./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.BOUNDED-6.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_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/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_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/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_e1a37a4b-3519-4586-836b-6dddc8773df0/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 72aca9735a0330ad4ed4e9de4f21904354ce62c742d488d0b09ce6da875c2798 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:21:24,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:21:24,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:21:24,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:21:24,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:21:24,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:21:24,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:21:24,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:21:24,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:21:24,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:21:24,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:21:24,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:21:24,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:21:24,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:21:24,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:21:24,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:21:24,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:21:24,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:21:24,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:21:24,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:21:24,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:21:24,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:21:24,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:21:24,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:21:24,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:21:24,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:21:24,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:21:24,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:21:24,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:21:24,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:21:24,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:21:24,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:21:24,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:21:24,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:21:24,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:21:24,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:21:24,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:21:24,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:21:24,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:21:24,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:21:24,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:21:24,254 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:21:24,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:21:24,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:21:24,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:21:24,291 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:21:24,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:21:24,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:21:24,293 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:21:24,293 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:21:24,294 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:21:24,294 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:21:24,294 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:21:24,295 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:21:24,295 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:21:24,296 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:21:24,296 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:21:24,297 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:21:24,297 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:21:24,297 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:21:24,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:21:24,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:21:24,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:21:24,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:21:24,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:21:24,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:21:24,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:21:24,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:21:24,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:21:24,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:21:24,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:21:24,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:21:24,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:21:24,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:21:24,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:24,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:21:24,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:21:24,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:21:24,306 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:21:24,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:21:24,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:21:24,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:21:24,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:21:24,308 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_e1a37a4b-3519-4586-836b-6dddc8773df0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72aca9735a0330ad4ed4e9de4f21904354ce62c742d488d0b09ce6da875c2798 [2021-11-25 20:21:24,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:21:24,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:21:24,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:21:24,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:21:24,679 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:21:24,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-25 20:21:24,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/data/51c879626/890bac8fbe98430e8a73f86fe2ce5f19/FLAG0a2373b10 [2021-11-25 20:21:25,628 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:21:25,631 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-25 20:21:25,680 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/data/51c879626/890bac8fbe98430e8a73f86fe2ce5f19/FLAG0a2373b10 [2021-11-25 20:21:26,171 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/data/51c879626/890bac8fbe98430e8a73f86fe2ce5f19 [2021-11-25 20:21:26,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:21:26,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:21:26,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:26,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:21:26,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:21:26,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:26,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5455c25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26, skipping insertion in model container [2021-11-25 20:21:26,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:26,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:21:26,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:21:26,784 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8448,8461] [2021-11-25 20:21:26,824 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12616,12629] [2021-11-25 20:21:26,921 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20366,20379] [2021-11-25 20:21:26,979 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27098,27111] [2021-11-25 20:21:27,089 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[47963,47976] [2021-11-25 20:21:27,202 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[73065,73078] [2021-11-25 20:21:27,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:27,490 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:21:27,541 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8448,8461] [2021-11-25 20:21:27,571 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12616,12629] [2021-11-25 20:21:27,623 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20366,20379] [2021-11-25 20:21:27,669 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27098,27111] [2021-11-25 20:21:27,800 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[47963,47976] [2021-11-25 20:21:27,932 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_e1a37a4b-3519-4586-836b-6dddc8773df0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[73065,73078] [2021-11-25 20:21:28,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:28,147 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:21:28,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28 WrapperNode [2021-11-25 20:21:28,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:28,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:28,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:21:28,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:21:28,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,382 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5697 [2021-11-25 20:21:28,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:28,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:21:28,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:21:28,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:21:28,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:21:28,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:21:28,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:21:28,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:21:28,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (1/1) ... [2021-11-25 20:21:28,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:28,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:28,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:21:28,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:21:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:21:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:21:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:21:28,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:21:29,150 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:21:29,152 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:21:32,221 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:21:32,692 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:21:32,692 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:21:32,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:32 BoogieIcfgContainer [2021-11-25 20:21:32,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:21:32,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:21:32,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:21:32,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:21:32,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:21:26" (1/3) ... [2021-11-25 20:21:32,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4bac1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:32, skipping insertion in model container [2021-11-25 20:21:32,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:28" (2/3) ... [2021-11-25 20:21:32,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4bac1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:32, skipping insertion in model container [2021-11-25 20:21:32,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:32" (3/3) ... [2021-11-25 20:21:32,709 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-25 20:21:32,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:21:32,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-25 20:21:32,782 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:21:32,790 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 20:21:32,790 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-25 20:21:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 1134 states, 1127 states have (on average 1.7870452528837621) internal successors, (2014), 1133 states have internal predecessors, (2014), 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 20:21:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:21:32,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:32,889 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 20:21:32,890 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 20:21:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash 440971975, now seen corresponding path program 1 times [2021-11-25 20:21:32,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:32,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771211629] [2021-11-25 20:21:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:32,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:33,495 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 20:21:33,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:33,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771211629] [2021-11-25 20:21:33,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771211629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:33,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:33,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:33,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501256631] [2021-11-25 20:21:33,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:33,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:33,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:33,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:33,561 INFO L87 Difference]: Start difference. First operand has 1134 states, 1127 states have (on average 1.7870452528837621) internal successors, (2014), 1133 states have internal predecessors, (2014), 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 10.2) internal successors, (51), 4 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 20:21:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:35,365 INFO L93 Difference]: Finished difference Result 2051 states and 3535 transitions. [2021-11-25 20:21:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 20:21:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:35,404 INFO L225 Difference]: With dead ends: 2051 [2021-11-25 20:21:35,404 INFO L226 Difference]: Without dead ends: 1335 [2021-11-25 20:21:35,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:21:35,423 INFO L933 BasicCegarLoop]: 1068 mSDtfsCounter, 6254 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6254 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:35,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6254 Valid, 1399 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:21:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-11-25 20:21:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1321. [2021-11-25 20:21:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1315 states have (on average 1.2631178707224335) internal successors, (1661), 1320 states have internal predecessors, (1661), 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 20:21:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1661 transitions. [2021-11-25 20:21:35,617 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1661 transitions. Word has length 51 [2021-11-25 20:21:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:35,618 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1661 transitions. [2021-11-25 20:21:35,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 20:21:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1661 transitions. [2021-11-25 20:21:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:21:35,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:35,625 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 20:21:35,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:21:35,626 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 20:21:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash -230979491, now seen corresponding path program 1 times [2021-11-25 20:21:35,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:35,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719745749] [2021-11-25 20:21:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:35,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:35,911 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 20:21:35,911 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:35,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719745749] [2021-11-25 20:21:35,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719745749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:35,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:35,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:35,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110541207] [2021-11-25 20:21:35,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:35,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:35,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:35,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:35,922 INFO L87 Difference]: Start difference. First operand 1321 states and 1661 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 20:21:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:37,213 INFO L93 Difference]: Finished difference Result 2410 states and 3059 transitions. [2021-11-25 20:21:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 20:21:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:37,226 INFO L225 Difference]: With dead ends: 2410 [2021-11-25 20:21:37,226 INFO L226 Difference]: Without dead ends: 1629 [2021-11-25 20:21:37,228 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 20:21:37,230 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 3942 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3942 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:37,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3942 Valid, 791 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 20:21:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-11-25 20:21:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1619. [2021-11-25 20:21:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1613 states have (on average 1.2665840049597024) internal successors, (2043), 1618 states have internal predecessors, (2043), 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 20:21:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 2043 transitions. [2021-11-25 20:21:37,341 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 2043 transitions. Word has length 51 [2021-11-25 20:21:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:37,342 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 2043 transitions. [2021-11-25 20:21:37,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 20:21:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 2043 transitions. [2021-11-25 20:21:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:21:37,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:37,347 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 20:21:37,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:21:37,348 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 20:21:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:37,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1941934323, now seen corresponding path program 1 times [2021-11-25 20:21:37,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:37,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303165120] [2021-11-25 20:21:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:37,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:37,458 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 20:21:37,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:37,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303165120] [2021-11-25 20:21:37,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303165120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:37,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:37,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:37,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062832891] [2021-11-25 20:21:37,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:37,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:37,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:37,462 INFO L87 Difference]: Start difference. First operand 1619 states and 2043 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 20:21:38,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:38,659 INFO L93 Difference]: Finished difference Result 3140 states and 3984 transitions. [2021-11-25 20:21:38,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:38,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 20:21:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:38,677 INFO L225 Difference]: With dead ends: 3140 [2021-11-25 20:21:38,678 INFO L226 Difference]: Without dead ends: 2338 [2021-11-25 20:21:38,680 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 20:21:38,685 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 3560 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:38,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3560 Valid, 765 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:21:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-11-25 20:21:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 2332. [2021-11-25 20:21:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2326 states have (on average 1.2519346517626828) internal successors, (2912), 2331 states have internal predecessors, (2912), 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 20:21:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2912 transitions. [2021-11-25 20:21:38,902 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2912 transitions. Word has length 51 [2021-11-25 20:21:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:38,903 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 2912 transitions. [2021-11-25 20:21:38,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 20:21:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2912 transitions. [2021-11-25 20:21:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:21:38,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:38,908 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 20:21:38,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:21:38,909 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:21:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash -274476207, now seen corresponding path program 1 times [2021-11-25 20:21:38,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:38,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460404632] [2021-11-25 20:21:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:38,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:39,142 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 20:21:39,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:39,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460404632] [2021-11-25 20:21:39,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460404632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:39,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:39,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:21:39,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025413792] [2021-11-25 20:21:39,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:39,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:21:39,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:21:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:21:39,145 INFO L87 Difference]: Start difference. First operand 2332 states and 2912 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 20:21:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:41,447 INFO L93 Difference]: Finished difference Result 4239 states and 5441 transitions. [2021-11-25 20:21:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:21:41,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 20:21:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:41,475 INFO L225 Difference]: With dead ends: 4239 [2021-11-25 20:21:41,476 INFO L226 Difference]: Without dead ends: 3875 [2021-11-25 20:21:41,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:21:41,479 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 3948 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3948 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:41,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3948 Valid, 2532 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 20:21:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-11-25 20:21:41,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2332. [2021-11-25 20:21:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2326 states have (on average 1.2515047291487533) internal successors, (2911), 2331 states have internal predecessors, (2911), 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 20:21:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2911 transitions. [2021-11-25 20:21:41,704 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2911 transitions. Word has length 53 [2021-11-25 20:21:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:41,705 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 2911 transitions. [2021-11-25 20:21:41,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 20:21:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2911 transitions. [2021-11-25 20:21:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:21:41,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:41,710 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 20:21:41,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:21:41,710 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:21:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:41,711 INFO L85 PathProgramCache]: Analyzing trace with hash -603870735, now seen corresponding path program 1 times [2021-11-25 20:21:41,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478822586] [2021-11-25 20:21:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:41,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:41,933 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 20:21:41,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:41,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478822586] [2021-11-25 20:21:41,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478822586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:41,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:41,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:21:41,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846872276] [2021-11-25 20:21:41,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:41,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:21:41,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:41,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:21:41,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:21:41,936 INFO L87 Difference]: Start difference. First operand 2332 states and 2911 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 20:21:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:44,511 INFO L93 Difference]: Finished difference Result 3775 states and 4807 transitions. [2021-11-25 20:21:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:21:44,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 20:21:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:44,543 INFO L225 Difference]: With dead ends: 3775 [2021-11-25 20:21:44,544 INFO L226 Difference]: Without dead ends: 3769 [2021-11-25 20:21:44,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:21:44,549 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 2994 mSDsluCounter, 2374 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2994 SdHoareTripleChecker+Valid, 2983 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:44,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2994 Valid, 2983 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 20:21:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-11-25 20:21:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 2332. [2021-11-25 20:21:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2326 states have (on average 1.2510748065348238) internal successors, (2910), 2331 states have internal predecessors, (2910), 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 20:21:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2910 transitions. [2021-11-25 20:21:44,794 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2910 transitions. Word has length 53 [2021-11-25 20:21:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:44,798 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 2910 transitions. [2021-11-25 20:21:44,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 20:21:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2910 transitions. [2021-11-25 20:21:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:21:44,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:44,803 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, 1] [2021-11-25 20:21:44,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:21:44,803 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 20:21:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:44,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1273862225, now seen corresponding path program 1 times [2021-11-25 20:21:44,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:44,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886796105] [2021-11-25 20:21:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:44,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:44,978 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 20:21:44,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:44,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886796105] [2021-11-25 20:21:44,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886796105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:44,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:44,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:21:44,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836443212] [2021-11-25 20:21:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:44,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:21:44,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:44,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:21:44,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:21:44,981 INFO L87 Difference]: Start difference. First operand 2332 states and 2910 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 20:21:46,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:46,777 INFO L93 Difference]: Finished difference Result 3883 states and 4973 transitions. [2021-11-25 20:21:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:21:46,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 20:21:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:46,801 INFO L225 Difference]: With dead ends: 3883 [2021-11-25 20:21:46,801 INFO L226 Difference]: Without dead ends: 3375 [2021-11-25 20:21:46,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:21:46,808 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 3702 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3702 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:46,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3702 Valid, 1675 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 20:21:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-11-25 20:21:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2332. [2021-11-25 20:21:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2326 states have (on average 1.2506448839208943) internal successors, (2909), 2331 states have internal predecessors, (2909), 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 20:21:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2909 transitions. [2021-11-25 20:21:47,053 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2909 transitions. Word has length 53 [2021-11-25 20:21:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:47,054 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 2909 transitions. [2021-11-25 20:21:47,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 20:21:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2909 transitions. [2021-11-25 20:21:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:21:47,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:47,059 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 20:21:47,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:21:47,059 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 20:21:47,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:47,060 INFO L85 PathProgramCache]: Analyzing trace with hash -843774436, now seen corresponding path program 1 times [2021-11-25 20:21:47,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:47,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259817441] [2021-11-25 20:21:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:47,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:47,146 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 20:21:47,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:47,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259817441] [2021-11-25 20:21:47,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259817441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:47,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:47,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:47,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511354690] [2021-11-25 20:21:47,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:47,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:47,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:47,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:47,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:47,152 INFO L87 Difference]: Start difference. First operand 2332 states and 2909 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 20:21:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:47,557 INFO L93 Difference]: Finished difference Result 3200 states and 4082 transitions. [2021-11-25 20:21:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 20:21:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:47,572 INFO L225 Difference]: With dead ends: 3200 [2021-11-25 20:21:47,572 INFO L226 Difference]: Without dead ends: 2033 [2021-11-25 20:21:47,575 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 20:21:47,576 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 559 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:47,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 1208 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-11-25 20:21:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2031. [2021-11-25 20:21:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2025 states have (on average 1.2320987654320987) internal successors, (2495), 2030 states have internal predecessors, (2495), 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 20:21:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2495 transitions. [2021-11-25 20:21:47,838 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2495 transitions. Word has length 54 [2021-11-25 20:21:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:47,839 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 2495 transitions. [2021-11-25 20:21:47,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 20:21:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2495 transitions. [2021-11-25 20:21:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:21:47,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:47,843 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 20:21:47,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:21:47,844 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 20:21:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:47,845 INFO L85 PathProgramCache]: Analyzing trace with hash 586810076, now seen corresponding path program 1 times [2021-11-25 20:21:47,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:47,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150495812] [2021-11-25 20:21:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:47,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:47,944 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 20:21:47,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:47,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150495812] [2021-11-25 20:21:47,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150495812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:47,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:47,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:47,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662650298] [2021-11-25 20:21:47,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:47,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:47,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:47,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:47,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:47,950 INFO L87 Difference]: Start difference. First operand 2031 states and 2495 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 20:21:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:48,359 INFO L93 Difference]: Finished difference Result 3121 states and 4006 transitions. [2021-11-25 20:21:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:48,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 20:21:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:48,374 INFO L225 Difference]: With dead ends: 3121 [2021-11-25 20:21:48,374 INFO L226 Difference]: Without dead ends: 2316 [2021-11-25 20:21:48,376 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 20:21:48,377 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 421 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:48,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 1294 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-11-25 20:21:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2314. [2021-11-25 20:21:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2308 states have (on average 1.2608318890814558) internal successors, (2910), 2313 states have internal predecessors, (2910), 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 20:21:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2910 transitions. [2021-11-25 20:21:48,668 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2910 transitions. Word has length 54 [2021-11-25 20:21:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:48,669 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 2910 transitions. [2021-11-25 20:21:48,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 20:21:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2910 transitions. [2021-11-25 20:21:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:21:48,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:48,673 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 20:21:48,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:21:48,673 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 20:21:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:48,674 INFO L85 PathProgramCache]: Analyzing trace with hash -117726025, now seen corresponding path program 1 times [2021-11-25 20:21:48,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:48,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599899562] [2021-11-25 20:21:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:48,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:48,744 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 20:21:48,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:48,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599899562] [2021-11-25 20:21:48,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599899562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:48,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:48,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:48,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277075365] [2021-11-25 20:21:48,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:48,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:48,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:48,752 INFO L87 Difference]: Start difference. First operand 2314 states and 2910 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 20:21:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:49,258 INFO L93 Difference]: Finished difference Result 4188 states and 5469 transitions. [2021-11-25 20:21:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:49,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 20:21:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:49,278 INFO L225 Difference]: With dead ends: 4188 [2021-11-25 20:21:49,278 INFO L226 Difference]: Without dead ends: 2957 [2021-11-25 20:21:49,282 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 20:21:49,285 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 383 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:49,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 1317 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2021-11-25 20:21:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2955. [2021-11-25 20:21:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2949 states have (on average 1.276703967446592) internal successors, (3765), 2954 states have internal predecessors, (3765), 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 20:21:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3765 transitions. [2021-11-25 20:21:49,824 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3765 transitions. Word has length 54 [2021-11-25 20:21:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:49,825 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 3765 transitions. [2021-11-25 20:21:49,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 20:21:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3765 transitions. [2021-11-25 20:21:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 20:21:49,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:49,828 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 20:21:49,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:21:49,829 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:21:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash -812769836, now seen corresponding path program 1 times [2021-11-25 20:21:49,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:49,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801862728] [2021-11-25 20:21:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:49,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:49,913 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 20:21:49,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:49,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801862728] [2021-11-25 20:21:49,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801862728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:49,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:49,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:49,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362854756] [2021-11-25 20:21:49,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:49,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:49,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:49,919 INFO L87 Difference]: Start difference. First operand 2955 states and 3765 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 20:21:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:50,558 INFO L93 Difference]: Finished difference Result 5610 states and 7233 transitions. [2021-11-25 20:21:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:50,559 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 20:21:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:50,578 INFO L225 Difference]: With dead ends: 5610 [2021-11-25 20:21:50,578 INFO L226 Difference]: Without dead ends: 3205 [2021-11-25 20:21:50,582 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 20:21:50,583 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 620 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:50,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 880 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-11-25 20:21:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2576. [2021-11-25 20:21:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2571 states have (on average 1.2843251653053287) internal successors, (3302), 2575 states have internal predecessors, (3302), 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 20:21:50,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 3302 transitions. [2021-11-25 20:21:50,973 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 3302 transitions. Word has length 55 [2021-11-25 20:21:50,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:50,973 INFO L470 AbstractCegarLoop]: Abstraction has 2576 states and 3302 transitions. [2021-11-25 20:21:50,974 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 20:21:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 3302 transitions. [2021-11-25 20:21:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 20:21:50,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:50,977 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 20:21:50,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:21:50,977 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:21:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:50,978 INFO L85 PathProgramCache]: Analyzing trace with hash 930333266, now seen corresponding path program 1 times [2021-11-25 20:21:50,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:50,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696254409] [2021-11-25 20:21:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:50,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:51,320 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 20:21:51,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:51,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696254409] [2021-11-25 20:21:51,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696254409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:51,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:51,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:21:51,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906597400] [2021-11-25 20:21:51,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:51,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:21:51,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:21:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:21:51,322 INFO L87 Difference]: Start difference. First operand 2576 states and 3302 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 20:21:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:53,123 INFO L93 Difference]: Finished difference Result 5114 states and 6543 transitions. [2021-11-25 20:21:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:21:53,123 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 20:21:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:53,138 INFO L225 Difference]: With dead ends: 5114 [2021-11-25 20:21:53,138 INFO L226 Difference]: Without dead ends: 4826 [2021-11-25 20:21:53,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:21:53,142 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 2849 mSDsluCounter, 2529 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2849 SdHoareTripleChecker+Valid, 3243 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:53,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2849 Valid, 3243 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:21:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-25 20:21:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 2530. [2021-11-25 20:21:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2527 states have (on average 1.2853185595567866) internal successors, (3248), 2529 states have internal predecessors, (3248), 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 20:21:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3248 transitions. [2021-11-25 20:21:53,663 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3248 transitions. Word has length 55 [2021-11-25 20:21:53,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:53,664 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3248 transitions. [2021-11-25 20:21:53,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 20:21:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3248 transitions. [2021-11-25 20:21:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 20:21:53,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:53,667 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 20:21:53,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:21:53,668 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:21:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1102645022, now seen corresponding path program 1 times [2021-11-25 20:21:53,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:53,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972855820] [2021-11-25 20:21:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:53,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:53,723 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 20:21:53,723 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:53,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972855820] [2021-11-25 20:21:53,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972855820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:53,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:53,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:53,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632280506] [2021-11-25 20:21:53,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:53,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:53,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:53,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:53,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:53,726 INFO L87 Difference]: Start difference. First operand 2530 states and 3248 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 20:21:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:54,198 INFO L93 Difference]: Finished difference Result 4668 states and 6074 transitions. [2021-11-25 20:21:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:54,201 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 20:21:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:54,206 INFO L225 Difference]: With dead ends: 4668 [2021-11-25 20:21:54,206 INFO L226 Difference]: Without dead ends: 2531 [2021-11-25 20:21:54,208 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 20:21:54,209 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 428 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:54,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 591 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-11-25 20:21:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2232. [2021-11-25 20:21:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2230 states have (on average 1.2878923766816144) internal successors, (2872), 2231 states have internal predecessors, (2872), 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 20:21:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 2872 transitions. [2021-11-25 20:21:54,553 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 2872 transitions. Word has length 55 [2021-11-25 20:21:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:54,554 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 2872 transitions. [2021-11-25 20:21:54,554 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 20:21:54,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 2872 transitions. [2021-11-25 20:21:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:21:54,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:54,556 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] [2021-11-25 20:21:54,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:21:54,557 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-25 20:21:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash -130351128, now seen corresponding path program 1 times [2021-11-25 20:21:54,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:54,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782899445] [2021-11-25 20:21:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:54,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:54,646 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 20:21:54,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782899445] [2021-11-25 20:21:54,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782899445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:54,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:54,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:21:54,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267584972] [2021-11-25 20:21:54,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:54,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:54,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:54,650 INFO L87 Difference]: Start difference. First operand 2232 states and 2872 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 20:21:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:55,068 INFO L93 Difference]: Finished difference Result 3774 states and 4923 transitions. [2021-11-25 20:21:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:55,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 56 [2021-11-25 20:21:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:55,073 INFO L225 Difference]: With dead ends: 3774 [2021-11-25 20:21:55,074 INFO L226 Difference]: Without dead ends: 2009 [2021-11-25 20:21:55,077 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 20:21:55,078 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 486 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:55,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 677 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-11-25 20:21:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 2005. [2021-11-25 20:21:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2003 states have (on average 1.2785821268097852) internal successors, (2561), 2004 states have internal predecessors, (2561), 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 20:21:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 2561 transitions. [2021-11-25 20:21:55,408 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 2561 transitions. Word has length 56 [2021-11-25 20:21:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:55,409 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 2561 transitions. [2021-11-25 20:21:55,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 20:21:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 2561 transitions. [2021-11-25 20:21:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:21:55,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:55,411 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] [2021-11-25 20:21:55,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:21:55,412 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 20:21:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1266882465, now seen corresponding path program 1 times [2021-11-25 20:21:55,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:55,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447905737] [2021-11-25 20:21:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:55,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:55,796 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 20:21:55,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:55,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447905737] [2021-11-25 20:21:55,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447905737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:55,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:55,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 20:21:55,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143813600] [2021-11-25 20:21:55,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:55,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:21:55,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:21:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:21:55,799 INFO L87 Difference]: Start difference. First operand 2005 states and 2561 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 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 20:21:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:57,646 INFO L93 Difference]: Finished difference Result 3892 states and 4971 transitions. [2021-11-25 20:21:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:21:57,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 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 56 [2021-11-25 20:21:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:57,657 INFO L225 Difference]: With dead ends: 3892 [2021-11-25 20:21:57,657 INFO L226 Difference]: Without dead ends: 3888 [2021-11-25 20:21:57,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:21:57,660 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 2627 mSDsluCounter, 2911 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2627 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:57,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2627 Valid, 3428 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:21:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2021-11-25 20:21:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 2001. [2021-11-25 20:21:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 1.2785) internal successors, (2557), 2000 states have internal predecessors, (2557), 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 20:21:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2557 transitions. [2021-11-25 20:21:58,147 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2557 transitions. Word has length 56 [2021-11-25 20:21:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:58,147 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 2557 transitions. [2021-11-25 20:21:58,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 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 20:21:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2557 transitions. [2021-11-25 20:21:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 20:21:58,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:58,150 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 20:21:58,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:21:58,151 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 20:21:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1401164501, now seen corresponding path program 1 times [2021-11-25 20:21:58,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:58,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177837520] [2021-11-25 20:21:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:58,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:58,221 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 20:21:58,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:58,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177837520] [2021-11-25 20:21:58,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177837520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:58,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:58,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:58,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879262569] [2021-11-25 20:21:58,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:58,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:58,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:58,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:58,225 INFO L87 Difference]: Start difference. First operand 2001 states and 2557 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 20:21:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:58,855 INFO L93 Difference]: Finished difference Result 4453 states and 5829 transitions. [2021-11-25 20:21:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:58,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 20:21:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:58,861 INFO L225 Difference]: With dead ends: 4453 [2021-11-25 20:21:58,861 INFO L226 Difference]: Without dead ends: 3015 [2021-11-25 20:21:58,865 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 20:21:58,866 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 193 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:58,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 670 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2021-11-25 20:21:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2739. [2021-11-25 20:21:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 1.277209642074507) internal successors, (3497), 2738 states have internal predecessors, (3497), 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 20:21:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3497 transitions. [2021-11-25 20:21:59,469 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3497 transitions. Word has length 60 [2021-11-25 20:21:59,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:59,470 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 3497 transitions. [2021-11-25 20:21:59,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 20:21:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3497 transitions. [2021-11-25 20:21:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 20:21:59,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:59,478 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] [2021-11-25 20:21:59,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:21:59,479 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 20:21:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1469253499, now seen corresponding path program 1 times [2021-11-25 20:21:59,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:59,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358983859] [2021-11-25 20:21:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:59,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:59,644 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 20:21:59,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:59,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358983859] [2021-11-25 20:21:59,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358983859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:59,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:59,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:21:59,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391125092] [2021-11-25 20:21:59,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:59,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:21:59,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:21:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:21:59,647 INFO L87 Difference]: Start difference. First operand 2739 states and 3497 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 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 20:22:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:01,806 INFO L93 Difference]: Finished difference Result 6291 states and 7991 transitions. [2021-11-25 20:22:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:22:01,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 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 65 [2021-11-25 20:22:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:01,822 INFO L225 Difference]: With dead ends: 6291 [2021-11-25 20:22:01,822 INFO L226 Difference]: Without dead ends: 6289 [2021-11-25 20:22:01,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:22:01,825 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 1731 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:01,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1731 Valid, 2176 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:22:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-11-25 20:22:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 3328. [2021-11-25 20:22:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 1.272317403065825) internal successors, (4233), 3327 states have internal predecessors, (4233), 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 20:22:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4233 transitions. [2021-11-25 20:22:02,689 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4233 transitions. Word has length 65 [2021-11-25 20:22:02,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:02,690 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4233 transitions. [2021-11-25 20:22:02,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 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 20:22:02,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4233 transitions. [2021-11-25 20:22:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 20:22:02,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:02,693 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] [2021-11-25 20:22:02,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:22:02,693 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 20:22:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash 835374526, now seen corresponding path program 1 times [2021-11-25 20:22:02,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:02,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280317148] [2021-11-25 20:22:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:02,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:02,769 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 20:22:02,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:02,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280317148] [2021-11-25 20:22:02,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280317148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:02,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:02,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:02,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019189804] [2021-11-25 20:22:02,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:02,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:02,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:02,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:02,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:02,773 INFO L87 Difference]: Start difference. First operand 3328 states and 4233 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 20:22:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:03,979 INFO L93 Difference]: Finished difference Result 6482 states and 8411 transitions. [2021-11-25 20:22:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:03,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 65 [2021-11-25 20:22:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:03,993 INFO L225 Difference]: With dead ends: 6482 [2021-11-25 20:22:03,993 INFO L226 Difference]: Without dead ends: 4451 [2021-11-25 20:22:03,998 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 20:22:03,999 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 243 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:04,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 643 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:22:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-11-25 20:22:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 4155. [2021-11-25 20:22:05,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4155 states, 4154 states have (on average 1.2676937891189215) internal successors, (5266), 4154 states have internal predecessors, (5266), 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 20:22:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5266 transitions. [2021-11-25 20:22:05,055 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 5266 transitions. Word has length 65 [2021-11-25 20:22:05,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:05,056 INFO L470 AbstractCegarLoop]: Abstraction has 4155 states and 5266 transitions. [2021-11-25 20:22:05,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 20:22:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 5266 transitions. [2021-11-25 20:22:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:22:05,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:05,060 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 20:22:05,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:22:05,060 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 20:22:05,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:05,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1048433134, now seen corresponding path program 1 times [2021-11-25 20:22:05,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:05,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395589247] [2021-11-25 20:22:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:05,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:05,224 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 20:22:05,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:05,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395589247] [2021-11-25 20:22:05,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395589247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:05,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:05,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:22:05,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812013738] [2021-11-25 20:22:05,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:05,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:22:05,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:22:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:22:05,227 INFO L87 Difference]: Start difference. First operand 4155 states and 5266 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 20:22:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:07,312 INFO L93 Difference]: Finished difference Result 7278 states and 9224 transitions. [2021-11-25 20:22:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:22:07,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 20:22:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:07,324 INFO L225 Difference]: With dead ends: 7278 [2021-11-25 20:22:07,324 INFO L226 Difference]: Without dead ends: 7276 [2021-11-25 20:22:07,326 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 20:22:07,327 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 1385 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:07,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 2016 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:22:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-11-25 20:22:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 4478. [2021-11-25 20:22:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 1.2644628099173554) internal successors, (5661), 4477 states have internal predecessors, (5661), 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 20:22:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 5661 transitions. [2021-11-25 20:22:08,490 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 5661 transitions. Word has length 71 [2021-11-25 20:22:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:08,491 INFO L470 AbstractCegarLoop]: Abstraction has 4478 states and 5661 transitions. [2021-11-25 20:22:08,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 20:22:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 5661 transitions. [2021-11-25 20:22:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:22:08,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:08,496 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, 1, 1, 1, 1] [2021-11-25 20:22:08,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:22:08,496 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 20:22:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1409043330, now seen corresponding path program 1 times [2021-11-25 20:22:08,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:08,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056968136] [2021-11-25 20:22:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:08,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:08,652 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 20:22:08,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:08,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056968136] [2021-11-25 20:22:08,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056968136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:08,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:08,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:22:08,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307155623] [2021-11-25 20:22:08,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:08,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:22:08,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:22:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:22:08,655 INFO L87 Difference]: Start difference. First operand 4478 states and 5661 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 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 20:22:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:10,699 INFO L93 Difference]: Finished difference Result 7351 states and 9313 transitions. [2021-11-25 20:22:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:22:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 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 75 [2021-11-25 20:22:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:10,708 INFO L225 Difference]: With dead ends: 7351 [2021-11-25 20:22:10,708 INFO L226 Difference]: Without dead ends: 7349 [2021-11-25 20:22:10,710 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 20:22:10,711 INFO L933 BasicCegarLoop]: 523 mSDtfsCounter, 1392 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:10,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1392 Valid, 2294 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:22:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-11-25 20:22:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 4825. [2021-11-25 20:22:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 1.2624378109452736) internal successors, (6090), 4824 states have internal predecessors, (6090), 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 20:22:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 6090 transitions. [2021-11-25 20:22:12,046 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 6090 transitions. Word has length 75 [2021-11-25 20:22:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:12,046 INFO L470 AbstractCegarLoop]: Abstraction has 4825 states and 6090 transitions. [2021-11-25 20:22:12,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 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 20:22:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 6090 transitions. [2021-11-25 20:22:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:22:12,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:12,052 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, 1, 1, 1, 1] [2021-11-25 20:22:12,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:22:12,052 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 20:22:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:12,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2071996820, now seen corresponding path program 1 times [2021-11-25 20:22:12,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:12,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140154118] [2021-11-25 20:22:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:12,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:12,210 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 20:22:12,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:12,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140154118] [2021-11-25 20:22:12,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140154118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:12,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:12,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:22:12,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820648086] [2021-11-25 20:22:12,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:12,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:22:12,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:12,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:22:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:22:12,213 INFO L87 Difference]: Start difference. First operand 4825 states and 6090 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 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 20:22:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:14,397 INFO L93 Difference]: Finished difference Result 7410 states and 9415 transitions. [2021-11-25 20:22:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:22:14,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 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 75 [2021-11-25 20:22:14,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:14,406 INFO L225 Difference]: With dead ends: 7410 [2021-11-25 20:22:14,406 INFO L226 Difference]: Without dead ends: 7408 [2021-11-25 20:22:14,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:22:14,409 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 1390 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:14,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1390 Valid, 2574 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:22:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7408 states. [2021-11-25 20:22:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7408 to 4789. [2021-11-25 20:22:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4789 states, 4788 states have (on average 1.2627401837928154) internal successors, (6046), 4788 states have internal predecessors, (6046), 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 20:22:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 6046 transitions. [2021-11-25 20:22:15,593 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 6046 transitions. Word has length 75 [2021-11-25 20:22:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:15,593 INFO L470 AbstractCegarLoop]: Abstraction has 4789 states and 6046 transitions. [2021-11-25 20:22:15,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 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 20:22:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 6046 transitions. [2021-11-25 20:22:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:22:15,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:15,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:15,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 20:22:15,599 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 20:22:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2066736926, now seen corresponding path program 1 times [2021-11-25 20:22:15,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:15,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583968000] [2021-11-25 20:22:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:15,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:16,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583968000] [2021-11-25 20:22:16,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583968000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417095834] [2021-11-25 20:22:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:16,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:16,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:16,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:16,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:22:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:16,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 20:22:16,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:22:17,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:22:17,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417095834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:17,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:22:17,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 22 [2021-11-25 20:22:17,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107103717] [2021-11-25 20:22:17,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:17,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:22:17,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:22:17,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:22:17,114 INFO L87 Difference]: Start difference. First operand 4789 states and 6046 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 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 20:22:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:19,887 INFO L93 Difference]: Finished difference Result 8122 states and 10274 transitions. [2021-11-25 20:22:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:22:19,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 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 77 [2021-11-25 20:22:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:19,896 INFO L225 Difference]: With dead ends: 8122 [2021-11-25 20:22:19,897 INFO L226 Difference]: Without dead ends: 6293 [2021-11-25 20:22:19,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:22:19,902 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 1713 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:19,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 1014 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:22:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2021-11-25 20:22:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 4772. [2021-11-25 20:22:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4772 states, 4771 states have (on average 1.2634667784531546) internal successors, (6028), 4771 states have internal predecessors, (6028), 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 20:22:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 6028 transitions. [2021-11-25 20:22:21,339 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 6028 transitions. Word has length 77 [2021-11-25 20:22:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:21,339 INFO L470 AbstractCegarLoop]: Abstraction has 4772 states and 6028 transitions. [2021-11-25 20:22:21,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 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 20:22:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 6028 transitions. [2021-11-25 20:22:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:22:21,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:21,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:21,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 20:22:21,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 20:22:21,561 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 20:22:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash -175558868, now seen corresponding path program 1 times [2021-11-25 20:22:21,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:21,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805114971] [2021-11-25 20:22:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:21,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:22:21,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:21,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805114971] [2021-11-25 20:22:21,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805114971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:21,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:21,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:22:21,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787082927] [2021-11-25 20:22:21,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:21,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:22:21,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:21,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:22:21,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:22:21,720 INFO L87 Difference]: Start difference. First operand 4772 states and 6028 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 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 20:22:23,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:23,953 INFO L93 Difference]: Finished difference Result 7642 states and 9673 transitions. [2021-11-25 20:22:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:22:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 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 77 [2021-11-25 20:22:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:23,962 INFO L225 Difference]: With dead ends: 7642 [2021-11-25 20:22:23,962 INFO L226 Difference]: Without dead ends: 5810 [2021-11-25 20:22:23,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:22:23,966 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 1046 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:23,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 841 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:22:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2021-11-25 20:22:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 4537. [2021-11-25 20:22:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4536 states have (on average 1.26168430335097) internal successors, (5723), 4536 states have internal predecessors, (5723), 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 20:22:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 5723 transitions. [2021-11-25 20:22:25,159 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 5723 transitions. Word has length 77 [2021-11-25 20:22:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:25,159 INFO L470 AbstractCegarLoop]: Abstraction has 4537 states and 5723 transitions. [2021-11-25 20:22:25,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 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 20:22:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 5723 transitions. [2021-11-25 20:22:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:22:25,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:25,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:25,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 20:22:25,163 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 20:22:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash -262712424, now seen corresponding path program 1 times [2021-11-25 20:22:25,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:25,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732483940] [2021-11-25 20:22:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:25,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:25,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:25,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732483940] [2021-11-25 20:22:25,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732483940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:25,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869629877] [2021-11-25 20:22:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:25,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:25,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:25,631 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:25,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:22:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 20:22:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:31,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:49,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869629877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:49,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67049531] [2021-11-25 20:22:49,163 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2021-11-25 20:22:49,164 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:22:49,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:22:49,176 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:22:49,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:49,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:49,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:49,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 20:22:49,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,807 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 20:23:02,606 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:25:38,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [67049531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:25:38,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:25:38,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [16, 24, 24] total 104 [2021-11-25 20:25:38,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159379518] [2021-11-25 20:25:38,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:25:38,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 20:25:38,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:25:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 20:25:38,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1926, Invalid=8786, Unknown=0, NotChecked=0, Total=10712 [2021-11-25 20:25:38,863 INFO L87 Difference]: Start difference. First operand 4537 states and 5723 transitions. Second operand has 46 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 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 20:26:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:26:21,481 INFO L93 Difference]: Finished difference Result 6468 states and 8211 transitions. [2021-11-25 20:26:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-25 20:26:21,482 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 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 78 [2021-11-25 20:26:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:26:21,487 INFO L225 Difference]: With dead ends: 6468 [2021-11-25 20:26:21,487 INFO L226 Difference]: Without dead ends: 4542 [2021-11-25 20:26:21,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 136 SyntacticMatches, 11 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5789 ImplicationChecksByTransitivity, 160.1s TimeCoverageRelationStatistics Valid=1926, Invalid=8786, Unknown=0, NotChecked=0, Total=10712 [2021-11-25 20:26:21,497 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 55 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 12006 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 12013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:26:21,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 736 Invalid, 12013 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 12006 Invalid, 0 Unknown, 0 Unchecked, 41.3s Time] [2021-11-25 20:26:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2021-11-25 20:26:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 4541. [2021-11-25 20:26:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4541 states, 4540 states have (on average 1.261453744493392) internal successors, (5727), 4540 states have internal predecessors, (5727), 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 20:26:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 5727 transitions. [2021-11-25 20:26:22,750 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 5727 transitions. Word has length 78 [2021-11-25 20:26:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:26:22,751 INFO L470 AbstractCegarLoop]: Abstraction has 4541 states and 5727 transitions. [2021-11-25 20:26:22,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 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 20:26:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 5727 transitions. [2021-11-25 20:26:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:26:22,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:26:22,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:26:22,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:26:22,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 20:26:22,981 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 20:26:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:26:22,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1477843576, now seen corresponding path program 1 times [2021-11-25 20:26:22,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:26:22,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036873622] [2021-11-25 20:26:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:22,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:26:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:26:23,508 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:26:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036873622] [2021-11-25 20:26:23,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036873622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:26:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765254045] [2021-11-25 20:26:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:23,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:26:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:26:23,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:26:23,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a37a4b-3519-4586-836b-6dddc8773df0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:26:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-25 20:26:23,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:26:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:26:25,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:26:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:26:32,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765254045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:26:32,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635545650] [2021-11-25 20:26:32,125 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2021-11-25 20:26:32,125 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:26:32,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:26:32,126 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:26:32,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:26:32,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:26:32,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:26:32,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:26:32,405 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 20:26:32,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:26:32,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:26:32,442 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 20:28:43,424 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:28:51,176 WARN L227 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 727 DAG size of output: 463 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:30:46,755 WARN L227 SmtUtils]: Spent 9.61s on a formula simplification. DAG size of input: 694 DAG size of output: 517 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:30:57,374 WARN L227 SmtUtils]: Spent 9.70s on a formula simplification. DAG size of input: 698 DAG size of output: 521 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:31:08,135 WARN L227 SmtUtils]: Spent 9.80s on a formula simplification. DAG size of input: 701 DAG size of output: 524 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:31:19,110 WARN L227 SmtUtils]: Spent 9.99s on a formula simplification. DAG size of input: 705 DAG size of output: 528 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:31:31,397 WARN L227 SmtUtils]: Spent 10.23s on a formula simplification. DAG size of input: 710 DAG size of output: 529 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:31:42,736 WARN L227 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 712 DAG size of output: 533 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:31:51,197 WARN L227 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 695 DAG size of output: 442 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:32:00,863 WARN L227 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 695 DAG size of output: 442 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:32:11,046 WARN L227 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 716 DAG size of output: 463 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:32:21,407 WARN L227 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 724 DAG size of output: 471 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:32:31,961 WARN L227 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 731 DAG size of output: 465 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:32:42,184 WARN L227 SmtUtils]: Spent 8.90s on a formula simplification. DAG size of input: 735 DAG size of output: 469 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:32:50,764 WARN L227 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 772 DAG size of output: 519 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:32:59,757 WARN L227 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 772 DAG size of output: 519 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)