./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.11.cil.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_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/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_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/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_cb5f10da-5027-4c00-8ab3-c618f9b6432a/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 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 --- 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 06:55:02,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:55:02,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:55:02,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:55:02,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:55:02,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:55:02,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:55:02,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:55:02,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:55:02,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:55:02,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:55:02,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:55:02,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:55:02,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:55:02,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:55:02,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:55:02,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:55:02,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:55:02,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:55:02,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:55:02,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:55:02,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:55:02,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:55:02,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:55:02,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:55:02,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:55:02,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:55:02,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:55:02,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:55:02,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:55:02,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:55:02,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:55:02,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:55:02,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:55:02,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:55:02,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:55:02,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:55:02,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:55:02,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:55:02,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:55:02,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:55:02,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:55:02,644 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:55:02,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:55:02,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:55:02,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:55:02,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:55:02,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:55:02,646 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:55:02,647 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:55:02,647 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:55:02,647 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:55:02,648 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:55:02,648 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:55:02,648 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:55:02,649 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:55:02,649 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:55:02,649 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:55:02,650 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:55:02,650 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:55:02,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:55:02,651 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:55:02,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:55:02,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:55:02,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:55:02,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:55:02,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:55:02,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:55:02,653 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:55:02,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:55:02,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:55:02,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:55:02,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:55:02,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:55:02,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:55:02,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:55:02,655 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:55:02,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:55:02,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:55:02,656 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:55:02,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:55:02,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:55:02,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:55:02,657 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_cb5f10da-5027-4c00-8ab3-c618f9b6432a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 [2022-11-19 06:55:02,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:55:02,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:55:02,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:55:02,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:55:02,913 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:55:02,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/systemc/transmitter.11.cil.c [2022-11-19 06:55:02,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/data/a99a6e3db/ffe589d7ef4f4bbfa2e7ccf0a761bcc3/FLAG8c61de1e4 [2022-11-19 06:55:03,461 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:55:03,462 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/sv-benchmarks/c/systemc/transmitter.11.cil.c [2022-11-19 06:55:03,473 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/data/a99a6e3db/ffe589d7ef4f4bbfa2e7ccf0a761bcc3/FLAG8c61de1e4 [2022-11-19 06:55:03,829 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/data/a99a6e3db/ffe589d7ef4f4bbfa2e7ccf0a761bcc3 [2022-11-19 06:55:03,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:55:03,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:55:03,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:55:03,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:55:03,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:55:03,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:55:03" (1/1) ... [2022-11-19 06:55:03,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd3bebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:03, skipping insertion in model container [2022-11-19 06:55:03,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:55:03" (1/1) ... [2022-11-19 06:55:03,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:55:03,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:55:04,052 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_cb5f10da-5027-4c00-8ab3-c618f9b6432a/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2022-11-19 06:55:04,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:55:04,220 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:55:04,232 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_cb5f10da-5027-4c00-8ab3-c618f9b6432a/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2022-11-19 06:55:04,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:55:04,379 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:55:04,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04 WrapperNode [2022-11-19 06:55:04,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:55:04,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:55:04,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:55:04,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:55:04,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,478 INFO L138 Inliner]: procedures = 50, calls = 63, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 777 [2022-11-19 06:55:04,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:55:04,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:55:04,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:55:04,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:55:04,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,528 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:55:04,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:55:04,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:55:04,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:55:04,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (1/1) ... [2022-11-19 06:55:04,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:55:04,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:04,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:55:04,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5f10da-5027-4c00-8ab3-c618f9b6432a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:55:04,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:55:04,631 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 06:55:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 06:55:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 06:55:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 06:55:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 06:55:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 06:55:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 06:55:04,633 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 06:55:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 06:55:04,633 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 06:55:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 06:55:04,634 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 06:55:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:55:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:55:04,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:55:04,750 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:55:04,753 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:55:05,687 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:55:06,219 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:55:06,219 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-19 06:55:06,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:55:06 BoogieIcfgContainer [2022-11-19 06:55:06,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:55:06,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:55:06,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:55:06,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:55:06,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:55:03" (1/3) ... [2022-11-19 06:55:06,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507ee7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:55:06, skipping insertion in model container [2022-11-19 06:55:06,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:04" (2/3) ... [2022-11-19 06:55:06,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507ee7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:55:06, skipping insertion in model container [2022-11-19 06:55:06,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:55:06" (3/3) ... [2022-11-19 06:55:06,236 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.11.cil.c [2022-11-19 06:55:06,259 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:55:06,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:55:06,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:55:06,361 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;@a5a33f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:55:06,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:55:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-19 06:55:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:55:06,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:06,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:06,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:06,399 INFO L85 PathProgramCache]: Analyzing trace with hash 626698193, now seen corresponding path program 1 times [2022-11-19 06:55:06,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:06,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19853225] [2022-11-19 06:55:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:06,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:06,916 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 06:55:06,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:06,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19853225] [2022-11-19 06:55:06,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19853225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:06,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:06,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:55:06,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500080778] [2022-11-19 06:55:06,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:06,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:55:06,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:06,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:55:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:55:06,972 INFO L87 Difference]: Start difference. First operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 06:55:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:07,484 INFO L93 Difference]: Finished difference Result 512 states and 807 transitions. [2022-11-19 06:55:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:55:07,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 73 [2022-11-19 06:55:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:07,499 INFO L225 Difference]: With dead ends: 512 [2022-11-19 06:55:07,499 INFO L226 Difference]: Without dead ends: 338 [2022-11-19 06:55:07,504 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 06:55:07,507 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 474 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:07,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 746 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:55:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-19 06:55:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2022-11-19 06:55:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 277 states have (on average 1.51985559566787) internal successors, (421), 279 states have internal predecessors, (421), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-19 06:55:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 509 transitions. [2022-11-19 06:55:07,580 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 509 transitions. Word has length 73 [2022-11-19 06:55:07,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:07,581 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 509 transitions. [2022-11-19 06:55:07,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 06:55:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 509 transitions. [2022-11-19 06:55:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:55:07,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:07,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:07,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:55:07,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1203626834, now seen corresponding path program 1 times [2022-11-19 06:55:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:07,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285376797] [2022-11-19 06:55:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:07,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:07,869 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 06:55:07,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:07,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285376797] [2022-11-19 06:55:07,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285376797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:07,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:07,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:55:07,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141334032] [2022-11-19 06:55:07,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:07,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:55:07,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:07,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:55:07,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:07,874 INFO L87 Difference]: Start difference. First operand 334 states and 509 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:08,925 INFO L93 Difference]: Finished difference Result 1945 states and 3133 transitions. [2022-11-19 06:55:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:55:08,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2022-11-19 06:55:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:08,954 INFO L225 Difference]: With dead ends: 1945 [2022-11-19 06:55:08,954 INFO L226 Difference]: Without dead ends: 1616 [2022-11-19 06:55:08,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:55:08,970 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 1115 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:08,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 1214 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:55:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-11-19 06:55:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1580. [2022-11-19 06:55:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1327 states have (on average 1.5169555388093443) internal successors, (2013), 1335 states have internal predecessors, (2013), 192 states have call successors, (192), 60 states have call predecessors, (192), 60 states have return successors, (298), 185 states have call predecessors, (298), 192 states have call successors, (298) [2022-11-19 06:55:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2503 transitions. [2022-11-19 06:55:09,152 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2503 transitions. Word has length 73 [2022-11-19 06:55:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:09,153 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2503 transitions. [2022-11-19 06:55:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2503 transitions. [2022-11-19 06:55:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:55:09,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:09,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:09,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:55:09,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1443894163, now seen corresponding path program 1 times [2022-11-19 06:55:09,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:09,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414346505] [2022-11-19 06:55:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:09,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:09,437 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 06:55:09,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:09,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414346505] [2022-11-19 06:55:09,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414346505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:09,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:09,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:55:09,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18467815] [2022-11-19 06:55:09,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:09,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:55:09,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:09,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:55:09,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:09,441 INFO L87 Difference]: Start difference. First operand 1580 states and 2503 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:10,612 INFO L93 Difference]: Finished difference Result 6243 states and 10199 transitions. [2022-11-19 06:55:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:55:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2022-11-19 06:55:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:10,649 INFO L225 Difference]: With dead ends: 6243 [2022-11-19 06:55:10,650 INFO L226 Difference]: Without dead ends: 4668 [2022-11-19 06:55:10,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:55:10,667 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 1118 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:10,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 1226 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:55:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2022-11-19 06:55:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 4382. [2022-11-19 06:55:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 3775 states have (on average 1.5282119205298013) internal successors, (5769), 3725 states have internal predecessors, (5769), 442 states have call successors, (442), 148 states have call predecessors, (442), 164 states have return successors, (900), 509 states have call predecessors, (900), 442 states have call successors, (900) [2022-11-19 06:55:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 7111 transitions. [2022-11-19 06:55:11,032 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 7111 transitions. Word has length 73 [2022-11-19 06:55:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:11,033 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 7111 transitions. [2022-11-19 06:55:11,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 7111 transitions. [2022-11-19 06:55:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:55:11,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:11,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:11,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:55:11,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1546695410, now seen corresponding path program 1 times [2022-11-19 06:55:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:11,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652768788] [2022-11-19 06:55:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:11,172 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 06:55:11,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:11,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652768788] [2022-11-19 06:55:11,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652768788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:11,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:11,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:55:11,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026412918] [2022-11-19 06:55:11,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:11,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:55:11,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:55:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:55:11,174 INFO L87 Difference]: Start difference. First operand 4382 states and 7111 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 06:55:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:12,075 INFO L93 Difference]: Finished difference Result 13053 states and 21820 transitions. [2022-11-19 06:55:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:55:12,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 73 [2022-11-19 06:55:12,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:12,184 INFO L225 Difference]: With dead ends: 13053 [2022-11-19 06:55:12,185 INFO L226 Difference]: Without dead ends: 8676 [2022-11-19 06:55:12,210 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 06:55:12,211 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 483 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:12,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 744 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:55:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2022-11-19 06:55:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 8644. [2022-11-19 06:55:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 7457 states have (on average 1.5187072549282554) internal successors, (11325), 7364 states have internal predecessors, (11325), 858 states have call successors, (858), 296 states have call predecessors, (858), 328 states have return successors, (1738), 984 states have call predecessors, (1738), 858 states have call successors, (1738) [2022-11-19 06:55:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 13921 transitions. [2022-11-19 06:55:12,909 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 13921 transitions. Word has length 73 [2022-11-19 06:55:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:12,909 INFO L495 AbstractCegarLoop]: Abstraction has 8644 states and 13921 transitions. [2022-11-19 06:55:12,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 06:55:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 13921 transitions. [2022-11-19 06:55:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:55:12,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:12,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:12,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:55:12,913 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:12,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1315437167, now seen corresponding path program 1 times [2022-11-19 06:55:12,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:12,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898396440] [2022-11-19 06:55:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:12,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:13,043 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 06:55:13,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:13,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898396440] [2022-11-19 06:55:13,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898396440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:13,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:13,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:55:13,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962574095] [2022-11-19 06:55:13,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:13,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:55:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:55:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:13,048 INFO L87 Difference]: Start difference. First operand 8644 states and 13921 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:15,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:15,388 INFO L93 Difference]: Finished difference Result 31731 states and 53021 transitions. [2022-11-19 06:55:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:55:15,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2022-11-19 06:55:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:15,565 INFO L225 Difference]: With dead ends: 31731 [2022-11-19 06:55:15,565 INFO L226 Difference]: Without dead ends: 23092 [2022-11-19 06:55:15,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:55:15,618 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 1108 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:15,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 1220 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:55:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2022-11-19 06:55:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 21824. [2022-11-19 06:55:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21824 states, 19065 states have (on average 1.529976396538159) internal successors, (29169), 18612 states have internal predecessors, (29169), 1918 states have call successors, (1918), 696 states have call predecessors, (1918), 840 states have return successors, (4950), 2516 states have call predecessors, (4950), 1918 states have call successors, (4950) [2022-11-19 06:55:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21824 states to 21824 states and 36037 transitions. [2022-11-19 06:55:17,308 INFO L78 Accepts]: Start accepts. Automaton has 21824 states and 36037 transitions. Word has length 73 [2022-11-19 06:55:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:17,308 INFO L495 AbstractCegarLoop]: Abstraction has 21824 states and 36037 transitions. [2022-11-19 06:55:17,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 21824 states and 36037 transitions. [2022-11-19 06:55:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:55:17,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:17,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:17,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:55:17,313 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:17,313 INFO L85 PathProgramCache]: Analyzing trace with hash 824015728, now seen corresponding path program 1 times [2022-11-19 06:55:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:17,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645828773] [2022-11-19 06:55:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:17,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:17,462 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 06:55:17,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:17,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645828773] [2022-11-19 06:55:17,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645828773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:17,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:17,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:55:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935497488] [2022-11-19 06:55:17,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:17,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:55:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:55:17,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:17,466 INFO L87 Difference]: Start difference. First operand 21824 states and 36037 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:21,066 INFO L93 Difference]: Finished difference Result 78571 states and 135821 transitions. [2022-11-19 06:55:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:55:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2022-11-19 06:55:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:21,404 INFO L225 Difference]: With dead ends: 78571 [2022-11-19 06:55:21,404 INFO L226 Difference]: Without dead ends: 56752 [2022-11-19 06:55:21,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:55:21,488 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 1103 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:21,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1207 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:55:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56752 states. [2022-11-19 06:55:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56752 to 54052. [2022-11-19 06:55:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54052 states, 47601 states have (on average 1.543265897775257) internal successors, (73461), 46028 states have internal predecessors, (73461), 4298 states have call successors, (4298), 1640 states have call predecessors, (4298), 2152 states have return successors, (13986), 6384 states have call predecessors, (13986), 4298 states have call successors, (13986) [2022-11-19 06:55:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54052 states to 54052 states and 91745 transitions. [2022-11-19 06:55:26,011 INFO L78 Accepts]: Start accepts. Automaton has 54052 states and 91745 transitions. Word has length 73 [2022-11-19 06:55:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:26,012 INFO L495 AbstractCegarLoop]: Abstraction has 54052 states and 91745 transitions. [2022-11-19 06:55:26,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 54052 states and 91745 transitions. [2022-11-19 06:55:26,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:55:26,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:26,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:26,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:55:26,021 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:26,022 INFO L85 PathProgramCache]: Analyzing trace with hash -940800881, now seen corresponding path program 1 times [2022-11-19 06:55:26,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:26,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575088382] [2022-11-19 06:55:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:26,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:26,169 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 06:55:26,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:26,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575088382] [2022-11-19 06:55:26,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575088382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:26,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:26,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:55:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931698479] [2022-11-19 06:55:26,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:26,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:55:26,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:26,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:55:26,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:26,172 INFO L87 Difference]: Start difference. First operand 54052 states and 91745 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:33,814 INFO L93 Difference]: Finished difference Result 195177 states and 351170 transitions. [2022-11-19 06:55:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:55:33,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 73 [2022-11-19 06:55:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:34,909 INFO L225 Difference]: With dead ends: 195177 [2022-11-19 06:55:34,909 INFO L226 Difference]: Without dead ends: 141130 [2022-11-19 06:55:35,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:55:35,090 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 1101 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:35,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1208 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:55:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141130 states. [2022-11-19 06:55:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141130 to 134828. [2022-11-19 06:55:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134828 states, 119193 states have (on average 1.5529854941145873) internal successors, (185105), 113668 states have internal predecessors, (185105), 9994 states have call successors, (9994), 3960 states have call predecessors, (9994), 5640 states have return successors, (40894), 17200 states have call predecessors, (40894), 9994 states have call successors, (40894) [2022-11-19 06:55:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134828 states to 134828 states and 235993 transitions. [2022-11-19 06:55:45,007 INFO L78 Accepts]: Start accepts. Automaton has 134828 states and 235993 transitions. Word has length 73 [2022-11-19 06:55:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:45,008 INFO L495 AbstractCegarLoop]: Abstraction has 134828 states and 235993 transitions. [2022-11-19 06:55:45,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 06:55:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 134828 states and 235993 transitions. [2022-11-19 06:55:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 06:55:45,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:45,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:45,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:55:45,011 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:45,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:45,012 INFO L85 PathProgramCache]: Analyzing trace with hash 606133631, now seen corresponding path program 1 times [2022-11-19 06:55:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:45,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893828669] [2022-11-19 06:55:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:45,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:45,271 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 06:55:45,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:45,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893828669] [2022-11-19 06:55:45,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893828669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:45,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:45,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:55:45,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473729529] [2022-11-19 06:55:45,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:45,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:55:45,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:55:45,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:55:45,274 INFO L87 Difference]: Start difference. First operand 134828 states and 235993 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)