./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS --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 0dcd4461cca64e9ab41b6ad7ff4c6eaa4177bddcca1c612fa1571b77ac664a95 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:39:12,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:39:12,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:39:12,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:39:12,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:39:12,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:39:12,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:39:12,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:39:12,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:39:12,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:39:12,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:39:12,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:39:12,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:39:12,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:39:12,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:39:12,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:39:12,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:39:12,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:39:12,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:39:12,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:39:12,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:39:12,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:39:12,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:39:12,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:39:12,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:39:12,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:39:12,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:39:12,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:39:12,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:39:12,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:39:12,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:39:12,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:39:12,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:39:12,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:39:12,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:39:12,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:39:12,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:39:12,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:39:12,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:39:12,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:39:12,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:39:12,555 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:39:12,603 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:39:12,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:39:12,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:39:12,612 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:39:12,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:39:12,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:39:12,614 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:39:12,614 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:39:12,614 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:39:12,615 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:39:12,616 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:39:12,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:39:12,616 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:39:12,617 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:39:12,617 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:39:12,617 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:39:12,617 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:39:12,618 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:39:12,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:39:12,619 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:39:12,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:39:12,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:39:12,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:39:12,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:39:12,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:39:12,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:39:12,620 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:39:12,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:39:12,621 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:39:12,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:39:12,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:39:12,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:39:12,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:39:12,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:39:12,623 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:39:12,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:39:12,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:39:12,624 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:39:12,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:39:12,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:39:12,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:39:12,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dcd4461cca64e9ab41b6ad7ff4c6eaa4177bddcca1c612fa1571b77ac664a95 [2022-11-19 07:39:12,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:39:12,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:39:13,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:39:13,002 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:39:13,003 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:39:13,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2022-11-19 07:39:13,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/data/26bd24472/74f7b6df2dc14466887ef9995d7b4259/FLAG3fdbd7f6e [2022-11-19 07:39:13,777 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:39:13,778 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2022-11-19 07:39:13,810 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/data/26bd24472/74f7b6df2dc14466887ef9995d7b4259/FLAG3fdbd7f6e [2022-11-19 07:39:14,084 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/data/26bd24472/74f7b6df2dc14466887ef9995d7b4259 [2022-11-19 07:39:14,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:39:14,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:39:14,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:39:14,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:39:14,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:39:14,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:14,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770cd4ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14, skipping insertion in model container [2022-11-19 07:39:14,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:14,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:39:14,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:39:14,512 WARN L234 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_743bcd49-768c-4877-8104-bfa229da1b9a/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[671,684] [2022-11-19 07:39:14,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:39:14,740 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:39:14,770 WARN L234 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_743bcd49-768c-4877-8104-bfa229da1b9a/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[671,684] [2022-11-19 07:39:14,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:39:14,947 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:39:14,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14 WrapperNode [2022-11-19 07:39:14,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:39:14,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:39:14,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:39:14,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:39:14,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:14,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,085 INFO L138 Inliner]: procedures = 54, calls = 70, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 911 [2022-11-19 07:39:15,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:39:15,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:39:15,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:39:15,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:39:15,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,173 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:39:15,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:39:15,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:39:15,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:39:15,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (1/1) ... [2022-11-19 07:39:15,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:39:15,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:15,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:39:15,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:39:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:39:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:39:15,318 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:39:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:39:15,319 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:39:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:39:15,319 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:39:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:39:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:39:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:39:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:39:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:39:15,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:39:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:39:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:39:15,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:39:15,501 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:39:15,504 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:39:16,975 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:39:17,778 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:39:17,779 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-19 07:39:17,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:17 BoogieIcfgContainer [2022-11-19 07:39:17,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:39:17,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:39:17,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:39:17,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:39:17,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:14" (1/3) ... [2022-11-19 07:39:17,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e07f997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:17, skipping insertion in model container [2022-11-19 07:39:17,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:14" (2/3) ... [2022-11-19 07:39:17,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e07f997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:17, skipping insertion in model container [2022-11-19 07:39:17,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:17" (3/3) ... [2022-11-19 07:39:17,795 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.13.cil-2.c [2022-11-19 07:39:17,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:39:17,820 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:39:17,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:39:17,901 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4836faac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:39:17,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:39:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 166 states have internal predecessors, (256), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-19 07:39:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:39:17,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:17,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:17,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash 784490566, now seen corresponding path program 1 times [2022-11-19 07:39:17,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:17,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635787077] [2022-11-19 07:39:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:39:18,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635787077] [2022-11-19 07:39:18,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635787077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:18,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:39:18,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:39:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806901318] [2022-11-19 07:39:18,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:18,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:39:18,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:39:18,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:39:18,775 INFO L87 Difference]: Start difference. First operand has 199 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 166 states have internal predecessors, (256), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:39:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:19,516 INFO L93 Difference]: Finished difference Result 580 states and 938 transitions. [2022-11-19 07:39:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:39:19,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-19 07:39:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:19,550 INFO L225 Difference]: With dead ends: 580 [2022-11-19 07:39:19,550 INFO L226 Difference]: Without dead ends: 382 [2022-11-19 07:39:19,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:39:19,569 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 541 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:19,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 866 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:39:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-19 07:39:19,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 381. [2022-11-19 07:39:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 318 states have (on average 1.5220125786163523) internal successors, (484), 320 states have internal predecessors, (484), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-19 07:39:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 584 transitions. [2022-11-19 07:39:19,721 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 584 transitions. Word has length 69 [2022-11-19 07:39:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:19,723 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 584 transitions. [2022-11-19 07:39:19,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:39:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 584 transitions. [2022-11-19 07:39:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:39:19,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:19,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:19,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:39:19,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash -300169029, now seen corresponding path program 1 times [2022-11-19 07:39:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:19,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763974321] [2022-11-19 07:39:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:19,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:39:20,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763974321] [2022-11-19 07:39:20,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763974321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:20,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597071347] [2022-11-19 07:39:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:20,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:20,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:20,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:20,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:39:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:39:20,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:39:20,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:20,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597071347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:20,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:20,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:39:20,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145726387] [2022-11-19 07:39:20,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:20,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:20,838 INFO L87 Difference]: Start difference. First operand 381 states and 584 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:21,088 INFO L93 Difference]: Finished difference Result 1126 states and 1757 transitions. [2022-11-19 07:39:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-11-19 07:39:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:21,097 INFO L225 Difference]: With dead ends: 1126 [2022-11-19 07:39:21,097 INFO L226 Difference]: Without dead ends: 750 [2022-11-19 07:39:21,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:21,101 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 258 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:21,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 545 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:39:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-19 07:39:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 746. [2022-11-19 07:39:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 627 states have (on average 1.5199362041467304) internal successors, (953), 630 states have internal predecessors, (953), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-19 07:39:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1141 transitions. [2022-11-19 07:39:21,221 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1141 transitions. Word has length 142 [2022-11-19 07:39:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:21,223 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1141 transitions. [2022-11-19 07:39:21,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1141 transitions. [2022-11-19 07:39:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:39:21,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:21,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:21,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:21,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:21,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:21,447 INFO L85 PathProgramCache]: Analyzing trace with hash -886186819, now seen corresponding path program 1 times [2022-11-19 07:39:21,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:21,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672657883] [2022-11-19 07:39:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:21,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:39:21,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:21,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672657883] [2022-11-19 07:39:21,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672657883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676277381] [2022-11-19 07:39:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:21,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:21,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:21,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:21,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:39:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:22,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:39:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:39:22,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:22,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676277381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:22,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:22,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:39:22,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40648347] [2022-11-19 07:39:22,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:22,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:22,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:22,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:22,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:22,208 INFO L87 Difference]: Start difference. First operand 746 states and 1141 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:22,533 INFO L93 Difference]: Finished difference Result 2215 states and 3448 transitions. [2022-11-19 07:39:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:22,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-11-19 07:39:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:22,546 INFO L225 Difference]: With dead ends: 2215 [2022-11-19 07:39:22,548 INFO L226 Difference]: Without dead ends: 1474 [2022-11-19 07:39:22,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:22,555 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 270 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:22,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 533 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:39:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2022-11-19 07:39:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1468. [2022-11-19 07:39:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1239 states have (on average 1.516545601291364) internal successors, (1879), 1244 states have internal predecessors, (1879), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-19 07:39:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2239 transitions. [2022-11-19 07:39:22,698 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2239 transitions. Word has length 142 [2022-11-19 07:39:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:22,698 INFO L495 AbstractCegarLoop]: Abstraction has 1468 states and 2239 transitions. [2022-11-19 07:39:22,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2239 transitions. [2022-11-19 07:39:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:39:22,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:22,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:22,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:22,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:22,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:22,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1228407361, now seen corresponding path program 1 times [2022-11-19 07:39:22,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:22,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202752556] [2022-11-19 07:39:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:22,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:39:23,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:23,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202752556] [2022-11-19 07:39:23,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202752556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:23,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005399465] [2022-11-19 07:39:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:23,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:23,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:23,202 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:23,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:39:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:39:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:39:23,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:23,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005399465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:23,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:23,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:39:23,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090678735] [2022-11-19 07:39:23,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:23,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:23,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:23,661 INFO L87 Difference]: Start difference. First operand 1468 states and 2239 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:24,037 INFO L93 Difference]: Finished difference Result 4369 states and 6780 transitions. [2022-11-19 07:39:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:24,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-11-19 07:39:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:24,058 INFO L225 Difference]: With dead ends: 4369 [2022-11-19 07:39:24,058 INFO L226 Difference]: Without dead ends: 2906 [2022-11-19 07:39:24,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:24,066 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 252 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:24,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 511 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:39:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-11-19 07:39:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2896. [2022-11-19 07:39:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2451 states have (on average 1.5124439004487964) internal successors, (3707), 2460 states have internal predecessors, (3707), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-19 07:39:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4403 transitions. [2022-11-19 07:39:24,358 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4403 transitions. Word has length 142 [2022-11-19 07:39:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:24,359 INFO L495 AbstractCegarLoop]: Abstraction has 2896 states and 4403 transitions. [2022-11-19 07:39:24,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4403 transitions. [2022-11-19 07:39:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:39:24,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:24,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:24,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:24,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:24,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -935103, now seen corresponding path program 1 times [2022-11-19 07:39:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:24,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315609143] [2022-11-19 07:39:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:39:24,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:24,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315609143] [2022-11-19 07:39:24,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315609143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:24,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104071869] [2022-11-19 07:39:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:24,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:24,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:24,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:24,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:39:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:25,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:39:25,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:39:25,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:25,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104071869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:25,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:25,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:39:25,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471119137] [2022-11-19 07:39:25,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:25,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:25,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:25,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:25,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:25,268 INFO L87 Difference]: Start difference. First operand 2896 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:25,806 INFO L93 Difference]: Finished difference Result 8629 states and 13344 transitions. [2022-11-19 07:39:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-11-19 07:39:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:25,850 INFO L225 Difference]: With dead ends: 8629 [2022-11-19 07:39:25,851 INFO L226 Difference]: Without dead ends: 5738 [2022-11-19 07:39:25,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:25,865 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 279 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:25,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 531 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:39:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2022-11-19 07:39:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 5720. [2022-11-19 07:39:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 4851 states have (on average 1.507936507936508) internal successors, (7315), 4868 states have internal predecessors, (7315), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-19 07:39:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 8667 transitions. [2022-11-19 07:39:26,333 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 8667 transitions. Word has length 142 [2022-11-19 07:39:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:26,333 INFO L495 AbstractCegarLoop]: Abstraction has 5720 states and 8667 transitions. [2022-11-19 07:39:26,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 8667 transitions. [2022-11-19 07:39:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:39:26,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:26,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:26,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:26,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:26,558 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:26,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:26,559 INFO L85 PathProgramCache]: Analyzing trace with hash -507536257, now seen corresponding path program 1 times [2022-11-19 07:39:26,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:26,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027344842] [2022-11-19 07:39:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:26,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:39:26,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027344842] [2022-11-19 07:39:26,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027344842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232571003] [2022-11-19 07:39:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:26,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:26,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:26,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:26,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:39:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:27,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:39:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:39:27,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:27,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232571003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:27,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:27,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:39:27,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943199954] [2022-11-19 07:39:27,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:27,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:27,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:27,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:27,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:27,258 INFO L87 Difference]: Start difference. First operand 5720 states and 8667 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:28,175 INFO L93 Difference]: Finished difference Result 17053 states and 26272 transitions. [2022-11-19 07:39:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-11-19 07:39:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:28,251 INFO L225 Difference]: With dead ends: 17053 [2022-11-19 07:39:28,251 INFO L226 Difference]: Without dead ends: 11338 [2022-11-19 07:39:28,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:28,279 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 276 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:28,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 541 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:39:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11338 states. [2022-11-19 07:39:28,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11338 to 11304. [2022-11-19 07:39:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11304 states, 9603 states have (on average 1.5031760908049567) internal successors, (14435), 9636 states have internal predecessors, (14435), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-19 07:39:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11304 states to 11304 states and 17067 transitions. [2022-11-19 07:39:29,057 INFO L78 Accepts]: Start accepts. Automaton has 11304 states and 17067 transitions. Word has length 142 [2022-11-19 07:39:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:29,058 INFO L495 AbstractCegarLoop]: Abstraction has 11304 states and 17067 transitions. [2022-11-19 07:39:29,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 11304 states and 17067 transitions. [2022-11-19 07:39:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:39:29,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:29,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:29,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 07:39:29,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:29,297 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:29,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:29,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1229550593, now seen corresponding path program 1 times [2022-11-19 07:39:29,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:29,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194032646] [2022-11-19 07:39:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:29,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:39:29,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:29,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194032646] [2022-11-19 07:39:29,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194032646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:29,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555099461] [2022-11-19 07:39:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:29,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:29,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:29,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:29,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:39:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:39:30,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:39:30,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:30,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555099461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:30,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:30,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:39:30,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332095338] [2022-11-19 07:39:30,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:30,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:30,103 INFO L87 Difference]: Start difference. First operand 11304 states and 17067 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:31,724 INFO L93 Difference]: Finished difference Result 33709 states and 51728 transitions. [2022-11-19 07:39:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:31,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-11-19 07:39:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:31,846 INFO L225 Difference]: With dead ends: 33709 [2022-11-19 07:39:31,847 INFO L226 Difference]: Without dead ends: 22410 [2022-11-19 07:39:31,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:31,897 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 264 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:31,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 511 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:39:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22410 states. [2022-11-19 07:39:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22410 to 22344. [2022-11-19 07:39:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22344 states, 19011 states have (on average 1.498237862290253) internal successors, (28483), 19076 states have internal predecessors, (28483), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-19 07:39:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22344 states to 22344 states and 33611 transitions. [2022-11-19 07:39:33,356 INFO L78 Accepts]: Start accepts. Automaton has 22344 states and 33611 transitions. Word has length 142 [2022-11-19 07:39:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:33,357 INFO L495 AbstractCegarLoop]: Abstraction has 22344 states and 33611 transitions. [2022-11-19 07:39:33,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 22344 states and 33611 transitions. [2022-11-19 07:39:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:39:33,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:33,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:33,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:39:33,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:33,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:33,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:33,615 INFO L85 PathProgramCache]: Analyzing trace with hash -146211197, now seen corresponding path program 1 times [2022-11-19 07:39:33,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:33,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441278534] [2022-11-19 07:39:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:33,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:39:34,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:34,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441278534] [2022-11-19 07:39:34,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441278534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:34,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170407707] [2022-11-19 07:39:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:34,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:34,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:34,016 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:34,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:39:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:34,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:39:34,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:39:34,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:34,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170407707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:34,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:34,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:39:34,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761620239] [2022-11-19 07:39:34,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:34,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:34,471 INFO L87 Difference]: Start difference. First operand 22344 states and 33611 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:37,002 INFO L93 Difference]: Finished difference Result 66637 states and 101840 transitions. [2022-11-19 07:39:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:37,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-11-19 07:39:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:37,327 INFO L225 Difference]: With dead ends: 66637 [2022-11-19 07:39:37,328 INFO L226 Difference]: Without dead ends: 44298 [2022-11-19 07:39:37,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:37,404 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 249 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:37,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 511 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:39:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44298 states. [2022-11-19 07:39:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44298 to 44168. [2022-11-19 07:39:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44168 states, 37635 states have (on average 1.4931579646605553) internal successors, (56195), 37764 states have internal predecessors, (56195), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-19 07:39:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44168 states to 44168 states and 66187 transitions. [2022-11-19 07:39:40,733 INFO L78 Accepts]: Start accepts. Automaton has 44168 states and 66187 transitions. Word has length 142 [2022-11-19 07:39:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:40,733 INFO L495 AbstractCegarLoop]: Abstraction has 44168 states and 66187 transitions. [2022-11-19 07:39:40,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:39:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 44168 states and 66187 transitions. [2022-11-19 07:39:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:39:40,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:40,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:40,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:41,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_743bcd49-768c-4877-8104-bfa229da1b9a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:41,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1555431359, now seen corresponding path program 1 times [2022-11-19 07:39:41,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:41,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621400552] [2022-11-19 07:39:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:41,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 07:39:42,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:42,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621400552] [2022-11-19 07:39:42,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621400552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:42,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:39:42,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:39:42,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995961769] [2022-11-19 07:39:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:42,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:39:42,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:42,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:39:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:42,042 INFO L87 Difference]: Start difference. First operand 44168 states and 66187 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:39:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:47,939 INFO L93 Difference]: Finished difference Result 155276 states and 232462 transitions. [2022-11-19 07:39:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:39:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 142 [2022-11-19 07:39:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:48,621 INFO L225 Difference]: With dead ends: 155276 [2022-11-19 07:39:48,621 INFO L226 Difference]: Without dead ends: 111114 [2022-11-19 07:39:48,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:39:48,768 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1219 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:48,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 764 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:39:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111114 states. [2022-11-19 07:39:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111114 to 86792. [2022-11-19 07:39:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86792 states, 73987 states have (on average 1.487869490586184) internal successors, (110083), 74244 states have internal predecessors, (110083), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-19 07:39:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86792 states to 86792 states and 129547 transitions. [2022-11-19 07:39:55,113 INFO L78 Accepts]: Start accepts. Automaton has 86792 states and 129547 transitions. Word has length 142 [2022-11-19 07:39:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:55,115 INFO L495 AbstractCegarLoop]: Abstraction has 86792 states and 129547 transitions. [2022-11-19 07:39:55,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:39:55,115 INFO L276 IsEmpty]: Start isEmpty. Operand 86792 states and 129547 transitions. [2022-11-19 07:39:55,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:39:55,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:55,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:55,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:39:55,318 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:55,319 INFO L85 PathProgramCache]: Analyzing trace with hash -877198779, now seen corresponding path program 1 times [2022-11-19 07:39:55,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:55,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752911261] [2022-11-19 07:39:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:55,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 07:39:56,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752911261] [2022-11-19 07:39:56,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752911261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:56,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:39:56,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:39:56,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424840287] [2022-11-19 07:39:56,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:56,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:39:56,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:39:56,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:56,109 INFO L87 Difference]: Start difference. First operand 86792 states and 129547 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:40:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:05,171 INFO L93 Difference]: Finished difference Result 238476 states and 356493 transitions. [2022-11-19 07:40:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:40:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2022-11-19 07:40:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:06,205 INFO L225 Difference]: With dead ends: 238476 [2022-11-19 07:40:06,205 INFO L226 Difference]: Without dead ends: 151690 [2022-11-19 07:40:06,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:40:06,477 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 1070 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:06,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1076 Valid, 820 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:40:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151690 states.