1220 [2021-11-25 20:20:17,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:20:17,165 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 5896 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5896 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:17,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5896 Valid, 1246 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 20:20:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-11-25 20:20:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1208. [2021-11-25 20:20:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1202 states have (on average 1.2961730449251248) internal successors, (1558), 1207 states have internal predecessors, (1558), 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) [2021-11-25 20:20:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1558 transitions. [2021-11-25 20:20:17,298 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1558 transitions. Word has length 50 [2021-11-25 20:20:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:17,298 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1558 transitions. [2021-11-25 20:20:17,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-25 20:20:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1558 transitions. [2021-11-25 20:20:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:20:17,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:17,303 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:17,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:20:17,304 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash -371948326, now seen corresponding path program 1 times [2021-11-25 20:20:17,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:17,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64430189] [2021-11-25 20:20:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:17,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:17,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:17,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64430189] [2021-11-25 20:20:17,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64430189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:17,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:17,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:20:17,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727073746] [2021-11-25 20:20:17,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:17,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:20:17,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:17,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:20:17,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:17,488 INFO L87 Difference]: Start difference. First operand 1208 states and 1558 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-25 20:20:18,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:18,506 INFO L93 Difference]: Finished difference Result 2197 states and 2879 transitions. [2021-11-25 20:20:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:20:18,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-11-25 20:20:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:18,515 INFO L225 Difference]: With dead ends: 2197 [2021-11-25 20:20:18,516 INFO L226 Difference]: Without dead ends: 1474 [2021-11-25 20:20:18,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:20:18,519 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 3680 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3680 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:18,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3680 Valid, 675 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:20:18,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-11-25 20:20:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1464. [2021-11-25 20:20:18,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1458 states have (on average 1.3072702331961592) internal successors, (1906), 1463 states have internal predecessors, (1906), 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) [2021-11-25 20:20:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1906 transitions. [2021-11-25 20:20:18,591 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1906 transitions. Word has length 50 [2021-11-25 20:20:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 1906 transitions. [2021-11-25 20:20:18,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-25 20:20:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1906 transitions. [2021-11-25 20:20:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:20:18,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:18,596 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:18,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:20:18,596 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1656171021, now seen corresponding path program 1 times [2021-11-25 20:20:18,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:18,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121530764] [2021-11-25 20:20:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:18,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:18,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121530764] [2021-11-25 20:20:18,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121530764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:18,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:18,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:20:18,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19965609] [2021-11-25 20:20:18,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:18,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:20:18,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:20:18,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:18,716 INFO L87 Difference]: Start difference. First operand 1464 states and 1906 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-25 20:20:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:19,591 INFO L93 Difference]: Finished difference Result 2827 states and 3713 transitions. [2021-11-25 20:20:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:20:19,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2021-11-25 20:20:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:19,604 INFO L225 Difference]: With dead ends: 2827 [2021-11-25 20:20:19,604 INFO L226 Difference]: Without dead ends: 2099 [2021-11-25 20:20:19,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:20:19,610 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 3308 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3308 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:19,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3308 Valid, 646 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:20:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-11-25 20:20:19,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2093. [2021-11-25 20:20:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.2980354575946333) internal successors, (2709), 2092 states have internal predecessors, (2709), 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) [2021-11-25 20:20:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2709 transitions. [2021-11-25 20:20:19,775 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2709 transitions. Word has length 50 [2021-11-25 20:20:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:19,775 INFO L470 AbstractCegarLoop]: Abstraction has 2093 states and 2709 transitions. [2021-11-25 20:20:19,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-25 20:20:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2709 transitions. [2021-11-25 20:20:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:20:19,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:19,779 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:19,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:20:19,780 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:19,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:19,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1156025879, now seen corresponding path program 1 times [2021-11-25 20:20:19,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:19,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764841070] [2021-11-25 20:20:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:19,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:19,922 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:19,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764841070] [2021-11-25 20:20:19,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764841070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:19,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:19,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:20:19,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12125263] [2021-11-25 20:20:19,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:19,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:20:19,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:20:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:19,926 INFO L87 Difference]: Start difference. First operand 2093 states and 2709 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 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) [2021-11-25 20:20:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:21,758 INFO L93 Difference]: Finished difference Result 3181 states and 4160 transitions. [2021-11-25 20:20:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:20:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 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 51 [2021-11-25 20:20:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:21,777 INFO L225 Difference]: With dead ends: 3181 [2021-11-25 20:20:21,777 INFO L226 Difference]: Without dead ends: 3176 [2021-11-25 20:20:21,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:20:21,780 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 2309 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2309 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:21,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2309 Valid, 1988 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 20:20:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-11-25 20:20:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2093. [2021-11-25 20:20:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.2975563009103976) internal successors, (2708), 2092 states have internal predecessors, (2708), 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) [2021-11-25 20:20:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2708 transitions. [2021-11-25 20:20:21,950 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2708 transitions. Word has length 51 [2021-11-25 20:20:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:21,951 INFO L470 AbstractCegarLoop]: Abstraction has 2093 states and 2708 transitions. [2021-11-25 20:20:21,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 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) [2021-11-25 20:20:21,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2708 transitions. [2021-11-25 20:20:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:20:21,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:21,955 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:21,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:20:21,956 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash 544097692, now seen corresponding path program 1 times [2021-11-25 20:20:21,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:21,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377149783] [2021-11-25 20:20:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:21,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:22,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:22,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377149783] [2021-11-25 20:20:22,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377149783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:22,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:22,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:20:22,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214191922] [2021-11-25 20:20:22,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:22,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:20:22,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:22,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:20:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:22,089 INFO L87 Difference]: Start difference. First operand 2093 states and 2708 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 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) [2021-11-25 20:20:24,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:24,231 INFO L93 Difference]: Finished difference Result 3833 states and 5088 transitions. [2021-11-25 20:20:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:20:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 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 51 [2021-11-25 20:20:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:24,250 INFO L225 Difference]: With dead ends: 3833 [2021-11-25 20:20:24,251 INFO L226 Difference]: Without dead ends: 3510 [2021-11-25 20:20:24,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:20:24,253 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 2785 mSDsluCounter, 2183 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2785 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:24,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2785 Valid, 2737 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-25 20:20:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-11-25 20:20:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2093. [2021-11-25 20:20:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.297077144226162) internal successors, (2707), 2092 states have internal predecessors, (2707), 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) [2021-11-25 20:20:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2707 transitions. [2021-11-25 20:20:24,464 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2707 transitions. Word has length 51 [2021-11-25 20:20:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:24,466 INFO L470 AbstractCegarLoop]: Abstraction has 2093 states and 2707 transitions. [2021-11-25 20:20:24,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 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) [2021-11-25 20:20:24,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2707 transitions. [2021-11-25 20:20:24,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:20:24,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:24,472 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:24,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:20:24,472 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1134807775, now seen corresponding path program 1 times [2021-11-25 20:20:24,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:24,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850864614] [2021-11-25 20:20:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:24,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:24,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:24,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850864614] [2021-11-25 20:20:24,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850864614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:24,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:24,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:20:24,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363952776] [2021-11-25 20:20:24,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:24,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:20:24,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:20:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:20:24,580 INFO L87 Difference]: Start difference. First operand 2093 states and 2707 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-11-25 20:20:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:25,985 INFO L93 Difference]: Finished difference Result 3455 states and 4567 transitions. [2021-11-25 20:20:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:20:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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 51 [2021-11-25 20:20:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:26,002 INFO L225 Difference]: With dead ends: 3455 [2021-11-25 20:20:26,002 INFO L226 Difference]: Without dead ends: 3008 [2021-11-25 20:20:26,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:20:26,010 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 3443 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:26,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3443 Valid, 1426 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 20:20:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-25 20:20:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2093. [2021-11-25 20:20:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.2965979875419262) internal successors, (2706), 2092 states have internal predecessors, (2706), 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) [2021-11-25 20:20:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2706 transitions. [2021-11-25 20:20:26,208 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2706 transitions. Word has length 51 [2021-11-25 20:20:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:26,209 INFO L470 AbstractCegarLoop]: Abstraction has 2093 states and 2706 transitions. [2021-11-25 20:20:26,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-11-25 20:20:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2706 transitions. [2021-11-25 20:20:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:20:26,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:26,213 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:26,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:20:26,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1876349593, now seen corresponding path program 1 times [2021-11-25 20:20:26,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358179107] [2021-11-25 20:20:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:26,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:26,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:26,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358179107] [2021-11-25 20:20:26,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358179107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:26,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:26,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:26,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659039569] [2021-11-25 20:20:26,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:26,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:26,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:26,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:26,299 INFO L87 Difference]: Start difference. First operand 2093 states and 2706 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 20:20:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:26,566 INFO L93 Difference]: Finished difference Result 2855 states and 3765 transitions. [2021-11-25 20:20:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:26,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-25 20:20:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:26,577 INFO L225 Difference]: With dead ends: 2855 [2021-11-25 20:20:26,577 INFO L226 Difference]: Without dead ends: 1802 [2021-11-25 20:20:26,579 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:20:26,580 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 522 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:26,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 1122 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:20:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-11-25 20:20:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2021-11-25 20:20:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1794 states have (on average 1.2709030100334449) internal successors, (2280), 1799 states have internal predecessors, (2280), 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) [2021-11-25 20:20:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2280 transitions. [2021-11-25 20:20:26,799 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2280 transitions. Word has length 52 [2021-11-25 20:20:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:26,799 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2280 transitions. [2021-11-25 20:20:26,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 20:20:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2280 transitions. [2021-11-25 20:20:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:20:26,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:26,803 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:26,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:20:26,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:26,805 INFO L85 PathProgramCache]: Analyzing trace with hash -128279793, now seen corresponding path program 1 times [2021-11-25 20:20:26,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416467097] [2021-11-25 20:20:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:26,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:26,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:26,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416467097] [2021-11-25 20:20:26,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416467097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:26,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:26,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:26,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870629782] [2021-11-25 20:20:26,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:26,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:26,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:26,890 INFO L87 Difference]: Start difference. First operand 1800 states and 2280 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 20:20:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:27,198 INFO L93 Difference]: Finished difference Result 2757 states and 3658 transitions. [2021-11-25 20:20:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:27,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-25 20:20:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:27,211 INFO L225 Difference]: With dead ends: 2757 [2021-11-25 20:20:27,211 INFO L226 Difference]: Without dead ends: 2057 [2021-11-25 20:20:27,213 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:20:27,213 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 377 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:27,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1207 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:20:27,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-11-25 20:20:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2055. [2021-11-25 20:20:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2049 states have (on average 1.3025866276232307) internal successors, (2669), 2054 states have internal predecessors, (2669), 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) [2021-11-25 20:20:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 2669 transitions. [2021-11-25 20:20:27,455 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 2669 transitions. Word has length 52 [2021-11-25 20:20:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:27,456 INFO L470 AbstractCegarLoop]: Abstraction has 2055 states and 2669 transitions. [2021-11-25 20:20:27,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 20:20:27,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 2669 transitions. [2021-11-25 20:20:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:20:27,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:27,459 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:27,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:20:27,460 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash -678266137, now seen corresponding path program 1 times [2021-11-25 20:20:27,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:27,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139456689] [2021-11-25 20:20:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:27,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:27,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:27,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139456689] [2021-11-25 20:20:27,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139456689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:27,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:27,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:27,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490746025] [2021-11-25 20:20:27,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:27,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:27,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:27,510 INFO L87 Difference]: Start difference. First operand 2055 states and 2669 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 20:20:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:27,903 INFO L93 Difference]: Finished difference Result 3729 states and 5048 transitions. [2021-11-25 20:20:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-25 20:20:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:27,917 INFO L225 Difference]: With dead ends: 3729 [2021-11-25 20:20:27,917 INFO L226 Difference]: Without dead ends: 2601 [2021-11-25 20:20:27,920 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:20:27,920 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 349 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:27,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 1228 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:20:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-11-25 20:20:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2599. [2021-11-25 20:20:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2593 states have (on average 1.321635171615889) internal successors, (3427), 2598 states have internal predecessors, (3427), 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) [2021-11-25 20:20:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3427 transitions. [2021-11-25 20:20:28,280 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3427 transitions. Word has length 52 [2021-11-25 20:20:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:28,280 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 3427 transitions. [2021-11-25 20:20:28,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 20:20:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3427 transitions. [2021-11-25 20:20:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:20:28,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:28,284 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:28,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:20:28,284 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:28,285 INFO L85 PathProgramCache]: Analyzing trace with hash 396589116, now seen corresponding path program 1 times [2021-11-25 20:20:28,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:28,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830886393] [2021-11-25 20:20:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:28,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:28,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:28,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830886393] [2021-11-25 20:20:28,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830886393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:28,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:28,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:28,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316536256] [2021-11-25 20:20:28,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:28,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:28,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:28,326 INFO L87 Difference]: Start difference. First operand 2599 states and 3427 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-25 20:20:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:28,749 INFO L93 Difference]: Finished difference Result 4611 states and 6191 transitions. [2021-11-25 20:20:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2021-11-25 20:20:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:28,764 INFO L225 Difference]: With dead ends: 4611 [2021-11-25 20:20:28,764 INFO L226 Difference]: Without dead ends: 2525 [2021-11-25 20:20:28,768 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:20:28,769 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 557 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:28,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 801 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:20:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-11-25 20:20:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2213. [2021-11-25 20:20:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2208 states have (on average 1.3269927536231885) internal successors, (2930), 2212 states have internal predecessors, (2930), 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) [2021-11-25 20:20:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 2930 transitions. [2021-11-25 20:20:29,088 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 2930 transitions. Word has length 53 [2021-11-25 20:20:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:29,089 INFO L470 AbstractCegarLoop]: Abstraction has 2213 states and 2930 transitions. [2021-11-25 20:20:29,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-25 20:20:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 2930 transitions. [2021-11-25 20:20:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:20:29,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:29,091 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:29,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:20:29,092 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:29,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1097574629, now seen corresponding path program 1 times [2021-11-25 20:20:29,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:29,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809526695] [2021-11-25 20:20:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:29,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:29,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:29,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809526695] [2021-11-25 20:20:29,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809526695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:29,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:29,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:29,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190572823] [2021-11-25 20:20:29,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:29,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:29,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:29,131 INFO L87 Difference]: Start difference. First operand 2213 states and 2930 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-25 20:20:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:29,508 INFO L93 Difference]: Finished difference Result 4102 states and 5512 transitions. [2021-11-25 20:20:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2021-11-25 20:20:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:29,519 INFO L225 Difference]: With dead ends: 4102 [2021-11-25 20:20:29,519 INFO L226 Difference]: Without dead ends: 2233 [2021-11-25 20:20:29,523 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:20:29,524 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 445 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:29,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 595 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:20:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-11-25 20:20:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1971. [2021-11-25 20:20:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1967 states have (on average 1.335027961362481) internal successors, (2626), 1970 states have internal predecessors, (2626), 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) [2021-11-25 20:20:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2626 transitions. [2021-11-25 20:20:29,864 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2626 transitions. Word has length 53 [2021-11-25 20:20:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:29,864 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 2626 transitions. [2021-11-25 20:20:29,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-25 20:20:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2626 transitions. [2021-11-25 20:20:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:20:29,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:29,866 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:29,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:20:29,867 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1858325642, now seen corresponding path program 1 times [2021-11-25 20:20:29,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:29,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581431329] [2021-11-25 20:20:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:29,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:30,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:30,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581431329] [2021-11-25 20:20:30,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581431329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:30,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:30,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 20:20:30,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975828854] [2021-11-25 20:20:30,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:30,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:20:30,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:20:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:20:30,272 INFO L87 Difference]: Start difference. First operand 1971 states and 2626 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 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) [2021-11-25 20:20:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:32,108 INFO L93 Difference]: Finished difference Result 3713 states and 4935 transitions. [2021-11-25 20:20:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:20:32,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 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 54 [2021-11-25 20:20:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:32,134 INFO L225 Difference]: With dead ends: 3713 [2021-11-25 20:20:32,135 INFO L226 Difference]: Without dead ends: 3491 [2021-11-25 20:20:32,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:20:32,144 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 2897 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2897 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:32,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2897 Valid, 3584 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:20:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2021-11-25 20:20:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 1959. [2021-11-25 20:20:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1956 states have (on average 1.3353783231083844) internal successors, (2612), 1958 states have internal predecessors, (2612), 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) [2021-11-25 20:20:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2612 transitions. [2021-11-25 20:20:32,477 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2612 transitions. Word has length 54 [2021-11-25 20:20:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:32,477 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 2612 transitions. [2021-11-25 20:20:32,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 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) [2021-11-25 20:20:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2612 transitions. [2021-11-25 20:20:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:20:32,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:32,480 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:32,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:20:32,480 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1760291884, now seen corresponding path program 1 times [2021-11-25 20:20:32,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:32,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739333309] [2021-11-25 20:20:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:32,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:32,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:32,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739333309] [2021-11-25 20:20:32,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739333309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:32,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:32,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 20:20:32,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653873681] [2021-11-25 20:20:32,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:32,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:20:32,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:32,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:20:32,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:20:32,785 INFO L87 Difference]: Start difference. First operand 1959 states and 2612 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 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) [2021-11-25 20:20:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:34,360 INFO L93 Difference]: Finished difference Result 4069 states and 5389 transitions. [2021-11-25 20:20:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:20:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 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 54 [2021-11-25 20:20:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:34,370 INFO L225 Difference]: With dead ends: 4069 [2021-11-25 20:20:34,370 INFO L226 Difference]: Without dead ends: 3831 [2021-11-25 20:20:34,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2021-11-25 20:20:34,373 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 3263 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3263 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:34,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3263 Valid, 2091 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:20:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2021-11-25 20:20:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 1931. [2021-11-25 20:20:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1929 states have (on average 1.3364437532400206) internal successors, (2578), 1930 states have internal predecessors, (2578), 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) [2021-11-25 20:20:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 2578 transitions. [2021-11-25 20:20:34,757 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 2578 transitions. Word has length 54 [2021-11-25 20:20:34,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:34,757 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 2578 transitions. [2021-11-25 20:20:34,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 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) [2021-11-25 20:20:34,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 2578 transitions. [2021-11-25 20:20:34,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:20:34,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:34,760 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:34,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:20:34,760 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash 915713314, now seen corresponding path program 1 times [2021-11-25 20:20:34,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:34,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087015516] [2021-11-25 20:20:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:34,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:35,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:35,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087015516] [2021-11-25 20:20:35,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087015516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:35,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:35,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 20:20:35,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742115494] [2021-11-25 20:20:35,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:35,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:20:35,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:35,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:20:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:20:35,067 INFO L87 Difference]: Start difference. First operand 1931 states and 2578 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 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) [2021-11-25 20:20:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:37,155 INFO L93 Difference]: Finished difference Result 4292 states and 5685 transitions. [2021-11-25 20:20:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 20:20:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 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 54 [2021-11-25 20:20:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:37,162 INFO L225 Difference]: With dead ends: 4292 [2021-11-25 20:20:37,162 INFO L226 Difference]: Without dead ends: 4061 [2021-11-25 20:20:37,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:20:37,165 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 2148 mSDsluCounter, 3286 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2148 SdHoareTripleChecker+Valid, 3968 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:37,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2148 Valid, 3968 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:20:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-11-25 20:20:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 1910. [2021-11-25 20:20:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 1.3368255631220534) internal successors, (2552), 1909 states have internal predecessors, (2552), 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) [2021-11-25 20:20:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2552 transitions. [2021-11-25 20:20:37,483 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2552 transitions. Word has length 54 [2021-11-25 20:20:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:37,484 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 2552 transitions. [2021-11-25 20:20:37,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 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) [2021-11-25 20:20:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2552 transitions. [2021-11-25 20:20:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 20:20:37,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:37,487 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:37,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:20:37,488 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash 711019173, now seen corresponding path program 1 times [2021-11-25 20:20:37,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:37,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53878678] [2021-11-25 20:20:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:37,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:37,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:37,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53878678] [2021-11-25 20:20:37,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53878678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:37,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:37,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:37,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647145280] [2021-11-25 20:20:37,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:37,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:37,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:37,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:37,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:37,540 INFO L87 Difference]: Start difference. First operand 1910 states and 2552 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2021-11-25 20:20:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:38,039 INFO L93 Difference]: Finished difference Result 4345 states and 5958 transitions. [2021-11-25 20:20:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2021-11-25 20:20:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:38,047 INFO L225 Difference]: With dead ends: 4345 [2021-11-25 20:20:38,047 INFO L226 Difference]: Without dead ends: 2871 [2021-11-25 20:20:38,049 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:20:38,050 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 189 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:38,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 645 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:20:38,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-11-25 20:20:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2563. [2021-11-25 20:20:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 1.336455893832943) internal successors, (3424), 2562 states have internal predecessors, (3424), 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) [2021-11-25 20:20:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 3424 transitions. [2021-11-25 20:20:38,658 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 3424 transitions. Word has length 55 [2021-11-25 20:20:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:38,659 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 3424 transitions. [2021-11-25 20:20:38,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2021-11-25 20:20:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 3424 transitions. [2021-11-25 20:20:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 20:20:38,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:38,661 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:38,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:20:38,661 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash 56664476, now seen corresponding path program 1 times [2021-11-25 20:20:38,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:38,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887712358] [2021-11-25 20:20:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:38,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:38,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:38,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887712358] [2021-11-25 20:20:38,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887712358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:38,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:38,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:20:38,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839743691] [2021-11-25 20:20:38,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:38,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:20:38,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:38,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:20:38,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:38,738 INFO L87 Difference]: Start difference. First operand 2563 states and 3424 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-25 20:20:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:39,207 INFO L93 Difference]: Finished difference Result 4381 states and 5925 transitions. [2021-11-25 20:20:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:20:39,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 57 [2021-11-25 20:20:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:39,210 INFO L225 Difference]: With dead ends: 4381 [2021-11-25 20:20:39,210 INFO L226 Difference]: Without dead ends: 2315 [2021-11-25 20:20:39,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:39,213 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 945 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:39,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 579 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:20:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-11-25 20:20:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2311. [2021-11-25 20:20:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 1.325974025974026) internal successors, (3063), 2310 states have internal predecessors, (3063), 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) [2021-11-25 20:20:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3063 transitions. [2021-11-25 20:20:39,596 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3063 transitions. Word has length 57 [2021-11-25 20:20:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:39,596 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 3063 transitions. [2021-11-25 20:20:39,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-25 20:20:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3063 transitions. [2021-11-25 20:20:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 20:20:39,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:39,598 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:39,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:20:39,598 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1969903368, now seen corresponding path program 1 times [2021-11-25 20:20:39,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:39,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517668720] [2021-11-25 20:20:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:39,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:39,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:39,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517668720] [2021-11-25 20:20:39,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517668720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:39,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:39,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:39,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281855620] [2021-11-25 20:20:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:39,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:39,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:39,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:39,682 INFO L87 Difference]: Start difference. First operand 2311 states and 3063 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-25 20:20:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:40,304 INFO L93 Difference]: Finished difference Result 4987 states and 6763 transitions. [2021-11-25 20:20:40,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:40,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-25 20:20:40,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:40,315 INFO L225 Difference]: With dead ends: 4987 [2021-11-25 20:20:40,316 INFO L226 Difference]: Without dead ends: 3275 [2021-11-25 20:20:40,319 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:20:40,322 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 207 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:40,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 582 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:20:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2021-11-25 20:20:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 2979. [2021-11-25 20:20:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2978 states have (on average 1.3237071860308933) internal successors, (3942), 2978 states have internal predecessors, (3942), 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) [2021-11-25 20:20:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3942 transitions. [2021-11-25 20:20:40,936 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3942 transitions. Word has length 59 [2021-11-25 20:20:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:40,936 INFO L470 AbstractCegarLoop]: Abstraction has 2979 states and 3942 transitions. [2021-11-25 20:20:40,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-25 20:20:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3942 transitions. [2021-11-25 20:20:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 20:20:40,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:40,938 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:40,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:20:40,939 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash -583869939, now seen corresponding path program 1 times [2021-11-25 20:20:40,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:40,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036809850] [2021-11-25 20:20:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:40,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:41,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036809850] [2021-11-25 20:20:41,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036809850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:41,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:41,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:20:41,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44386782] [2021-11-25 20:20:41,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:41,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:20:41,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:20:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:20:41,092 INFO L87 Difference]: Start difference. First operand 2979 states and 3942 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 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) [2021-11-25 20:20:42,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:42,687 INFO L93 Difference]: Finished difference Result 6236 states and 8218 transitions. [2021-11-25 20:20:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:20:42,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 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 60 [2021-11-25 20:20:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:42,699 INFO L225 Difference]: With dead ends: 6236 [2021-11-25 20:20:42,699 INFO L226 Difference]: Without dead ends: 6234 [2021-11-25 20:20:42,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:20:42,702 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 1504 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:42,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 2251 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:20:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2021-11-25 20:20:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 3480. [2021-11-25 20:20:43,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3480 states, 3479 states have (on average 1.3179074446680081) internal successors, (4585), 3479 states have internal predecessors, (4585), 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) [2021-11-25 20:20:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3480 states to 3480 states and 4585 transitions. [2021-11-25 20:20:43,542 INFO L78 Accepts]: Start accepts. Automaton has 3480 states and 4585 transitions. Word has length 60 [2021-11-25 20:20:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:43,543 INFO L470 AbstractCegarLoop]: Abstraction has 3480 states and 4585 transitions. [2021-11-25 20:20:43,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 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) [2021-11-25 20:20:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3480 states and 4585 transitions. [2021-11-25 20:20:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 20:20:43,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:43,545 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:43,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:20:43,546 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1377387279, now seen corresponding path program 1 times [2021-11-25 20:20:43,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:43,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565145594] [2021-11-25 20:20:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:43,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:43,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:43,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565145594] [2021-11-25 20:20:43,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565145594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:43,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:43,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:20:43,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805807031] [2021-11-25 20:20:43,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:43,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:20:43,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:43,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:20:43,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:20:43,681 INFO L87 Difference]: Start difference. First operand 3480 states and 4585 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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) [2021-11-25 20:20:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:45,443 INFO L93 Difference]: Finished difference Result 6094 states and 8033 transitions. [2021-11-25 20:20:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:20:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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 66 [2021-11-25 20:20:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:45,449 INFO L225 Difference]: With dead ends: 6094 [2021-11-25 20:20:45,450 INFO L226 Difference]: Without dead ends: 6092 [2021-11-25 20:20:45,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:20:45,452 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 1252 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:45,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 1874 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:20:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6092 states. [2021-11-25 20:20:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6092 to 3751. [2021-11-25 20:20:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 1.3141333333333334) internal successors, (4928), 3750 states have internal predecessors, (4928), 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) [2021-11-25 20:20:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 4928 transitions. [2021-11-25 20:20:46,561 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 4928 transitions. Word has length 66 [2021-11-25 20:20:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:46,561 INFO L470 AbstractCegarLoop]: Abstraction has 3751 states and 4928 transitions. [2021-11-25 20:20:46,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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) [2021-11-25 20:20:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 4928 transitions. [2021-11-25 20:20:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 20:20:46,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:46,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:46,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:20:46,565 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:20:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:46,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2087330740, now seen corresponding path program 1 times [2021-11-25 20:20:46,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:46,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697756809] [2021-11-25 20:20:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:46,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:47,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:47,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697756809] [2021-11-25 20:20:47,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697756809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:47,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226788437] [2021-11-25 20:20:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:47,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:47,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:47,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:47,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:20:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 20:20:47,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:50,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:55,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226788437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:55,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043629819] [2021-11-25 20:20:55,500 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2021-11-25 20:20:55,500 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:55,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:55,510 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:55,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:55,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:20:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:55,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:20:58,495 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:21:39,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2043629819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:39,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:21:39,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [16, 17, 17] total 77 [2021-11-25 20:21:39,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225648001] [2021-11-25 20:21:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:39,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 20:21:39,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 20:21:39,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1100, Invalid=4752, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 20:21:39,357 INFO L87 Difference]: Start difference. First operand 3751 states and 4928 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 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) [2021-11-25 20:21:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:51,644 INFO L93 Difference]: Finished difference Result 5259 states and 6957 transitions. [2021-11-25 20:21:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-25 20:21:51,644 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 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 68 [2021-11-25 20:21:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:51,647 INFO L225 Difference]: With dead ends: 5259 [2021-11-25 20:21:51,648 INFO L226 Difference]: Without dead ends: 3737 [2021-11-25 20:21:51,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 145 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=1100, Invalid=4752, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 20:21:51,653 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 46 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 5377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 5378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:51,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 658 Invalid, 5378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5377 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2021-11-25 20:21:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-11-25 20:21:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3737. [2021-11-25 20:21:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 1.3150428265524625) internal successors, (4913), 3736 states have internal predecessors, (4913), 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) [2021-11-25 20:21:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 4913 transitions. [2021-11-25 20:21:52,789 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 4913 transitions. Word has length 68 [2021-11-25 20:21:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:52,789 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 4913 transitions. [2021-11-25 20:21:52,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 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) [2021-11-25 20:21:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 4913 transitions. [2021-11-25 20:21:52,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 20:21:52,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:52,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:52,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:53,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:53,014 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:21:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1366895842, now seen corresponding path program 1 times [2021-11-25 20:21:53,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126077523] [2021-11-25 20:21:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:53,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:53,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:53,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126077523] [2021-11-25 20:21:53,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126077523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:53,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019939675] [2021-11-25 20:21:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:53,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:53,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:53,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:53,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:21:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:53,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:21:53,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:21:54,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:21:54,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019939675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:54,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:21:54,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 21 [2021-11-25 20:21:54,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706931733] [2021-11-25 20:21:54,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:54,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:21:54,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:54,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:21:54,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:21:54,032 INFO L87 Difference]: Start difference. First operand 3737 states and 4913 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 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) [2021-11-25 20:21:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:55,690 INFO L93 Difference]: Finished difference Result 6739 states and 8918 transitions. [2021-11-25 20:21:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:21:55,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 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 68 [2021-11-25 20:21:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:55,695 INFO L225 Difference]: With dead ends: 6739 [2021-11-25 20:21:55,695 INFO L226 Difference]: Without dead ends: 5214 [2021-11-25 20:21:55,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:21:55,699 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 1245 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:55,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 756 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:21:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2021-11-25 20:21:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 3545. [2021-11-25 20:21:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3544 states have (on average 1.3123589164785554) internal successors, (4651), 3544 states have internal predecessors, (4651), 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) [2021-11-25 20:21:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 4651 transitions. [2021-11-25 20:21:56,436 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 4651 transitions. Word has length 68 [2021-11-25 20:21:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:56,437 INFO L470 AbstractCegarLoop]: Abstraction has 3545 states and 4651 transitions. [2021-11-25 20:21:56,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 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) [2021-11-25 20:21:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 4651 transitions. [2021-11-25 20:21:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:21:56,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:56,440 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:21:56,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:56,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:56,654 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:21:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1723361321, now seen corresponding path program 1 times [2021-11-25 20:21:56,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:56,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428223963] [2021-11-25 20:21:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:56,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:56,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:56,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428223963] [2021-11-25 20:21:56,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428223963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:56,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:56,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:21:56,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65536128] [2021-11-25 20:21:56,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:56,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:21:56,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:21:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:21:56,778 INFO L87 Difference]: Start difference. First operand 3545 states and 4651 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-11-25 20:21:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:58,296 INFO L93 Difference]: Finished difference Result 5632 states and 7442 transitions. [2021-11-25 20:21:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:21:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 69 [2021-11-25 20:21:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:58,303 INFO L225 Difference]: With dead ends: 5632 [2021-11-25 20:21:58,303 INFO L226 Difference]: Without dead ends: 5630 [2021-11-25 20:21:58,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:21:58,306 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 1280 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:58,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 2336 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:21:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2021-11-25 20:21:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 3513. [2021-11-25 20:21:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 1.3129271070615034) internal successors, (4611), 3512 states have internal predecessors, (4611), 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) [2021-11-25 20:21:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 4611 transitions. [2021-11-25 20:21:59,077 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 4611 transitions. Word has length 69 [2021-11-25 20:21:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:59,078 INFO L470 AbstractCegarLoop]: Abstraction has 3513 states and 4611 transitions. [2021-11-25 20:21:59,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-11-25 20:21:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 4611 transitions. [2021-11-25 20:21:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:21:59,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:59,081 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:21:59,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 20:21:59,082 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:21:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1684248653, now seen corresponding path program 1 times [2021-11-25 20:21:59,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:59,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862769932] [2021-11-25 20:21:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:59,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:59,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:59,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862769932] [2021-11-25 20:21:59,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862769932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:59,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:59,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:21:59,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099471530] [2021-11-25 20:21:59,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:59,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:21:59,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:21:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:21:59,212 INFO L87 Difference]: Start difference. First operand 3513 states and 4611 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-11-25 20:22:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:00,954 INFO L93 Difference]: Finished difference Result 6022 states and 7925 transitions. [2021-11-25 20:22:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:22:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 69 [2021-11-25 20:22:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:00,961 INFO L225 Difference]: With dead ends: 6022 [2021-11-25 20:22:00,961 INFO L226 Difference]: Without dead ends: 6020 [2021-11-25 20:22:00,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:22:00,964 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 1210 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:00,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 2360 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:22:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6020 states. [2021-11-25 20:22:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6020 to 3803. [2021-11-25 20:22:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 1.3103629668595476) internal successors, (4982), 3802 states have internal predecessors, (4982), 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) [2021-11-25 20:22:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 4982 transitions. [2021-11-25 20:22:01,857 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 4982 transitions. Word has length 69 [2021-11-25 20:22:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:01,857 INFO L470 AbstractCegarLoop]: Abstraction has 3803 states and 4982 transitions. [2021-11-25 20:22:01,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-11-25 20:22:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 4982 transitions. [2021-11-25 20:22:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:22:01,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:01,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:01,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 20:22:01,861 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:22:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:01,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1065306284, now seen corresponding path program 1 times [2021-11-25 20:22:01,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:01,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047654954] [2021-11-25 20:22:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:01,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:02,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:02,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047654954] [2021-11-25 20:22:02,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047654954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:02,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396826241] [2021-11-25 20:22:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:02,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:02,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:02,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:02,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:22:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:02,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-25 20:22:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:07,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:22,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396826241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:22,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419009349] [2021-11-25 20:22:22,163 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2021-11-25 20:22:22,163 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:22:22,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:22:22,164 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:22:22,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:22,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:22,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:22,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:22,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:22:22,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:22,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:22,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:22:27,220 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:23:27,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [419009349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:27,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:23:27,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [16, 25, 25] total 101 [2021-11-25 20:23:27,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384103080] [2021-11-25 20:23:27,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:27,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 20:23:27,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 20:23:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1827, Invalid=8273, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 20:23:27,284 INFO L87 Difference]: Start difference. First operand 3803 states and 4982 transitions. Second operand has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 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) [2021-11-25 20:23:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:44,699 INFO L93 Difference]: Finished difference Result 5414 states and 7150 transitions. [2021-11-25 20:23:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-25 20:23:44,700 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 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 69 [2021-11-25 20:23:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:44,703 INFO L225 Difference]: With dead ends: 5414 [2021-11-25 20:23:44,704 INFO L226 Difference]: Without dead ends: 3808 [2021-11-25 20:23:44,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 113 SyntacticMatches, 11 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 63.9s TimeCoverageRelationStatistics Valid=1827, Invalid=8273, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 20:23:44,709 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 65 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 7870 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 7874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:44,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 478 Invalid, 7874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7870 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2021-11-25 20:23:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-11-25 20:23:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3807. [2021-11-25 20:23:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3806 states have (on average 1.3100367840252234) internal successors, (4986), 3806 states have internal predecessors, (4986), 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) [2021-11-25 20:23:45,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 4986 transitions. [2021-11-25 20:23:45,585 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 4986 transitions. Word has length 69 [2021-11-25 20:23:45,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:45,585 INFO L470 AbstractCegarLoop]: Abstraction has 3807 states and 4986 transitions. [2021-11-25 20:23:45,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 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) [2021-11-25 20:23:45,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 4986 transitions. [2021-11-25 20:23:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:23:45,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:45,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:45,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:45,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:45,788 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:23:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1092583132, now seen corresponding path program 1 times [2021-11-25 20:23:45,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:45,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250378560] [2021-11-25 20:23:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:45,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:23:46,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250378560] [2021-11-25 20:23:46,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250378560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064858447] [2021-11-25 20:23:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:46,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:46,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:46,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:46,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:23:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 20:23:46,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:23:48,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:23:53,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064858447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:23:53,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698243766] [2021-11-25 20:23:53,251 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2021-11-25 20:23:53,252 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:53,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:53,252 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:53,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:23:53,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:53,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:53,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:53,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:23:53,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:53,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:53,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:24:24,997 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:25:46,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '251247#(and (= ~__return_1867~0 0) (= ~__return_2409~0 0) (= ~__return_1391~0 0) (= ~__return_1231~0 0) (<= 1 ~__return_1191~0) (= ~__return_1221~0 0) (<= ~send3~0 127) (= ~__return_1371~0 0) (<= 0 ~id3~0) (<= (+ |ULTIMATE.start_main_~node1__m1~64#1| 1) 0) (= ~__return_1281~0 0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~37#1| 1) 0) (<= |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~13#1| 127) (= ~__return_1401~0 0) (= ~__return_1451~0 0) (<= 1 ~__return_103~0) (<= 1 ~__return_2215~0) (= ~__return_4237~0 0) (<= ~st3~0 0) (<= 0 |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~10#1|) (= ~__return_1331~0 0) (= ~__return_1181~0 0) (<= 0 (+ ~p1_old~0 1)) (= ~__return_1461~0 0) (= ~__return_1241~0 0) (= ~__return_1571~0 0) (<= 0 ~id1~0) (= ~__return_4374~0 0) (= ~__return_1291~0 0) (= |ULTIMATE.start_main_~check__tmp~69#1| 1) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 1 ~r1~0) (= ~__return_1381~0 0) (= ~__return_1471~0 0) (= ~__return_1121~0 0) (= ~__return_1421~0 0) (= ~__return_1271~0 0) (= ~__return_1171~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~43#1| 1)) (= ~__return_1101~0 0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (= ~__return_3325~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~36#1| 1)) (= ~__return_3264~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~46#1| 1) 0) (= ~__return_2711~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~46#1| 1)) (= ~__return_1441~0 0) (= ~__return_1141~0 0) (<= ~mode2~0 1) (= ~__return_1491~0 0) (<= 0 ~st1~0) (<= ~__return_1191~0 1) (= |ULTIMATE.start_main_~check__tmp~67#1| 1) (<= |ULTIMATE.start_main_~assert__arg~68#1| 1) (<= ~__return_103~0 1) (<= 0 ~st2~0) (= ~__return_2299~0 0) (= ~__return_1341~0 0) (<= ~mode3~0 1) (= ~__return_1311~0 0) (= ~__return_1251~0 0) (= ~__return_3177~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~37#1| 1)) (= ~__return_1321~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~66#1|) (<= 0 ~send2~0) (= ~__return_3610~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= 0 (+ ~p2_old~0 1)) (= ~__return_1551~0 0) (<= ~id1~0 127) (= ~__return_1151~0 0) (= ~__return_1531~0 0) (= ~__return_4015~0 0) (= ~__return_4126~0 0) (= ~__return_3499~0 0) (= ~__return_1301~0 0) (<= |ULTIMATE.start_main_~assert__arg~66#1| 1) (= ~__return_1561~0 0) (= ~__return_1131~0 0) (<= ~send2~0 127) (= ~__return_2650~0 0) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 (+ ~p2_new~0 1)) (= ~__return_1351~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (= ~__return_1431~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~44#1| 1)) (= ~__return_2798~0 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= |ULTIMATE.start_main_~__tmp_67~0#1| 1) (<= ~__return_5061~0 1) (<= ~st2~0 0) (= ~__return_3817~0 0) (<= (+ ~p2_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~47#1| 1)) (= ~__return_1261~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~64#1| 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~43#1| 1) 0) (= ~__return_1201~0 0) (= ~__return_2885~0 0) (<= |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~10#1| 127) (= ~__return_1481~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (= ~__return_2563~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_69~0#1|) (<= ~id3~0 127) (= ~__return_1501~0 0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (= ~__return_1521~0 0) (<= 0 |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~13#1|) (<= ~__return_2215~0 1) (= ~__return_1361~0 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (<= |ULTIMATE.start_main_~__tmp_69~0#1| 1) (<= 0 |ULTIMATE.start_main_~assert__arg~68#1|) (= ~__return_2061~0 0) (<= (+ ~p3_new~0 1) 0) (= ~__return_1211~0 0) (= ~__return_1161~0 0) (= ~__return_1951~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~47#1| 1) 0) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= ~__return_3928~0 0) (<= (+ ~p1_old~0 1) 0) (<= |ULTIMATE.start_main_~check__tmp~58#1| 1) (<= 0 ~send3~0) (= ~p1~0 0) (= ~__return_1541~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~__tmp_67~0#1|) (= ~__return_main~0 0) (= ~__return_3412~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~36#1| 1) 0) (<= (+ |ULTIMATE.start_main_~node3__m3~44#1| 1) 0) (= ~__return_2996~0 0) (= ~__return_1111~0 0) (= ~__return_1511~0 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= ~__return_1411~0 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2021-11-25 20:25:46,737 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:25:46,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:25:46,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2021-11-25 20:25:46,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866320597] [2021-11-25 20:25:46,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:25:46,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 20:25:46,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:25:46,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 20:25:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1084, Invalid=6926, Unknown=0, NotChecked=0, Total=8010 [2021-11-25 20:25:46,742 INFO L87 Difference]: Start difference. First operand 3807 states and 4986 transitions. Second operand has 43 states, 43 states have (on average 4.558139534883721) internal successors, (196), 43 states have internal predecessors, (196), 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) [2021-11-25 20:26:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:26:08,201 INFO L93 Difference]: Finished difference Result 18364 states and 24654 transitions. [2021-11-25 20:26:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-25 20:26:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.558139534883721) internal successors, (196), 43 states have internal predecessors, (196), 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 69 [2021-11-25 20:26:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:26:08,219 INFO L225 Difference]: With dead ends: 18364 [2021-11-25 20:26:08,220 INFO L226 Difference]: Without dead ends: 16339 [2021-11-25 20:26:08,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 123 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13952 ImplicationChecksByTransitivity, 95.4s TimeCoverageRelationStatistics Valid=3539, Invalid=29041, Unknown=0, NotChecked=0, Total=32580 [2021-11-25 20:26:08,231 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 4854 mSDsluCounter, 4680 mSDsCounter, 0 mSdLazyCounter, 5307 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4854 SdHoareTripleChecker+Valid, 4962 SdHoareTripleChecker+Invalid, 5960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 5307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:26:08,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4854 Valid, 4962 Invalid, 5960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 5307 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-25 20:26:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16339 states. [2021-11-25 20:26:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16339 to 7460. [2021-11-25 20:26:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 7459 states have (on average 1.3145193725700497) internal successors, (9805), 7459 states have internal predecessors, (9805), 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) [2021-11-25 20:26:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 9805 transitions. [2021-11-25 20:26:10,356 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 9805 transitions. Word has length 69 [2021-11-25 20:26:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:26:10,357 INFO L470 AbstractCegarLoop]: Abstraction has 7460 states and 9805 transitions. [2021-11-25 20:26:10,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.558139534883721) internal successors, (196), 43 states have internal predecessors, (196), 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) [2021-11-25 20:26:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 9805 transitions. [2021-11-25 20:26:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:26:10,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:26:10,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:26:10,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:26:10,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 20:26:10,574 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:26:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:26:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1048136402, now seen corresponding path program 1 times [2021-11-25 20:26:10,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:26:10,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718556506] [2021-11-25 20:26:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:10,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:26:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:26:10,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:26:10,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718556506] [2021-11-25 20:26:10,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718556506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:26:10,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:26:10,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:26:10,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255347343] [2021-11-25 20:26:10,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:26:10,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:26:10,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:26:10,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:26:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:26:10,683 INFO L87 Difference]: Start difference. First operand 7460 states and 9805 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 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) [2021-11-25 20:26:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:26:14,695 INFO L93 Difference]: Finished difference Result 12384 states and 16164 transitions. [2021-11-25 20:26:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:26:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 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 70 [2021-11-25 20:26:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:26:14,707 INFO L225 Difference]: With dead ends: 12384 [2021-11-25 20:26:14,707 INFO L226 Difference]: Without dead ends: 10638 [2021-11-25 20:26:14,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:26:14,711 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 1106 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:26:14,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 1413 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:26:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10638 states. [2021-11-25 20:26:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10638 to 7441. [2021-11-25 20:26:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7441 states, 7440 states have (on average 1.3149193548387097) internal successors, (9783), 7440 states have internal predecessors, (9783), 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) [2021-11-25 20:26:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7441 states to 7441 states and 9783 transitions. [2021-11-25 20:26:16,879 INFO L78 Accepts]: Start accepts. Automaton has 7441 states and 9783 transitions. Word has length 70 [2021-11-25 20:26:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:26:16,879 INFO L470 AbstractCegarLoop]: Abstraction has 7441 states and 9783 transitions. [2021-11-25 20:26:16,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 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) [2021-11-25 20:26:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 7441 states and 9783 transitions. [2021-11-25 20:26:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:26:16,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:26:16,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:26:16,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 20:26:16,883 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:26:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:26:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash -517315488, now seen corresponding path program 1 times [2021-11-25 20:26:16,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:26:16,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907918894] [2021-11-25 20:26:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:16,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:26:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:26:17,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:26:17,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907918894] [2021-11-25 20:26:17,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907918894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:26:17,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277706709] [2021-11-25 20:26:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:17,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:26:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:26:17,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:26:17,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:26:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:17,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-25 20:26:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:26:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:26:21,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:26:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:26:32,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277706709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:26:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [262012772] [2021-11-25 20:26:32,550 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2021-11-25 20:26:32,550 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:26:32,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:26:32,551 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:26:32,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:26:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:26:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:26:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:26:32,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:26:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:26:32,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:26:32,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:26:35,521 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:31,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [262012772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:31,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:27:31,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [16, 25, 25] total 99 [2021-11-25 20:27:31,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525153659] [2021-11-25 20:27:31,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:31,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-25 20:27:31,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:31,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-25 20:27:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1755, Invalid=7947, Unknown=0, NotChecked=0, Total=9702 [2021-11-25 20:27:31,241 INFO L87 Difference]: Start difference. First operand 7441 states and 9783 transitions. Second operand has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 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) [2021-11-25 20:27:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:48,175 INFO L93 Difference]: Finished difference Result 9367 states and 12368 transitions. [2021-11-25 20:27:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 20:27:48,175 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 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 71 [2021-11-25 20:27:48,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:48,182 INFO L225 Difference]: With dead ends: 9367 [2021-11-25 20:27:48,182 INFO L226 Difference]: Without dead ends: 7430 [2021-11-25 20:27:48,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5349 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=1755, Invalid=7947, Unknown=0, NotChecked=0, Total=9702 [2021-11-25 20:27:48,186 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 63 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 7040 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 7044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:48,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 611 Invalid, 7044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7040 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2021-11-25 20:27:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7430 states. [2021-11-25 20:27:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7430 to 7430. [2021-11-25 20:27:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 1.3145780051150895) internal successors, (9766), 7429 states have internal predecessors, (9766), 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) [2021-11-25 20:27:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 9766 transitions. [2021-11-25 20:27:50,211 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 9766 transitions. Word has length 71 [2021-11-25 20:27:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:50,212 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 9766 transitions. [2021-11-25 20:27:50,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 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) [2021-11-25 20:27:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 9766 transitions. [2021-11-25 20:27:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:27:50,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:50,214 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:27:50,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:50,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-25 20:27:50,415 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:27:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash 412284185, now seen corresponding path program 1 times [2021-11-25 20:27:50,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:50,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175193258] [2021-11-25 20:27:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:50,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:27:50,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:50,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175193258] [2021-11-25 20:27:50,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175193258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:50,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:50,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:27:50,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250026066] [2021-11-25 20:27:50,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:50,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:27:50,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:27:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:27:50,464 INFO L87 Difference]: Start difference. First operand 7430 states and 9766 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-25 20:27:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:53,089 INFO L93 Difference]: Finished difference Result 11093 states and 14763 transitions. [2021-11-25 20:27:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:27:53,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-11-25 20:27:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:53,144 INFO L225 Difference]: With dead ends: 11093 [2021-11-25 20:27:53,144 INFO L226 Difference]: Without dead ends: 9839 [2021-11-25 20:27:53,147 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:27:53,147 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 203 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:53,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 567 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:27:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9839 states. [2021-11-25 20:27:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9839 to 9300. [2021-11-25 20:27:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9300 states, 9299 states have (on average 1.3088504140230133) internal successors, (12171), 9299 states have internal predecessors, (12171), 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) [2021-11-25 20:27:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9300 states to 9300 states and 12171 transitions. [2021-11-25 20:27:55,624 INFO L78 Accepts]: Start accepts. Automaton has 9300 states and 12171 transitions. Word has length 71 [2021-11-25 20:27:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:55,625 INFO L470 AbstractCegarLoop]: Abstraction has 9300 states and 12171 transitions. [2021-11-25 20:27:55,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-25 20:27:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 9300 states and 12171 transitions. [2021-11-25 20:27:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:27:55,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:55,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:55,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 20:27:55,627 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:27:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash -847364941, now seen corresponding path program 1 times [2021-11-25 20:27:55,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:55,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276117388] [2021-11-25 20:27:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:55,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:27:56,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:56,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276117388] [2021-11-25 20:27:56,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276117388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:56,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914668372] [2021-11-25 20:27:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:56,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:56,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:56,074 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:56,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b530cd8e-eabb-47fe-ba02-83af6c74ef7c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:27:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:56,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-25 20:27:56,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:28:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:28:00,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:28:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:28:26,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914668372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:28:26,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560159783] [2021-11-25 20:28:26,199 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2021-11-25 20:28:26,199 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:28:26,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:28:26,200 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:28:26,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:28:26,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:28:26,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:28:26,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:28:26,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:28:26,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:28:26,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:28:26,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:28:45,557 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:30:26,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '387174#(and (= ~__return_1867~0 0) (= ~__return_2409~0 0) (= ~__return_1391~0 0) (= ~__return_1231~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_22~0#1|) (= |ULTIMATE.start_main_~check__tmp~21#1| 1) (<= 0 ~id3~0) (<= 0 |ULTIMATE.start_main_~assert__arg~49#1|) (= ~__return_1281~0 0) (<= 0 (+ ~p3_new~0 1)) (= ~__return_1401~0 0) (= ~__return_1451~0 0) (<= 1 ~__return_103~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~13#1|) (= ~__return_1331~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~11#1| 1) 0) (= ~__return_1181~0 0) (= ~__return_1461~0 0) (= ~__return_1241~0 0) (= ~__return_1571~0 0) (<= 0 ~id1~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~45#1| 1)) (= ~__return_4374~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~19#1| 1)) (<= ~__return_3325~0 1) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 1 ~r1~0) (= ~__return_1381~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~19#1| 1) 0) (= ~__return_1471~0 0) (= ~__return_1121~0 0) (= ~__return_1421~0 0) (= ~__return_1271~0 0) (= ~__return_1171~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_50~0#1|) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~31#1| 1)) (<= 0 |ULTIMATE.start_main_~assert__arg~21#1|) (<= ~send1~0 127) (<= ~st1~0 0) (= ~__return_3264~0 0) (= ~__return_2711~0 0) (= ~__return_1441~0 0) (<= 0 (+ ~p3_old~0 1)) (= ~__return_1141~0 0) (<= 1 ~__return_3325~0) (<= ~mode2~0 1) (= ~__return_1491~0 0) (<= 0 ~st1~0) (<= ~r1~0 257) (<= ~__return_103~0 1) (<= 0 ~st2~0) (<= ~__return_1521~0 1) (<= ~mode3~0 1) (= ~__return_1311~0 0) (= ~__return_1251~0 0) (= ~__return_3177~0 0) (= ~__return_1321~0 0) (<= 0 ~__return_2299~0) (= ~__return_3610~0 0) (<= ~__return_1371~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (= ~__return_1551~0 0) (<= ~id1~0 127) (= ~__return_1531~0 0) (<= (+ ~p3_old~0 1) 0) (= ~__return_4015~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~34#1| 1)) (= ~__return_3499~0 0) (= ~__return_1561~0 0) (<= |ULTIMATE.start_main_~__tmp_50~0#1| 1) (<= ~__return_1191~0 0) (<= 0 ~__return_1101~0) (= ~__return_1131~0 0) (<= |ULTIMATE.start_main_~assert__arg~49#1| 1) (<= ~__return_1301~0 0) (<= ~__return_3928~0 0) (<= 0 ~__return_1371~0) (= ~__return_2650~0 0) (= |ULTIMATE.start_main_~check__tmp~49#1| 1) (<= 0 ~__return_1351~0) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (= ~__return_1431~0 0) (= ~__return_2798~0 0) (<= ~__return_1221~0 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~__return_5061~0 1) (= ~__return_3817~0 0) (<= (+ ~p2_new~0 1) 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~13#1| 127) (<= 0 ~__return_1211~0) (<= ~__return_1361~0 0) (<= 0 ~__return_1221~0) (<= ~__return_1101~0 0) (= ~__return_1261~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~45#1| 1) 0) (<= 0 ~__return_4237~0) (= ~__return_1201~0 0) (<= ~__return_1211~0 0) (<= |ULTIMATE.start_main_~assert__arg~21#1| 1) (= ~__return_2885~0 0) (= ~__return_1481~0 0) (<= ~__return_1341~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (= ~__return_2563~0 0) (<= ~id3~0 127) (<= ~__return_2299~0 0) (<= ~__return_1151~0 0) (<= 0 ~__return_2215~0) (= ~__return_1501~0 0) (<= ~__return_1351~0 0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= (+ |ULTIMATE.start_main_~node2__m2~34#1| 1) 0) (<= ~__return_4237~0 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= ~__return_4126~0 0) (<= 0 ~__return_1291~0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~__tmp_22~0#1| 1) (<= 1 ~__return_1521~0) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (= ~__return_2061~0 0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~__return_1161~0 0) (= ~__return_1951~0 0) (= ~p3~0 0) (<= 0 ~__return_4126~0) (<= 0 (+ ~p1_new~0 1)) (<= ~__return_2215~0 0) (<= 0 ~__return_1191~0) (<= |ULTIMATE.start_main_~check__tmp~58#1| 1) (<= 0 ~__return_1341~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (<= 0 ~__return_3928~0) (= ~p1~0 0) (= ~__return_1541~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= ~__return_1291~0 0) (= ~__return_main~0 0) (<= 0 ~__return_1151~0) (= ~__return_3412~0 0) (<= 0 ~__return_1301~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~11#1| 1)) (<= 0 ~__return_1361~0) (= ~__return_2996~0 0) (= ~__return_1111~0 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (<= (+ |ULTIMATE.start_main_~node3__m3~31#1| 1) 0) (= ~__return_1511~0 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= ~__return_1411~0 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2021-11-25 20:30:26,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:30:26,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:30:26,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 27] total 66 [2021-11-25 20:30:26,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888112350] [2021-11-25 20:30:26,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:30:26,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-25 20:30:26,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-25 20:30:26,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2033, Invalid=11539, Unknown=0, NotChecked=0, Total=13572 [2021-11-25 20:30:26,949 INFO L87 Difference]: Start difference. First operand 9300 states and 12171 transitions. Second operand has 66 states, 66 states have (on average 3.3181818181818183) internal successors, (219), 66 states have internal predecessors, (219), 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)