./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/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_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V --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 0.2.1-dev-aef121e [2021-11-23 01:59:07,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:59:07,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:59:08,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:59:08,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:59:08,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:59:08,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:59:08,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:59:08,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:59:08,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:59:08,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:59:08,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:59:08,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:59:08,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:59:08,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:59:08,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:59:08,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:59:08,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:59:08,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:59:08,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:59:08,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:59:08,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:59:08,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:59:08,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:59:08,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:59:08,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:59:08,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:59:08,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:59:08,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:59:08,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:59:08,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:59:08,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:59:08,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:59:08,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:59:08,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:59:08,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:59:08,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:59:08,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:59:08,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:59:08,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:59:08,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:59:08,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:59:08,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:59:08,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:59:08,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:59:08,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:59:08,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:59:08,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:59:08,219 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:59:08,219 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:59:08,219 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:59:08,219 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:59:08,221 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:59:08,221 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:59:08,221 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:59:08,222 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:59:08,222 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:59:08,222 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:59:08,222 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:59:08,223 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:59:08,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:59:08,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:59:08,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:59:08,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:59:08,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:59:08,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:59:08,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:59:08,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:59:08,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:59:08,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:59:08,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:59:08,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:59:08,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:59:08,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:59:08,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:59:08,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:59:08,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:59:08,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:59:08,230 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:59:08,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:59:08,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:59:08,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:59:08,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:59:08,231 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_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72aca9735a0330ad4ed4e9de4f21904354ce62c742d488d0b09ce6da875c2798 [2021-11-23 01:59:08,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:59:08,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:59:08,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:59:08,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:59:08,614 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:59:08,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-23 01:59:08,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/data/ce8e0f187/f0b21ec3f91745579852a5dc36fea619/FLAG57ffdc65c [2021-11-23 01:59:09,558 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:59:09,558 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-23 01:59:09,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/data/ce8e0f187/f0b21ec3f91745579852a5dc36fea619/FLAG57ffdc65c [2021-11-23 01:59:09,654 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/data/ce8e0f187/f0b21ec3f91745579852a5dc36fea619 [2021-11-23 01:59:09,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:59:09,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:59:09,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:59:09,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:59:09,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:59:09,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:59:09" (1/1) ... [2021-11-23 01:59:09,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a5004d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:09, skipping insertion in model container [2021-11-23 01:59:09,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:59:09" (1/1) ... [2021-11-23 01:59:09,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:59:09,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:59:10,158 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8448,8461] [2021-11-23 01:59:10,216 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12616,12629] [2021-11-23 01:59:10,275 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20366,20379] [2021-11-23 01:59:10,316 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27098,27111] [2021-11-23 01:59:10,420 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[47963,47976] [2021-11-23 01:59:10,576 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[73065,73078] [2021-11-23 01:59:10,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:59:10,887 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:59:10,935 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8448,8461] [2021-11-23 01:59:10,957 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12616,12629] [2021-11-23 01:59:10,993 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20366,20379] [2021-11-23 01:59:11,010 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27098,27111] [2021-11-23 01:59:11,063 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[47963,47976] [2021-11-23 01:59:11,137 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_fbdde506-96f6-4875-9071-710fefb5c53e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[73065,73078] [2021-11-23 01:59:11,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:59:11,299 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:59:11,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11 WrapperNode [2021-11-23 01:59:11,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:59:11,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:59:11,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:59:11,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:59:11,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,526 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5697 [2021-11-23 01:59:11,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:59:11,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:59:11,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:59:11,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:59:11,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:59:11,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:59:11,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:59:11,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:59:11,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (1/1) ... [2021-11-23 01:59:11,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:59:11,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:11,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:59:11,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:59:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:59:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:59:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:59:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:59:12,126 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:59:12,128 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:59:14,955 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:59:15,499 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:59:15,499 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 01:59:15,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:59:15 BoogieIcfgContainer [2021-11-23 01:59:15,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:59:15,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:59:15,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:59:15,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:59:15,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:59:09" (1/3) ... [2021-11-23 01:59:15,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaa648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:59:15, skipping insertion in model container [2021-11-23 01:59:15,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:11" (2/3) ... [2021-11-23 01:59:15,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaa648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:59:15, skipping insertion in model container [2021-11-23 01:59:15,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:59:15" (3/3) ... [2021-11-23 01:59:15,520 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-23 01:59:15,528 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:59:15,529 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-23 01:59:15,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:59:15,612 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 [2021-11-23 01:59:15,612 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-23 01:59:15,663 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) [2021-11-23 01:59:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 01:59:15,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:15,717 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] [2021-11-23 01:59:15,718 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)] === [2021-11-23 01:59:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:15,725 INFO L85 PathProgramCache]: Analyzing trace with hash 440971975, now seen corresponding path program 1 times [2021-11-23 01:59:15,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:15,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777053971] [2021-11-23 01:59:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:15,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:16,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:16,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777053971] [2021-11-23 01:59:16,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777053971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:16,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:16,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:59:16,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830720210] [2021-11-23 01:59:16,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:16,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:59:16,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:16,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:59:16,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:59:16,387 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) [2021-11-23 01:59:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:18,057 INFO L93 Difference]: Finished difference Result 2051 states and 3535 transitions. [2021-11-23 01:59:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:59:18,060 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 [2021-11-23 01:59:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:18,084 INFO L225 Difference]: With dead ends: 2051 [2021-11-23 01:59:18,084 INFO L226 Difference]: Without dead ends: 1335 [2021-11-23 01:59:18,092 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 [2021-11-23 01:59:18,096 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, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:18,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6254 Valid, 1399 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 01:59:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-11-23 01:59:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1321. [2021-11-23 01:59:18,256 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) [2021-11-23 01:59:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1661 transitions. [2021-11-23 01:59:18,263 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1661 transitions. Word has length 51 [2021-11-23 01:59:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:18,264 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1661 transitions. [2021-11-23 01:59:18,265 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) [2021-11-23 01:59:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1661 transitions. [2021-11-23 01:59:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 01:59:18,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:18,269 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] [2021-11-23 01:59:18,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:59:18,270 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)] === [2021-11-23 01:59:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash -230979491, now seen corresponding path program 1 times [2021-11-23 01:59:18,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:18,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328787104] [2021-11-23 01:59:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:18,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:18,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328787104] [2021-11-23 01:59:18,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328787104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:18,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:18,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:59:18,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673658868] [2021-11-23 01:59:18,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:18,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:59:18,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:18,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:59:18,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:59:18,444 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) [2021-11-23 01:59:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:19,503 INFO L93 Difference]: Finished difference Result 2410 states and 3059 transitions. [2021-11-23 01:59:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:59:19,505 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 [2021-11-23 01:59:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:19,521 INFO L225 Difference]: With dead ends: 2410 [2021-11-23 01:59:19,521 INFO L226 Difference]: Without dead ends: 1629 [2021-11-23 01:59:19,528 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 [2021-11-23 01:59:19,530 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 3942 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:19,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3942 Valid, 791 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 01:59:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-11-23 01:59:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1619. [2021-11-23 01:59:19,634 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) [2021-11-23 01:59:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 2043 transitions. [2021-11-23 01:59:19,648 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 2043 transitions. Word has length 51 [2021-11-23 01:59:19,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:19,649 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 2043 transitions. [2021-11-23 01:59:19,649 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) [2021-11-23 01:59:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 2043 transitions. [2021-11-23 01:59:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 01:59:19,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:19,654 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] [2021-11-23 01:59:19,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:59:19,655 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)] === [2021-11-23 01:59:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1941934323, now seen corresponding path program 1 times [2021-11-23 01:59:19,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:19,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200933892] [2021-11-23 01:59:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:19,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:19,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:19,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200933892] [2021-11-23 01:59:19,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200933892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:19,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:19,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:59:19,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174605200] [2021-11-23 01:59:19,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:19,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:59:19,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:19,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:59:19,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:59:19,829 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) [2021-11-23 01:59:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:20,827 INFO L93 Difference]: Finished difference Result 3140 states and 3984 transitions. [2021-11-23 01:59:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:59:20,828 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 [2021-11-23 01:59:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:20,842 INFO L225 Difference]: With dead ends: 3140 [2021-11-23 01:59:20,842 INFO L226 Difference]: Without dead ends: 2338 [2021-11-23 01:59:20,846 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 [2021-11-23 01:59:20,850 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 3560 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:20,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3560 Valid, 765 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 01:59:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-11-23 01:59:20,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 2332. [2021-11-23 01:59:20,992 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) [2021-11-23 01:59:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2912 transitions. [2021-11-23 01:59:21,003 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2912 transitions. Word has length 51 [2021-11-23 01:59:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:21,003 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 2912 transitions. [2021-11-23 01:59:21,004 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) [2021-11-23 01:59:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2912 transitions. [2021-11-23 01:59:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 01:59:21,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:21,009 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] [2021-11-23 01:59:21,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:59:21,009 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)] === [2021-11-23 01:59:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -274476207, now seen corresponding path program 1 times [2021-11-23 01:59:21,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:21,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048354640] [2021-11-23 01:59:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:21,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:21,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:21,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048354640] [2021-11-23 01:59:21,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048354640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:21,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:21,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 01:59:21,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221168476] [2021-11-23 01:59:21,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:21,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:59:21,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:21,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:59:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:59:21,239 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) [2021-11-23 01:59:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:23,279 INFO L93 Difference]: Finished difference Result 4239 states and 5441 transitions. [2021-11-23 01:59:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 01:59:23,279 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 [2021-11-23 01:59:23,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:23,304 INFO L225 Difference]: With dead ends: 4239 [2021-11-23 01:59:23,304 INFO L226 Difference]: Without dead ends: 3875 [2021-11-23 01:59:23,308 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 [2021-11-23 01:59:23,317 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 3948 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:23,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3948 Valid, 2532 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 01:59:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-11-23 01:59:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2332. [2021-11-23 01:59:23,579 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) [2021-11-23 01:59:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2911 transitions. [2021-11-23 01:59:23,592 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2911 transitions. Word has length 53 [2021-11-23 01:59:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:23,592 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 2911 transitions. [2021-11-23 01:59:23,593 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) [2021-11-23 01:59:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2911 transitions. [2021-11-23 01:59:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 01:59:23,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:23,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:23,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:59:23,599 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)] === [2021-11-23 01:59:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash -603870735, now seen corresponding path program 1 times [2021-11-23 01:59:23,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:23,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819081866] [2021-11-23 01:59:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:23,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:23,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819081866] [2021-11-23 01:59:23,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819081866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:23,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:23,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 01:59:23,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847911465] [2021-11-23 01:59:23,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:23,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:59:23,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:23,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:59:23,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:59:23,825 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) [2021-11-23 01:59:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:26,094 INFO L93 Difference]: Finished difference Result 3775 states and 4807 transitions. [2021-11-23 01:59:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 01:59:26,094 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 [2021-11-23 01:59:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:26,117 INFO L225 Difference]: With dead ends: 3775 [2021-11-23 01:59:26,118 INFO L226 Difference]: Without dead ends: 3769 [2021-11-23 01:59:26,119 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 [2021-11-23 01:59:26,120 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 2994 mSDsluCounter, 2374 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:26,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2994 Valid, 2983 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 01:59:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-11-23 01:59:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 2332. [2021-11-23 01:59:26,332 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) [2021-11-23 01:59:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2910 transitions. [2021-11-23 01:59:26,342 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2910 transitions. Word has length 53 [2021-11-23 01:59:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:26,344 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 2910 transitions. [2021-11-23 01:59:26,345 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) [2021-11-23 01:59:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2910 transitions. [2021-11-23 01:59:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 01:59:26,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:26,348 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] [2021-11-23 01:59:26,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 01:59:26,349 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)] === [2021-11-23 01:59:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1273862225, now seen corresponding path program 1 times [2021-11-23 01:59:26,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:26,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572245071] [2021-11-23 01:59:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:26,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:26,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:26,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572245071] [2021-11-23 01:59:26,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572245071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:26,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:26,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:59:26,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541035285] [2021-11-23 01:59:26,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:26,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:59:26,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:59:26,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:59:26,496 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) [2021-11-23 01:59:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:27,867 INFO L93 Difference]: Finished difference Result 3883 states and 4973 transitions. [2021-11-23 01:59:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:59:27,868 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 [2021-11-23 01:59:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:27,887 INFO L225 Difference]: With dead ends: 3883 [2021-11-23 01:59:27,887 INFO L226 Difference]: Without dead ends: 3375 [2021-11-23 01:59:27,889 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 [2021-11-23 01:59:27,890 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 3702 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:27,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3702 Valid, 1675 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 01:59:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-11-23 01:59:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2332. [2021-11-23 01:59:28,059 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) [2021-11-23 01:59:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2909 transitions. [2021-11-23 01:59:28,064 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2909 transitions. Word has length 53 [2021-11-23 01:59:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:28,065 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 2909 transitions. [2021-11-23 01:59:28,065 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) [2021-11-23 01:59:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2909 transitions. [2021-11-23 01:59:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 01:59:28,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:28,069 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] [2021-11-23 01:59:28,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 01:59:28,069 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)] === [2021-11-23 01:59:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash -843774436, now seen corresponding path program 1 times [2021-11-23 01:59:28,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:28,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058961364] [2021-11-23 01:59:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:28,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:28,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:28,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058961364] [2021-11-23 01:59:28,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058961364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:28,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:28,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:28,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173680148] [2021-11-23 01:59:28,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:28,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:28,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:28,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:28,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:28,133 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) [2021-11-23 01:59:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:28,455 INFO L93 Difference]: Finished difference Result 3200 states and 4082 transitions. [2021-11-23 01:59:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:28,456 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 [2021-11-23 01:59:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:28,467 INFO L225 Difference]: With dead ends: 3200 [2021-11-23 01:59:28,467 INFO L226 Difference]: Without dead ends: 2033 [2021-11-23 01:59:28,469 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 [2021-11-23 01:59:28,470 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 [2021-11-23 01:59:28,470 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] [2021-11-23 01:59:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-11-23 01:59:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2031. [2021-11-23 01:59:28,685 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) [2021-11-23 01:59:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2495 transitions. [2021-11-23 01:59:28,692 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2495 transitions. Word has length 54 [2021-11-23 01:59:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:28,693 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 2495 transitions. [2021-11-23 01:59:28,694 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) [2021-11-23 01:59:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2495 transitions. [2021-11-23 01:59:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 01:59:28,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:28,698 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] [2021-11-23 01:59:28,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 01:59:28,698 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)] === [2021-11-23 01:59:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:28,700 INFO L85 PathProgramCache]: Analyzing trace with hash 586810076, now seen corresponding path program 1 times [2021-11-23 01:59:28,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:28,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854024636] [2021-11-23 01:59:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:28,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:28,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854024636] [2021-11-23 01:59:28,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854024636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:28,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:28,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:28,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053535319] [2021-11-23 01:59:28,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:28,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:28,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:28,774 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) [2021-11-23 01:59:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:29,178 INFO L93 Difference]: Finished difference Result 3121 states and 4006 transitions. [2021-11-23 01:59:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:29,179 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 [2021-11-23 01:59:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:29,192 INFO L225 Difference]: With dead ends: 3121 [2021-11-23 01:59:29,192 INFO L226 Difference]: Without dead ends: 2316 [2021-11-23 01:59:29,194 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 [2021-11-23 01:59:29,195 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 [2021-11-23 01:59:29,195 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] [2021-11-23 01:59:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-11-23 01:59:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2314. [2021-11-23 01:59:29,487 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) [2021-11-23 01:59:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2910 transitions. [2021-11-23 01:59:29,495 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2910 transitions. Word has length 54 [2021-11-23 01:59:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:29,497 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 2910 transitions. [2021-11-23 01:59:29,497 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) [2021-11-23 01:59:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2910 transitions. [2021-11-23 01:59:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 01:59:29,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:29,500 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] [2021-11-23 01:59:29,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 01:59:29,500 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)] === [2021-11-23 01:59:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash -117726025, now seen corresponding path program 1 times [2021-11-23 01:59:29,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:29,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831598751] [2021-11-23 01:59:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:29,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:29,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:29,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831598751] [2021-11-23 01:59:29,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831598751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:29,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:29,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:29,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124620474] [2021-11-23 01:59:29,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:29,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:29,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:29,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:29,570 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) [2021-11-23 01:59:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:30,065 INFO L93 Difference]: Finished difference Result 4188 states and 5469 transitions. [2021-11-23 01:59:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:30,066 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 [2021-11-23 01:59:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:30,085 INFO L225 Difference]: With dead ends: 4188 [2021-11-23 01:59:30,086 INFO L226 Difference]: Without dead ends: 2957 [2021-11-23 01:59:30,089 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 [2021-11-23 01:59:30,092 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 383 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2021-11-23 01:59:30,093 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] [2021-11-23 01:59:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2021-11-23 01:59:30,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2955. [2021-11-23 01:59:30,504 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) [2021-11-23 01:59:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3765 transitions. [2021-11-23 01:59:30,513 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3765 transitions. Word has length 54 [2021-11-23 01:59:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:30,513 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 3765 transitions. [2021-11-23 01:59:30,513 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) [2021-11-23 01:59:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3765 transitions. [2021-11-23 01:59:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 01:59:30,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:30,516 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] [2021-11-23 01:59:30,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 01:59:30,516 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)] === [2021-11-23 01:59:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:30,517 INFO L85 PathProgramCache]: Analyzing trace with hash -812769836, now seen corresponding path program 1 times [2021-11-23 01:59:30,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:30,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647677225] [2021-11-23 01:59:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:30,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:30,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:30,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647677225] [2021-11-23 01:59:30,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647677225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:30,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:30,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:30,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987749141] [2021-11-23 01:59:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:30,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:30,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:30,567 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) [2021-11-23 01:59:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:31,210 INFO L93 Difference]: Finished difference Result 5610 states and 7233 transitions. [2021-11-23 01:59:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:31,211 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 [2021-11-23 01:59:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:31,229 INFO L225 Difference]: With dead ends: 5610 [2021-11-23 01:59:31,229 INFO L226 Difference]: Without dead ends: 3205 [2021-11-23 01:59:31,234 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 [2021-11-23 01:59:31,235 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 [2021-11-23 01:59:31,235 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] [2021-11-23 01:59:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-11-23 01:59:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2576. [2021-11-23 01:59:31,671 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) [2021-11-23 01:59:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 3302 transitions. [2021-11-23 01:59:31,679 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 3302 transitions. Word has length 55 [2021-11-23 01:59:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:31,679 INFO L470 AbstractCegarLoop]: Abstraction has 2576 states and 3302 transitions. [2021-11-23 01:59:31,679 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) [2021-11-23 01:59:31,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 3302 transitions. [2021-11-23 01:59:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 01:59:31,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:31,681 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] [2021-11-23 01:59:31,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 01:59:31,682 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)] === [2021-11-23 01:59:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:31,683 INFO L85 PathProgramCache]: Analyzing trace with hash 930333266, now seen corresponding path program 1 times [2021-11-23 01:59:31,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:31,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801314770] [2021-11-23 01:59:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:31,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:32,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:32,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801314770] [2021-11-23 01:59:32,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801314770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:32,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:32,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 01:59:32,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575498192] [2021-11-23 01:59:32,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:32,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 01:59:32,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 01:59:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:59:32,033 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) [2021-11-23 01:59:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:33,714 INFO L93 Difference]: Finished difference Result 5114 states and 6543 transitions. [2021-11-23 01:59:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 01:59:33,715 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 [2021-11-23 01:59:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:33,727 INFO L225 Difference]: With dead ends: 5114 [2021-11-23 01:59:33,727 INFO L226 Difference]: Without dead ends: 4826 [2021-11-23 01:59:33,729 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 [2021-11-23 01:59:33,730 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 2849 mSDsluCounter, 2529 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2021-11-23 01:59:33,730 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] [2021-11-23 01:59:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-23 01:59:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 2530. [2021-11-23 01:59:34,275 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) [2021-11-23 01:59:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3248 transitions. [2021-11-23 01:59:34,280 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3248 transitions. Word has length 55 [2021-11-23 01:59:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:34,280 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3248 transitions. [2021-11-23 01:59:34,281 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) [2021-11-23 01:59:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3248 transitions. [2021-11-23 01:59:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 01:59:34,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:34,283 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] [2021-11-23 01:59:34,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 01:59:34,283 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)] === [2021-11-23 01:59:34,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1102645022, now seen corresponding path program 1 times [2021-11-23 01:59:34,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:34,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071372776] [2021-11-23 01:59:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:34,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:34,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:34,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071372776] [2021-11-23 01:59:34,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071372776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:34,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:34,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:34,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273721891] [2021-11-23 01:59:34,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:34,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:34,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:34,330 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) [2021-11-23 01:59:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:34,758 INFO L93 Difference]: Finished difference Result 4668 states and 6074 transitions. [2021-11-23 01:59:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:34,759 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 [2021-11-23 01:59:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:34,764 INFO L225 Difference]: With dead ends: 4668 [2021-11-23 01:59:34,765 INFO L226 Difference]: Without dead ends: 2531 [2021-11-23 01:59:34,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:34,769 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 428 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2021-11-23 01:59:34,770 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] [2021-11-23 01:59:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-11-23 01:59:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2232. [2021-11-23 01:59:35,054 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) [2021-11-23 01:59:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 2872 transitions. [2021-11-23 01:59:35,059 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 2872 transitions. Word has length 55 [2021-11-23 01:59:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:35,059 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 2872 transitions. [2021-11-23 01:59:35,059 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) [2021-11-23 01:59:35,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 2872 transitions. [2021-11-23 01:59:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 01:59:35,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:35,061 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] [2021-11-23 01:59:35,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 01:59:35,062 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)] === [2021-11-23 01:59:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:35,062 INFO L85 PathProgramCache]: Analyzing trace with hash -130351128, now seen corresponding path program 1 times [2021-11-23 01:59:35,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551376462] [2021-11-23 01:59:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:35,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:35,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:35,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551376462] [2021-11-23 01:59:35,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551376462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:35,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:35,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:59:35,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815741432] [2021-11-23 01:59:35,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:35,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:59:35,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:35,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:59:35,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:59:35,152 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) [2021-11-23 01:59:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:35,670 INFO L93 Difference]: Finished difference Result 3774 states and 4923 transitions. [2021-11-23 01:59:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:59:35,671 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 [2021-11-23 01:59:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:35,675 INFO L225 Difference]: With dead ends: 3774 [2021-11-23 01:59:35,675 INFO L226 Difference]: Without dead ends: 2009 [2021-11-23 01:59:35,677 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 [2021-11-23 01:59:35,678 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 [2021-11-23 01:59:35,678 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] [2021-11-23 01:59:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-11-23 01:59:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 2005. [2021-11-23 01:59:36,012 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) [2021-11-23 01:59:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 2561 transitions. [2021-11-23 01:59:36,016 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 2561 transitions. Word has length 56 [2021-11-23 01:59:36,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:36,016 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 2561 transitions. [2021-11-23 01:59:36,016 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) [2021-11-23 01:59:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 2561 transitions. [2021-11-23 01:59:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 01:59:36,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:36,018 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] [2021-11-23 01:59:36,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 01:59:36,019 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)] === [2021-11-23 01:59:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:36,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1266882465, now seen corresponding path program 1 times [2021-11-23 01:59:36,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:36,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101008976] [2021-11-23 01:59:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:36,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:36,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:36,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101008976] [2021-11-23 01:59:36,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101008976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:36,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:36,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 01:59:36,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557824044] [2021-11-23 01:59:36,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:36,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 01:59:36,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:36,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 01:59:36,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-23 01:59:36,342 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) [2021-11-23 01:59:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:38,026 INFO L93 Difference]: Finished difference Result 3892 states and 4971 transitions. [2021-11-23 01:59:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 01:59:38,027 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 [2021-11-23 01:59:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:38,033 INFO L225 Difference]: With dead ends: 3892 [2021-11-23 01:59:38,034 INFO L226 Difference]: Without dead ends: 3888 [2021-11-23 01:59:38,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-23 01:59:38,036 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, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:38,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2627 Valid, 3428 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 01:59:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2021-11-23 01:59:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 2001. [2021-11-23 01:59:38,578 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) [2021-11-23 01:59:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2557 transitions. [2021-11-23 01:59:38,582 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2557 transitions. Word has length 56 [2021-11-23 01:59:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:38,583 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 2557 transitions. [2021-11-23 01:59:38,583 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) [2021-11-23 01:59:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2557 transitions. [2021-11-23 01:59:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 01:59:38,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:38,588 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] [2021-11-23 01:59:38,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 01:59:38,588 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)] === [2021-11-23 01:59:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1401164501, now seen corresponding path program 1 times [2021-11-23 01:59:38,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:38,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621647855] [2021-11-23 01:59:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:38,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:38,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:38,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621647855] [2021-11-23 01:59:38,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621647855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:38,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:38,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:38,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672406458] [2021-11-23 01:59:38,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:38,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:38,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:38,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:38,662 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) [2021-11-23 01:59:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:39,490 INFO L93 Difference]: Finished difference Result 4453 states and 5829 transitions. [2021-11-23 01:59:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:39,491 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 [2021-11-23 01:59:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:39,497 INFO L225 Difference]: With dead ends: 4453 [2021-11-23 01:59:39,498 INFO L226 Difference]: Without dead ends: 3015 [2021-11-23 01:59:39,502 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 [2021-11-23 01:59:39,504 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 [2021-11-23 01:59:39,504 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] [2021-11-23 01:59:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2021-11-23 01:59:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2739. [2021-11-23 01:59:40,162 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) [2021-11-23 01:59:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3497 transitions. [2021-11-23 01:59:40,166 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3497 transitions. Word has length 60 [2021-11-23 01:59:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 3497 transitions. [2021-11-23 01:59:40,166 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) [2021-11-23 01:59:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3497 transitions. [2021-11-23 01:59:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 01:59:40,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:40,171 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] [2021-11-23 01:59:40,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 01:59:40,172 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)] === [2021-11-23 01:59:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:40,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1469253499, now seen corresponding path program 1 times [2021-11-23 01:59:40,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:40,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113564039] [2021-11-23 01:59:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:40,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:40,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:40,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113564039] [2021-11-23 01:59:40,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113564039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:40,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:40,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 01:59:40,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763336512] [2021-11-23 01:59:40,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:40,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 01:59:40,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 01:59:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:59:40,319 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) [2021-11-23 01:59:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:42,224 INFO L93 Difference]: Finished difference Result 6291 states and 7991 transitions. [2021-11-23 01:59:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 01:59:42,224 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 [2021-11-23 01:59:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:42,242 INFO L225 Difference]: With dead ends: 6291 [2021-11-23 01:59:42,242 INFO L226 Difference]: Without dead ends: 6289 [2021-11-23 01:59:42,245 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 [2021-11-23 01:59:42,246 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 [2021-11-23 01:59:42,246 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] [2021-11-23 01:59:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-11-23 01:59:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 3328. [2021-11-23 01:59:43,104 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) [2021-11-23 01:59:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4233 transitions. [2021-11-23 01:59:43,109 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4233 transitions. Word has length 65 [2021-11-23 01:59:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:43,109 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4233 transitions. [2021-11-23 01:59:43,109 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) [2021-11-23 01:59:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4233 transitions. [2021-11-23 01:59:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 01:59:43,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:43,112 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] [2021-11-23 01:59:43,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 01:59:43,112 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)] === [2021-11-23 01:59:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash 835374526, now seen corresponding path program 1 times [2021-11-23 01:59:43,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:43,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248052006] [2021-11-23 01:59:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:43,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:43,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:43,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248052006] [2021-11-23 01:59:43,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248052006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:43,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:43,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:43,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866279608] [2021-11-23 01:59:43,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:43,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:43,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:43,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:43,180 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) [2021-11-23 01:59:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:44,069 INFO L93 Difference]: Finished difference Result 6482 states and 8411 transitions. [2021-11-23 01:59:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:44,070 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 [2021-11-23 01:59:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:44,079 INFO L225 Difference]: With dead ends: 6482 [2021-11-23 01:59:44,079 INFO L226 Difference]: Without dead ends: 4451 [2021-11-23 01:59:44,082 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 [2021-11-23 01:59:44,083 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 243 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2021-11-23 01:59:44,084 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] [2021-11-23 01:59:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-11-23 01:59:45,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 4155. [2021-11-23 01:59:45,073 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) [2021-11-23 01:59:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5266 transitions. [2021-11-23 01:59:45,081 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 5266 transitions. Word has length 65 [2021-11-23 01:59:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:45,081 INFO L470 AbstractCegarLoop]: Abstraction has 4155 states and 5266 transitions. [2021-11-23 01:59:45,082 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) [2021-11-23 01:59:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 5266 transitions. [2021-11-23 01:59:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 01:59:45,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:45,086 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] [2021-11-23 01:59:45,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 01:59:45,086 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)] === [2021-11-23 01:59:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1048433134, now seen corresponding path program 1 times [2021-11-23 01:59:45,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:45,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078627724] [2021-11-23 01:59:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:45,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:45,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:45,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078627724] [2021-11-23 01:59:45,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078627724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:45,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:45,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 01:59:45,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700478746] [2021-11-23 01:59:45,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:45,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 01:59:45,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 01:59:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:59:45,250 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) [2021-11-23 01:59:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:47,239 INFO L93 Difference]: Finished difference Result 7278 states and 9224 transitions. [2021-11-23 01:59:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 01:59:47,240 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 [2021-11-23 01:59:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:47,250 INFO L225 Difference]: With dead ends: 7278 [2021-11-23 01:59:47,250 INFO L226 Difference]: Without dead ends: 7276 [2021-11-23 01:59:47,252 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 [2021-11-23 01:59:47,253 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 [2021-11-23 01:59:47,253 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] [2021-11-23 01:59:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-11-23 01:59:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 4478. [2021-11-23 01:59:48,265 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) [2021-11-23 01:59:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 5661 transitions. [2021-11-23 01:59:48,274 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 5661 transitions. Word has length 71 [2021-11-23 01:59:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:48,275 INFO L470 AbstractCegarLoop]: Abstraction has 4478 states and 5661 transitions. [2021-11-23 01:59:48,275 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) [2021-11-23 01:59:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 5661 transitions. [2021-11-23 01:59:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 01:59:48,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:48,279 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] [2021-11-23 01:59:48,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 01:59:48,279 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)] === [2021-11-23 01:59:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:48,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1409043330, now seen corresponding path program 1 times [2021-11-23 01:59:48,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:48,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195939605] [2021-11-23 01:59:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:48,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:48,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:48,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195939605] [2021-11-23 01:59:48,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195939605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:48,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:48,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 01:59:48,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112745141] [2021-11-23 01:59:48,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:48,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 01:59:48,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 01:59:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:59:48,419 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) [2021-11-23 01:59:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:50,439 INFO L93 Difference]: Finished difference Result 7351 states and 9313 transitions. [2021-11-23 01:59:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 01:59:50,439 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 [2021-11-23 01:59:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:50,447 INFO L225 Difference]: With dead ends: 7351 [2021-11-23 01:59:50,447 INFO L226 Difference]: Without dead ends: 7349 [2021-11-23 01:59:50,449 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 [2021-11-23 01:59:50,450 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 [2021-11-23 01:59:50,451 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] [2021-11-23 01:59:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-11-23 01:59:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 4825. [2021-11-23 01:59:51,603 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) [2021-11-23 01:59:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 6090 transitions. [2021-11-23 01:59:51,615 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 6090 transitions. Word has length 75 [2021-11-23 01:59:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:51,615 INFO L470 AbstractCegarLoop]: Abstraction has 4825 states and 6090 transitions. [2021-11-23 01:59:51,616 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) [2021-11-23 01:59:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 6090 transitions. [2021-11-23 01:59:51,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 01:59:51,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:51,624 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] [2021-11-23 01:59:51,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 01:59:51,625 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)] === [2021-11-23 01:59:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:51,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2071996820, now seen corresponding path program 1 times [2021-11-23 01:59:51,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:51,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052502227] [2021-11-23 01:59:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:51,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:51,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:51,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052502227] [2021-11-23 01:59:51,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052502227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:51,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:51,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 01:59:51,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542273042] [2021-11-23 01:59:51,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:51,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 01:59:51,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 01:59:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:59:51,842 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) [2021-11-23 01:59:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:53,892 INFO L93 Difference]: Finished difference Result 7410 states and 9415 transitions. [2021-11-23 01:59:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 01:59:53,893 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 [2021-11-23 01:59:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:53,901 INFO L225 Difference]: With dead ends: 7410 [2021-11-23 01:59:53,901 INFO L226 Difference]: Without dead ends: 7408 [2021-11-23 01:59:53,903 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 [2021-11-23 01:59:53,903 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:53,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1390 Valid, 2574 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:59:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7408 states. [2021-11-23 01:59:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7408 to 4789. [2021-11-23 01:59:54,949 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) [2021-11-23 01:59:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 6046 transitions. [2021-11-23 01:59:54,956 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 6046 transitions. Word has length 75 [2021-11-23 01:59:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:54,956 INFO L470 AbstractCegarLoop]: Abstraction has 4789 states and 6046 transitions. [2021-11-23 01:59:54,956 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) [2021-11-23 01:59:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 6046 transitions. [2021-11-23 01:59:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 01:59:54,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:54,961 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] [2021-11-23 01:59:54,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 01:59:54,961 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)] === [2021-11-23 01:59:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2066736926, now seen corresponding path program 1 times [2021-11-23 01:59:54,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:54,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849978545] [2021-11-23 01:59:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:54,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:55,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:55,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849978545] [2021-11-23 01:59:55,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849978545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:55,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473499830] [2021-11-23 01:59:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:55,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:55,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:55,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:55,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:59:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:55,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 01:59:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 01:59:56,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:59:56,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473499830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:56,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:59:56,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 22 [2021-11-23 01:59:56,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752709811] [2021-11-23 01:59:56,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:56,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:59:56,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:56,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:59:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-23 01:59:56,550 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) [2021-11-23 01:59:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:59,428 INFO L93 Difference]: Finished difference Result 8122 states and 10274 transitions. [2021-11-23 01:59:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 01:59:59,429 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 [2021-11-23 01:59:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:59,436 INFO L225 Difference]: With dead ends: 8122 [2021-11-23 01:59:59,436 INFO L226 Difference]: Without dead ends: 6293 [2021-11-23 01:59:59,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-11-23 01:59:59,440 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 1713 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 [2021-11-23 01:59:59,441 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] [2021-11-23 01:59:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2021-11-23 02:00:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 4772. [2021-11-23 02:00:00,540 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) [2021-11-23 02:00:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 6028 transitions. [2021-11-23 02:00:00,547 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 6028 transitions. Word has length 77 [2021-11-23 02:00:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:00,547 INFO L470 AbstractCegarLoop]: Abstraction has 4772 states and 6028 transitions. [2021-11-23 02:00:00,547 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) [2021-11-23 02:00:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 6028 transitions. [2021-11-23 02:00:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 02:00:00,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:00,551 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] [2021-11-23 02:00:00,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:00:00,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 02:00:00,777 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)] === [2021-11-23 02:00:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash -175558868, now seen corresponding path program 1 times [2021-11-23 02:00:00,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464237208] [2021-11-23 02:00:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:00,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:00:00,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:00,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464237208] [2021-11-23 02:00:00,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464237208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:00,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:00:00,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:00:00,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220827919] [2021-11-23 02:00:00,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:00,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:00:00,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:00:00,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:00:00,923 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) [2021-11-23 02:00:03,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:03,227 INFO L93 Difference]: Finished difference Result 7642 states and 9673 transitions. [2021-11-23 02:00:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:00:03,228 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 [2021-11-23 02:00:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:03,235 INFO L225 Difference]: With dead ends: 7642 [2021-11-23 02:00:03,235 INFO L226 Difference]: Without dead ends: 5810 [2021-11-23 02:00:03,239 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 [2021-11-23 02:00:03,240 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 [2021-11-23 02:00:03,240 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] [2021-11-23 02:00:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2021-11-23 02:00:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 4537. [2021-11-23 02:00:04,294 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) [2021-11-23 02:00:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 5723 transitions. [2021-11-23 02:00:04,300 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 5723 transitions. Word has length 77 [2021-11-23 02:00:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:04,300 INFO L470 AbstractCegarLoop]: Abstraction has 4537 states and 5723 transitions. [2021-11-23 02:00:04,301 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) [2021-11-23 02:00:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 5723 transitions. [2021-11-23 02:00:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 02:00:04,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:04,304 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] [2021-11-23 02:00:04,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:00:04,305 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)] === [2021-11-23 02:00:04,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash -262712424, now seen corresponding path program 1 times [2021-11-23 02:00:04,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:04,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767148386] [2021-11-23 02:00:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:04,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:00:04,723 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:04,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767148386] [2021-11-23 02:00:04,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767148386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:00:04,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794443074] [2021-11-23 02:00:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:04,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:04,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:04,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:04,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:00:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:00:04,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:00:06,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:00:06,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794443074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:06,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:00:06,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 26 [2021-11-23 02:00:06,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265959427] [2021-11-23 02:00:06,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:06,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:00:06,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:06,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:00:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:00:06,473 INFO L87 Difference]: Start difference. First operand 4537 states and 5723 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 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) [2021-11-23 02:00:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:09,177 INFO L93 Difference]: Finished difference Result 8925 states and 11311 transitions. [2021-11-23 02:00:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:00:09,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 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 78 [2021-11-23 02:00:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:09,185 INFO L225 Difference]: With dead ends: 8925 [2021-11-23 02:00:09,185 INFO L226 Difference]: Without dead ends: 7113 [2021-11-23 02:00:09,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:00:09,190 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 2404 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 2464 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:09,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2404 Valid, 2464 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:00:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-11-23 02:00:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 4798. [2021-11-23 02:00:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 4797 states have (on average 1.2624557014800917) internal successors, (6056), 4797 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 6056 transitions. [2021-11-23 02:00:10,405 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 6056 transitions. Word has length 78 [2021-11-23 02:00:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:10,406 INFO L470 AbstractCegarLoop]: Abstraction has 4798 states and 6056 transitions. [2021-11-23 02:00:10,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 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) [2021-11-23 02:00:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 6056 transitions. [2021-11-23 02:00:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 02:00:10,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:10,410 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] [2021-11-23 02:00:10,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:00:10,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 02:00:10,625 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)] === [2021-11-23 02:00:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1477843576, now seen corresponding path program 1 times [2021-11-23 02:00:10,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:10,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285447697] [2021-11-23 02:00:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:10,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:00:11,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:11,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285447697] [2021-11-23 02:00:11,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285447697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:00:11,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574043409] [2021-11-23 02:00:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:11,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:11,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:11,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:11,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:00:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-23 02:00:11,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:00:13,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:00:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:00:20,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574043409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:00:20,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695748991] [2021-11-23 02:00:20,745 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2021-11-23 02:00:20,746 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:00:20,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:00:20,758 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:00:20,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:00:21,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:21,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:21,203 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 [2021-11-23 02:00:21,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:21,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:21,286 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 [2021-11-23 02:01:47,092 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:13,547 WARN L227 SmtUtils]: Spent 24.16s on a formula simplification. DAG size of input: 594 DAG size of output: 583 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:04:53,738 WARN L227 SmtUtils]: Spent 8.96s on a formula simplification. DAG size of input: 563 DAG size of output: 559 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:05:03,760 WARN L227 SmtUtils]: Spent 9.14s on a formula simplification. DAG size of input: 565 DAG size of output: 563 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:05:20,002 WARN L227 SmtUtils]: Spent 12.87s on a formula simplification that was a NOOP. DAG size: 561 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:05:36,613 WARN L227 SmtUtils]: Spent 13.07s on a formula simplification that was a NOOP. DAG size: 562 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:05:53,187 WARN L227 SmtUtils]: Spent 13.00s on a formula simplification that was a NOOP. DAG size: 583 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:06:10,121 WARN L227 SmtUtils]: Spent 13.09s on a formula simplification that was a NOOP. DAG size: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:06:57,778 WARN L227 SmtUtils]: Spent 43.62s on a formula simplification. DAG size of input: 597 DAG size of output: 584 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:07:47,431 WARN L227 SmtUtils]: Spent 45.33s on a formula simplification. DAG size of input: 601 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:08:07,269 WARN L227 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 667 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:08:28,121 WARN L227 SmtUtils]: Spent 14.99s on a formula simplification that was a NOOP. DAG size: 667 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:08:50,034 WARN L227 SmtUtils]: Spent 15.83s on a formula simplification that was a NOOP. DAG size: 671 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:09:12,223 WARN L227 SmtUtils]: Spent 15.65s on a formula simplification that was a NOOP. DAG size: 774 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:09:12,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '291384#(and (= ~nomsg~0 ~p1_new~0) (= |ULTIMATE.start_main_~assert__arg~1#1| |ULTIMATE.start_main_~__tmp_2~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~52#1| ~__tmp_5188_0~0) (= ~p3_new~0 ~nomsg~0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_2~0#1|) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_5213~0) (= ~nomsg~0 ~p2_new~0) (= ~__tmp_4534_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1|) (or (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (and (<= 3 ~r1~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (= ~__tmp_4534_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~52#1|) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (= |ULTIMATE.start_main_~check__tmp~58#1| ~__return_5213~0) (or (and (<= 1 |ULTIMATE.start_main_~check__tmp~67#1|) (<= ~__return_1240~0 0) (<= ~__tmp_2489_0~0 0) (<= ~__return_2948~0 0) (<= 0 ~__tmp_2933_0~0) (<= ~__return_1200~0 0) (<= ~__tmp_1994_0~0 0) (<= 0 ~__return_1280~0) (<= ~__tmp_3255_0~0 0) (<= 0 ~__return_1150~0) (<= 0 ~__return_1300~0) (<= ~send3~0 127) (<= ~p3~0 0) (<= ~__return_3771~0 0) (<= 0 ~id3~0) (<= 0 ~__return_1120~0) (<= (+ |ULTIMATE.start_main_~node1__m1~64#1| 1) 0) (<= ~__tmp_4824_0~0 0) (<= 0 ~__return_3975~0) (<= 0 ~__return_1160~0) (<= 0 ~__return_1330~0) (<= (+ |ULTIMATE.start_main_~node3__m3~37#1| 1) 0) (<= 0 ~__tmp_5374_0~0) (<= 0 ~__return_1350~0) (<= 0 ~__tmp_3554_0~0) (<= 0 ~__tmp_4308_0~0) (<= 0 |#NULL.base|) (<= 0 ~__return_3658~0) (<= ~__return_1510~0 0) (<= ~st3~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~42#1| 1) 0) (<= 0 ~__return_1260~0) (<= 0 ~__return_1380~0) (<= ~__tmp_3792_0~0 0) (<= 0 ~__tmp_2769_0~0) (<= 0 ~__tmp_3453_0~0) (<= 0 ~__return_3150~0) (<= ~__return_3975~0 0) (<= 0 ~__return_1510~0) (<= |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~12#1| 127) (<= ~__tmp_3441_0~0 0) (<= 0 ~__return_1460~0) (<= ~__return_102~0 1) (<= 0 ~__tmp_4730_0~0) (<= 0 ~__return_1250~0) (<= ~__tmp_2933_0~0 0) (<= 0 ~__tmp_4918_0~0) (<= 0 (+ ~p1_old~0 1)) (<= ~__tmp_2079_0~0 0) (<= ~__tmp_2428_0~0 0) (<= 0 ~__tmp_3465_0~0) (<= ~__return_4397~0 0) (<= 0 ~__return_1130~0) (<= 0 ~__return_1270~0) (<= ~__tmp_3171_0~0 0) (<= 0 ~__tmp_2692_0~0) (<= 0 ~__tmp_2972_0~0) (<= 0 ~__return_1230~0) (<= ~__tmp_4159_0~0 0) (<= ~__return_3569~0 0) (<= 0 ~__tmp_2251_0~0) (<= 0 ~__return_1180~0) (<= ~__tmp_2781_0~0 0) (<= ~__return_1280~0 0) (<= 0 ~id1~0) (<= 0 ~__return_1470~0) (<= ~__tmp_3605_0~0 0) (<= ~__tmp_5338_0~0 1) (<= 0 ~__tmp_4109_0~0) (<= 0 ~__return_2796~0) (<= ~__tmp_2055_0~0 0) (<= ~__return_1180~0 0) (<= ~__return_1260~0 0) (<= 0 ~__tmp_3876_0~0) (<= ~__tmp_2600_0~0 0) (<= ~__return_1470~0 0) (<= ~__tmp_5012_0~0 0) (<= 0 ~__return_1370~0) (<= ~__return_1160~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~35#1| 1)) (<= 0 ~__tmp_2921_0~0) (<= ~__return_1450~0 0) (<= 0 ~__tmp_2079_0~0) (<= 0 ~__return_1560~0) (<= ~__return_1130~0 0) (<= 0 ~__tmp_4075_0~0) (<= ~__tmp_2251_0~0 0) (<= ~__return_3480~0 0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~62#1| 0) (<= 0 ~__return_1220~0) (<= 0 ~__return_1100~0) (<= 1 |ULTIMATE.start_main_~check__tmp~69#1|) (<= 0 ~__return_2859~0) (<= 0 ~__tmp_3593_0~0) (<= ~__return_1120~0 0) (<= ~__return_1220~0 0) (<= ~__tmp_3465_0~0 0) (<= 0 ~__tmp_3792_0~0) (<= 0 ~__return_2554~0) (<= 1 ~__return_102~0) (<= ~__return_3328~0 0) (<= 0 ~mode3~0) (<= ~__return_1310~0 0) (<= ~__return_1530~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~43#1| 1)) (<= ~__return_1110~0 0) (<= 0 ~__return_3328~0) (<= 0 ~__return_1530~0) (<= 0 ~__tmp_4159_0~0) (<= ~__tmp_2343_0~0 0) (<= 0 ~__return_1550~0) (<= 0 ~__return_1520~0) (<= ~__return_1190~0 1) (<= 0 ~__tmp_2984_0~0) (<= (+ |ULTIMATE.start_main_~node2__m2~46#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~46#1| 1)) (<= 0 ~__return_2205~0) (<= ~__return_2094~0 0) (<= ~__return_1490~0 0) (<= ~__tmp_2769_0~0 0) (<= 0 ~__tmp_3289_0~0) (<= 0 ~__return_1450~0) (<= ~__tmp_3301_0~0 0) (<= ~__return_2554~0 0) (<= 0 (+ ~p3_old~0 1)) (<= 0 ~__return_3771~0) (<= ~__tmp_3313_0~0 0) (<= 0 ~__tmp_3171_0~0) (<= 0 ~__return_3417~0) (<= ~__return_1440~0 0) (<= ~__return_1540~0 0) (<= 0 ~__tmp_4560_0~0) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~12#1|) (<= ~__tmp_3804_0~0 0) (<= 0 ~__return_1420~0) (<= ~__tmp_2844_0~0 0) (<= ~__tmp_3910_0~0 0) (<= 1 ~__return_1190~0) (<= 0 ~__return_1400~0) (<= ~__return_1430~0 0) (<= 1 ~__tmp_5135_0~0) (<= 0 ~__tmp_2600_0~0) (<= 0 ~__return_1290~0) (<= ~__tmp_2972_0~0 0) (<= ~__tmp_2820_0~0 0) (<= 0 ~__tmp_2489_0~0) (<= |ULTIMATE.start_main_~assert__arg~68#1| 1) (<= ~__return_1460~0 0) (<= 0 ~__return_1480~0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~45#1| 1)) (<= ~__tmp_3960_0~0 0) (<= 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|ULTIMATE.start_main_~__tmp_67~0#1| 1) (<= 0 ~__return_3037~0) (<= ~__tmp_2680_0~0 0) (<= 0 ~__return_1360~0) (<= ~__return_1400~0 0) (<= 0 ~__return_2443~0) (<= 0 ~__tmp_3183_0~0) (<= 0 ~__return_3569~0) (<= |#NULL.base| 0) (<= ~__return_2443~0 0) (<= 0 ~__return_1500~0) (<= ~__tmp_4730_0~0 0) (<= ~__return_1370~0 0) (<= ~__tmp_4918_0~0 0) (<= |ULTIMATE.start_main_~check__tmp~67#1| 1) (<= ~__tmp_3542_0~0 0) (<= 0 ~__tmp_3390_0~0) (<= 1 ~mode3~0) (<= 0 ~__return_1140~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~64#1| 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~43#1| 1) 0) (<= 0 ~__return_1210~0) (<= ~__tmp_3453_0~0 0) (<= 0 ~__tmp_3441_0~0) (<= ~__return_1480~0 0) (<= ~__return_1150~0 0) (<= ~__return_4174~0 0) (<= ~__return_3658~0 0) (<= ~__tmp_5226_0~0 0) (<= |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~10#1| 127) (<= 0 ~__tmp_3313_0~0) (<= ~__return_1140~0 0) (<= ~__return_1330~0 0) (<= ~__return_3417~0 0) (<= 0 ~__tmp_3301_0~0) (<= ~__tmp_3402_0~0 0) (<= 0 ~__tmp_5103_0~0) (<= 0 ~__tmp_2668_0~0) (<= 0 ~__return_main~0) (<= ~__tmp_2832_0~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_69~0#1|) (<= 0 ~__tmp_2140_0~0) (<= 0 ~__return_1110~0) (<= ~id3~0 127) (<= 0 ~__tmp_2781_0~0) (<= 0 ~__return_2009~0) (<= ~__return_2859~0 0) (<= ~__return_1420~0 0) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= 0 ~__tmp_5012_0~0) (<= 0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~62#1|) (<= ~__return_1100~0 0) (<= 0 ~__return_4397~0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~61#1| 0) (<= 0 ~__return_4088~0) (<= 0 ~__return_1540~0) (<= ~__tmp_2668_0~0 0) (<= ~__return_1300~0 0) (<= ~p2~0 0) (<= 0 ~__tmp_3099_0~0) (<= ~__return_1500~0 0) (<= ~__tmp_4560_0~0 0) (<= ~__return_1560~0 0) (<= ~__return_1210~0 0) (<= ~__return_4287~0 0) (<= ~__tmp_4274_0~0 0) (<= 0 ~__tmp_3542_0~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= 0 ~__tmp_3720_0~0) (<= |ULTIMATE.start_main_~__tmp_69~0#1| 1) (<= ~__tmp_3390_0~0 0) (<= ~__tmp_2692_0~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~68#1|) (<= ~__tmp_2319_0~0 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= ~__return_3037~0 0) (<= 0 |#NULL.offset|) (<= 0 ~__tmp_2844_0~0) (<= 0 ~__tmp_1970_0~0) (<= ~__return_1170~0 0) (<= (+ ~p2_old~0 1) 0) (<= 0 ~__return_1390~0) (<= ~__return_4088~0 0) (<= 0 ~__tmp_3960_0~0) (<= ~__return_1290~0 0) (<= (+ ~p1_old~0 1) 0) (<= 0 ~__tmp_2832_0~0) (<= ~__tmp_3554_0~0 0) (<= 0 ~send3~0) (<= ~__return_1520~0 0) (<= 0 ~p1~0) (<= 0 ~__tmp_2343_0~0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~__tmp_67~0#1|) (<= ~__tmp_3183_0~0 0) (<= 0 ~__tmp_4824_0~0) (<= ~__tmp_2921_0~0 0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~63#1| 1) (<= 0 ~__tmp_2680_0~0) (<= 0 ~__return_4174~0) (<= ~__tmp_5374_0~0 0) (<= 0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~61#1|) (<= ~__return_1250~0 0) (<= ~__tmp_3876_0~0 0) (<= ~__return_1550~0 0) (<= |ULTIMATE.start_main_~check__tmp~69#1| 1) (<= 0 ~__tmp_5226_0~0) (<= 0 ~__return_4287~0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (<= ~__return_3150~0 0) (<= 0 ~__return_3480~0) (<= 1 ~__tmp_5338_0~0) (<= 0 ~__tmp_5273_0~0) (<= ~__return_2205~0 0) (<= ~__return_1320~0 0) (<= 0 ~__return_2707~0) (<= ~__tmp_3720_0~0 0) (<= 0 ~__tmp_2820_0~0) (<= ~__return_2707~0 0))))' at error location [2021-11-23 02:09:12,230 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:12,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:09:12,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2021-11-23 02:09:12,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362908449] [2021-11-23 02:09:12,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:12,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 02:09:12,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 02:09:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1464, Invalid=8636, Unknown=0, NotChecked=0, Total=10100 [2021-11-23 02:09:12,236 INFO L87 Difference]: Start difference. First operand 4798 states and 6056 transitions. Second operand has 46 states, 46 states have (on average 5.021739130434782) internal successors, (231), 46 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:49,995 INFO L93 Difference]: Finished difference Result 22881 states and 29423 transitions. [2021-11-23 02:09:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-23 02:09:50,017 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.021739130434782) internal successors, (231), 46 states have internal predecessors, (231), 0 states have call successors, (0), 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 [2021-11-23 02:09:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:50,054 INFO L225 Difference]: With dead ends: 22881 [2021-11-23 02:09:50,054 INFO L226 Difference]: Without dead ends: 20285 [2021-11-23 02:09:50,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 137 SyntacticMatches, 13 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19661 ImplicationChecksByTransitivity, 471.8s TimeCoverageRelationStatistics Valid=5218, Invalid=39514, Unknown=0, NotChecked=0, Total=44732 [2021-11-23 02:09:50,079 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 7811 mSDsluCounter, 3441 mSDsCounter, 0 mSdLazyCounter, 4691 mSolverCounterSat, 1070 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7811 SdHoareTripleChecker+Valid, 3725 SdHoareTripleChecker+Invalid, 5761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1070 IncrementalHoareTripleChecker+Valid, 4691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:50,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7811 Valid, 3725 Invalid, 5761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1070 Valid, 4691 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 02:09:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20285 states. [2021-11-23 02:09:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20285 to 9690. [2021-11-23 02:09:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 1.2637011043451336) internal successors, (12244), 9689 states have internal predecessors, (12244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 12244 transitions. [2021-11-23 02:09:53,570 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 12244 transitions. Word has length 78 [2021-11-23 02:09:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:53,571 INFO L470 AbstractCegarLoop]: Abstraction has 9690 states and 12244 transitions. [2021-11-23 02:09:53,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.021739130434782) internal successors, (231), 46 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 12244 transitions. [2021-11-23 02:09:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 02:09:53,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:53,576 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, 1, 1, 1] [2021-11-23 02:09:53,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:53,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 02:09:53,801 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 02:09:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:53,802 INFO L85 PathProgramCache]: Analyzing trace with hash -898207466, now seen corresponding path program 1 times [2021-11-23 02:09:53,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:53,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869576580] [2021-11-23 02:09:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:53,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:53,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869576580] [2021-11-23 02:09:53,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869576580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:53,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:53,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:09:53,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816046492] [2021-11-23 02:09:53,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:53,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:53,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:53,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:53,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:53,882 INFO L87 Difference]: Start difference. First operand 9690 states and 12244 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:09:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:58,451 INFO L93 Difference]: Finished difference Result 14138 states and 18058 transitions. [2021-11-23 02:09:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:58,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 [2021-11-23 02:09:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:58,468 INFO L225 Difference]: With dead ends: 14138 [2021-11-23 02:09:58,469 INFO L226 Difference]: Without dead ends: 12559 [2021-11-23 02:09:58,474 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 [2021-11-23 02:09:58,475 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 254 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:58,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 628 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:09:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12559 states. [2021-11-23 02:10:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12559 to 12012. [2021-11-23 02:10:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12012 states, 12011 states have (on average 1.257597202564316) internal successors, (15105), 12011 states have internal predecessors, (15105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12012 states to 12012 states and 15105 transitions. [2021-11-23 02:10:02,455 INFO L78 Accepts]: Start accepts. Automaton has 12012 states and 15105 transitions. Word has length 78 [2021-11-23 02:10:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:02,455 INFO L470 AbstractCegarLoop]: Abstraction has 12012 states and 15105 transitions. [2021-11-23 02:10:02,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 12012 states and 15105 transitions. [2021-11-23 02:10:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 02:10:02,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:02,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:02,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:10:02,459 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 02:10:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -729061492, now seen corresponding path program 1 times [2021-11-23 02:10:02,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:02,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379856932] [2021-11-23 02:10:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:02,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:10:02,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:02,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379856932] [2021-11-23 02:10:02,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379856932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:02,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:02,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:10:02,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114495589] [2021-11-23 02:10:02,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:02,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:10:02,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:02,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:10:02,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:10:02,585 INFO L87 Difference]: Start difference. First operand 12012 states and 15105 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 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) [2021-11-23 02:10:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:10,041 INFO L93 Difference]: Finished difference Result 20849 states and 26091 transitions. [2021-11-23 02:10:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:10:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 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 80 [2021-11-23 02:10:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:10,060 INFO L225 Difference]: With dead ends: 20849 [2021-11-23 02:10:10,060 INFO L226 Difference]: Without dead ends: 17478 [2021-11-23 02:10:10,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:10:10,066 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 1312 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:10,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1312 Valid, 1491 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:10:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2021-11-23 02:10:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 11995. [2021-11-23 02:10:14,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11995 states, 11994 states have (on average 1.2577955644488912) internal successors, (15086), 11994 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11995 states to 11995 states and 15086 transitions. [2021-11-23 02:10:14,503 INFO L78 Accepts]: Start accepts. Automaton has 11995 states and 15086 transitions. Word has length 80 [2021-11-23 02:10:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:14,503 INFO L470 AbstractCegarLoop]: Abstraction has 11995 states and 15086 transitions. [2021-11-23 02:10:14,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 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) [2021-11-23 02:10:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 11995 states and 15086 transitions. [2021-11-23 02:10:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 02:10:14,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:14,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:14,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:10:14,508 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 02:10:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:14,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1503101788, now seen corresponding path program 1 times [2021-11-23 02:10:14,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:14,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304084803] [2021-11-23 02:10:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:14,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:10:14,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:14,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304084803] [2021-11-23 02:10:14,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304084803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:14,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:14,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 02:10:14,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020672433] [2021-11-23 02:10:14,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:14,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:10:14,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:10:14,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:10:14,850 INFO L87 Difference]: Start difference. First operand 11995 states and 15086 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:22,862 INFO L93 Difference]: Finished difference Result 28520 states and 35921 transitions. [2021-11-23 02:10:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 02:10:22,865 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 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 81 [2021-11-23 02:10:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:22,892 INFO L225 Difference]: With dead ends: 28520 [2021-11-23 02:10:22,892 INFO L226 Difference]: Without dead ends: 20754 [2021-11-23 02:10:22,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:10:22,903 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1850 mSDsluCounter, 3847 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 4451 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:22,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 4451 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:10:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20754 states. [2021-11-23 02:10:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20754 to 12107. [2021-11-23 02:10:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12107 states, 12106 states have (on average 1.2569800099124402) internal successors, (15217), 12106 states have internal predecessors, (15217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12107 states to 12107 states and 15217 transitions. [2021-11-23 02:10:26,740 INFO L78 Accepts]: Start accepts. Automaton has 12107 states and 15217 transitions. Word has length 81 [2021-11-23 02:10:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:26,741 INFO L470 AbstractCegarLoop]: Abstraction has 12107 states and 15217 transitions. [2021-11-23 02:10:26,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 12107 states and 15217 transitions. [2021-11-23 02:10:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 02:10:26,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:26,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:26,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 02:10:26,746 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 02:10:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash -457716011, now seen corresponding path program 1 times [2021-11-23 02:10:26,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:26,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95793999] [2021-11-23 02:10:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:26,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:27,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:27,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95793999] [2021-11-23 02:10:27,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95793999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:10:27,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347916355] [2021-11-23 02:10:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:27,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:27,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:27,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:27,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbdde506-96f6-4875-9071-710fefb5c53e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:10:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:27,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 02:10:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:29,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:30,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347916355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:30,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626361588] [2021-11-23 02:10:30,807 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2021-11-23 02:10:30,807 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:10:30,807 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:10:30,808 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:10:30,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:10:31,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:10:31,066 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 [2021-11-23 02:10:31,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:31,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:10:31,111 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 [2021-11-23 02:10:34,577 INFO L180 IcfgInterpreter]: Interpretation finished