./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/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_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/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_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/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 a50787eee309f695181bc37c4f84940bb8fed2cb76457a2c563ef0feb29ebac8 --- 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 07:38:17,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:38:17,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:38:17,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:38:17,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:38:17,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:38:17,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:38:17,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:38:17,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:38:17,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:38:17,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:38:17,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:38:17,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:38:17,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:38:17,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:38:17,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:38:17,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:38:17,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:38:17,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:38:17,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:38:17,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:38:17,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:38:17,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:38:17,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:38:17,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:38:17,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:38:17,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:38:17,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:38:17,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:38:17,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:38:17,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:38:17,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:38:17,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:38:17,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:38:17,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:38:17,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:38:17,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:38:17,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:38:17,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:38:17,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:38:17,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:38:17,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:38:17,602 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:38:17,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:38:17,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:38:17,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:38:17,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:38:17,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:38:17,620 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:38:17,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:38:17,621 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:38:17,621 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:38:17,621 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:38:17,621 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:38:17,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:38:17,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:38:17,622 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:38:17,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:38:17,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:38:17,623 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:38:17,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:38:17,624 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:38:17,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:38:17,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:38:17,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:38:17,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:38:17,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:38:17,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:38:17,626 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:38:17,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:38:17,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:38:17,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:38:17,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:38:17,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:38:17,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:38:17,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:38:17,628 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:38:17,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:38:17,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:38:17,629 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:38:17,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:38:17,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:38:17,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:38:17,630 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_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50787eee309f695181bc37c4f84940bb8fed2cb76457a2c563ef0feb29ebac8 [2022-11-19 07:38:17,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:38:18,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:38:18,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:38:18,010 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:38:18,011 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:38:18,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c [2022-11-19 07:38:18,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/data/82acbe4d3/715dee6e11dd49c5b089397ebad08fdc/FLAG70c692df9 [2022-11-19 07:38:19,416 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:38:19,424 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c [2022-11-19 07:38:19,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/data/82acbe4d3/715dee6e11dd49c5b089397ebad08fdc/FLAG70c692df9 [2022-11-19 07:38:19,574 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/data/82acbe4d3/715dee6e11dd49c5b089397ebad08fdc [2022-11-19 07:38:19,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:38:19,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:38:19,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:38:19,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:38:19,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:38:19,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:19" (1/1) ... [2022-11-19 07:38:19,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df7f32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:19, skipping insertion in model container [2022-11-19 07:38:19,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:19" (1/1) ... [2022-11-19 07:38:19,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:38:19,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:38:22,631 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_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c[377340,377353] [2022-11-19 07:38:22,672 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_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c[383339,383352] [2022-11-19 07:38:23,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:38:23,033 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:38:24,466 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_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c[377340,377353] [2022-11-19 07:38:24,477 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_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c[383339,383352] [2022-11-19 07:38:24,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:38:24,575 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:38:24,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24 WrapperNode [2022-11-19 07:38:24,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:38:24,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:38:24,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:38:24,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:38:24,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:24,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:25,264 INFO L138 Inliner]: procedures = 60, calls = 65, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 12967 [2022-11-19 07:38:25,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:38:25,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:38:25,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:38:25,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:38:25,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:25,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:25,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:25,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:25,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:25,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:25,774 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:25,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:26,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:38:26,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:38:26,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:38:26,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:38:26,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (1/1) ... [2022-11-19 07:38:26,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:38:26,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:26,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:38:26,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:38:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:38:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:38:26,206 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:38:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:38:26,207 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:38:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:38:26,207 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:38:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:38:26,207 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:38:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:38:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:38:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:38:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:38:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:38:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:38:26,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:38:26,466 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:38:26,468 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:38:37,464 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:38:40,708 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:38:40,708 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-19 07:38:40,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:40 BoogieIcfgContainer [2022-11-19 07:38:40,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:38:40,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:38:40,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:38:40,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:38:40,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:38:19" (1/3) ... [2022-11-19 07:38:40,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d08b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:40, skipping insertion in model container [2022-11-19 07:38:40,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:24" (2/3) ... [2022-11-19 07:38:40,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d08b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:40, skipping insertion in model container [2022-11-19 07:38:40,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:40" (3/3) ... [2022-11-19 07:38:40,728 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.08.cil-1.c [2022-11-19 07:38:40,752 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:38:40,752 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:38:40,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:38:40,875 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;@5eb9dfa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:38:40,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:38:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:38:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:38:40,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:40,907 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] [2022-11-19 07:38:40,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:40,915 INFO L85 PathProgramCache]: Analyzing trace with hash -143292021, now seen corresponding path program 1 times [2022-11-19 07:38:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906763438] [2022-11-19 07:38:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:40,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:41,431 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 07:38:41,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:41,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906763438] [2022-11-19 07:38:41,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906763438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:41,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:41,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:38:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165122700] [2022-11-19 07:38:41,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:41,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:38:41,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:41,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:38:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:38:41,486 INFO L87 Difference]: Start difference. First operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 07:38:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:42,954 INFO L93 Difference]: Finished difference Result 3701 states and 7203 transitions. [2022-11-19 07:38:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:38:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 55 [2022-11-19 07:38:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:43,008 INFO L225 Difference]: With dead ends: 3701 [2022-11-19 07:38:43,013 INFO L226 Difference]: Without dead ends: 1913 [2022-11-19 07:38:43,026 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 07:38:43,033 INFO L413 NwaCegarLoop]: 3391 mSDtfsCounter, 3647 mSDsluCounter, 3309 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 6700 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:43,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3647 Valid, 6700 Invalid, 676 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 07:38:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-11-19 07:38:43,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2022-11-19 07:38:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1858 states have (on average 1.9332615715823467) internal successors, (3592), 1861 states have internal predecessors, (3592), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-19 07:38:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3672 transitions. [2022-11-19 07:38:43,206 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3672 transitions. Word has length 55 [2022-11-19 07:38:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:43,207 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 3672 transitions. [2022-11-19 07:38:43,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 07:38:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3672 transitions. [2022-11-19 07:38:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:38:43,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:43,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:38:43,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:38:43,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1774298194, now seen corresponding path program 1 times [2022-11-19 07:38:43,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:43,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892488953] [2022-11-19 07:38:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:43,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:38:43,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:43,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892488953] [2022-11-19 07:38:43,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892488953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:43,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380082929] [2022-11-19 07:38:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:43,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:43,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:43,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:43,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:38:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:43,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:43,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:38:44,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:44,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380082929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:44,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:44,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:38:44,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202877003] [2022-11-19 07:38:44,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:44,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:44,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:44,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:44,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:44,024 INFO L87 Difference]: Start difference. First operand 1912 states and 3672 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 07:38:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:44,713 INFO L93 Difference]: Finished difference Result 2437 states and 4475 transitions. [2022-11-19 07:38:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 108 [2022-11-19 07:38:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:44,729 INFO L225 Difference]: With dead ends: 2437 [2022-11-19 07:38:44,729 INFO L226 Difference]: Without dead ends: 2171 [2022-11-19 07:38:44,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 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 07:38:44,733 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:44,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3440 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:38:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-11-19 07:38:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2167. [2022-11-19 07:38:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2067 states have (on average 1.8872762457668117) internal successors, (3901), 2071 states have internal predecessors, (3901), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-19 07:38:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 4049 transitions. [2022-11-19 07:38:44,871 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 4049 transitions. Word has length 108 [2022-11-19 07:38:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:44,871 INFO L495 AbstractCegarLoop]: Abstraction has 2167 states and 4049 transitions. [2022-11-19 07:38:44,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 07:38:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 4049 transitions. [2022-11-19 07:38:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:38:44,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:44,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:38:44,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:45,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:45,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 914729458, now seen corresponding path program 1 times [2022-11-19 07:38:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:45,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622612772] [2022-11-19 07:38:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:45,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:38:45,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622612772] [2022-11-19 07:38:45,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622612772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:45,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115086677] [2022-11-19 07:38:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:45,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:45,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:45,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:45,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:38:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:45,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:45,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:38:45,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:45,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115086677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:45,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:45,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:38:45,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650979973] [2022-11-19 07:38:45,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:45,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:45,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:45,625 INFO L87 Difference]: Start difference. First operand 2167 states and 4049 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 07:38:46,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:46,299 INFO L93 Difference]: Finished difference Result 3196 states and 5616 transitions. [2022-11-19 07:38:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:46,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 108 [2022-11-19 07:38:46,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:46,320 INFO L225 Difference]: With dead ends: 3196 [2022-11-19 07:38:46,321 INFO L226 Difference]: Without dead ends: 2675 [2022-11-19 07:38:46,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 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 07:38:46,329 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 3456 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:46,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:38:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-11-19 07:38:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2669. [2022-11-19 07:38:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2479 states have (on average 1.81807180314643) internal successors, (4507), 2485 states have internal predecessors, (4507), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-11-19 07:38:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 4787 transitions. [2022-11-19 07:38:46,498 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 4787 transitions. Word has length 108 [2022-11-19 07:38:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:46,501 INFO L495 AbstractCegarLoop]: Abstraction has 2669 states and 4787 transitions. [2022-11-19 07:38:46,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 07:38:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 4787 transitions. [2022-11-19 07:38:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:38:46,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:46,516 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:38:46,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:46,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:46,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:46,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1554122670, now seen corresponding path program 1 times [2022-11-19 07:38:46,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:46,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975063419] [2022-11-19 07:38:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:46,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:38:46,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:46,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975063419] [2022-11-19 07:38:46,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975063419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:46,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391649224] [2022-11-19 07:38:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:46,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:46,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:46,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:46,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:38:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:38:47,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:47,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391649224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:47,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:47,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:38:47,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175717815] [2022-11-19 07:38:47,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:47,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:47,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:47,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:47,246 INFO L87 Difference]: Start difference. First operand 2669 states and 4787 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 07:38:47,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:47,941 INFO L93 Difference]: Finished difference Result 4690 states and 7848 transitions. [2022-11-19 07:38:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:47,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 108 [2022-11-19 07:38:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:47,966 INFO L225 Difference]: With dead ends: 4690 [2022-11-19 07:38:47,968 INFO L226 Difference]: Without dead ends: 3667 [2022-11-19 07:38:47,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 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 07:38:47,979 INFO L413 NwaCegarLoop]: 3273 mSDtfsCounter, 3453 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3438 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:47,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3438 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:38:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2022-11-19 07:38:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3657. [2022-11-19 07:38:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3291 states have (on average 1.7304770586447888) internal successors, (5695), 3301 states have internal predecessors, (5695), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-11-19 07:38:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 6231 transitions. [2022-11-19 07:38:48,188 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 6231 transitions. Word has length 108 [2022-11-19 07:38:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:48,188 INFO L495 AbstractCegarLoop]: Abstraction has 3657 states and 6231 transitions. [2022-11-19 07:38:48,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 07:38:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 6231 transitions. [2022-11-19 07:38:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:38:48,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:48,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:38:48,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 07:38:48,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:48,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:48,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1546601970, now seen corresponding path program 1 times [2022-11-19 07:38:48,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:48,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024305680] [2022-11-19 07:38:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:48,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:38:48,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:48,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024305680] [2022-11-19 07:38:48,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024305680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:48,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032541051] [2022-11-19 07:38:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:48,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:48,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:48,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:38:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:48,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:38:49,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:49,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032541051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:49,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:49,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:38:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514941459] [2022-11-19 07:38:49,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:49,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:49,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:49,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:49,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:49,012 INFO L87 Difference]: Start difference. First operand 3657 states and 6231 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 07:38:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:49,706 INFO L93 Difference]: Finished difference Result 7630 states and 12212 transitions. [2022-11-19 07:38:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:49,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 108 [2022-11-19 07:38:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:49,745 INFO L225 Difference]: With dead ends: 7630 [2022-11-19 07:38:49,745 INFO L226 Difference]: Without dead ends: 5619 [2022-11-19 07:38:49,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 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 07:38:49,759 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3441 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3441 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:49,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3441 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:38:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2022-11-19 07:38:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5601. [2022-11-19 07:38:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 4891 states have (on average 1.6403598446125536) internal successors, (8023), 4909 states have internal predecessors, (8023), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-11-19 07:38:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 9055 transitions. [2022-11-19 07:38:50,027 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 9055 transitions. Word has length 108 [2022-11-19 07:38:50,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:50,028 INFO L495 AbstractCegarLoop]: Abstraction has 5601 states and 9055 transitions. [2022-11-19 07:38:50,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 07:38:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 9055 transitions. [2022-11-19 07:38:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:38:50,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:50,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:38:50,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:50,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:50,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash -145751150, now seen corresponding path program 1 times [2022-11-19 07:38:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110237491] [2022-11-19 07:38:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:38:50,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:50,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110237491] [2022-11-19 07:38:50,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110237491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:50,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:50,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:38:50,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760460778] [2022-11-19 07:38:50,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:50,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:50,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:50,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:50,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:50,382 INFO L87 Difference]: Start difference. First operand 5601 states and 9055 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:38:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:51,174 INFO L93 Difference]: Finished difference Result 8675 states and 13712 transitions. [2022-11-19 07:38:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:51,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2022-11-19 07:38:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:51,238 INFO L225 Difference]: With dead ends: 8675 [2022-11-19 07:38:51,238 INFO L226 Difference]: Without dead ends: 6657 [2022-11-19 07:38:51,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:51,249 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 91 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6562 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:51,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6562 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:38:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2022-11-19 07:38:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 6321. [2022-11-19 07:38:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 5579 states have (on average 1.6502957519268686) internal successors, (9207), 5597 states have internal predecessors, (9207), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-19 07:38:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 10271 transitions. [2022-11-19 07:38:51,770 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 10271 transitions. Word has length 108 [2022-11-19 07:38:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:51,772 INFO L495 AbstractCegarLoop]: Abstraction has 6321 states and 10271 transitions. [2022-11-19 07:38:51,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:38:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 10271 transitions. [2022-11-19 07:38:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:38:51,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:51,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-11-19 07:38:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:38:51,794 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash -686413014, now seen corresponding path program 1 times [2022-11-19 07:38:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:51,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592007789] [2022-11-19 07:38:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:51,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:38:51,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:51,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592007789] [2022-11-19 07:38:51,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592007789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:51,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:51,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:38:51,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018594119] [2022-11-19 07:38:51,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:51,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:51,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:51,966 INFO L87 Difference]: Start difference. First operand 6321 states and 10271 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:53,099 INFO L93 Difference]: Finished difference Result 15526 states and 24292 transitions. [2022-11-19 07:38:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:53,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-19 07:38:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:53,158 INFO L225 Difference]: With dead ends: 15526 [2022-11-19 07:38:53,158 INFO L226 Difference]: Without dead ends: 10851 [2022-11-19 07:38:53,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:53,184 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3443 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:53,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:38:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2022-11-19 07:38:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10801. [2022-11-19 07:38:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10801 states, 9355 states have (on average 1.5845002672367718) internal successors, (14823), 9389 states have internal predecessors, (14823), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-11-19 07:38:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10801 states to 10801 states and 16879 transitions. [2022-11-19 07:38:53,949 INFO L78 Accepts]: Start accepts. Automaton has 10801 states and 16879 transitions. Word has length 146 [2022-11-19 07:38:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:53,950 INFO L495 AbstractCegarLoop]: Abstraction has 10801 states and 16879 transitions. [2022-11-19 07:38:53,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 10801 states and 16879 transitions. [2022-11-19 07:38:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:38:54,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:54,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-11-19 07:38:54,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:38:54,089 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1129337489, now seen corresponding path program 1 times [2022-11-19 07:38:54,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:54,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142993542] [2022-11-19 07:38:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:54,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:38:54,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:54,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142993542] [2022-11-19 07:38:54,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142993542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:54,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:54,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:38:54,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402229188] [2022-11-19 07:38:54,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:54,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:54,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:54,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:54,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:54,284 INFO L87 Difference]: Start difference. First operand 10801 states and 16879 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:55,537 INFO L93 Difference]: Finished difference Result 28822 states and 44116 transitions. [2022-11-19 07:38:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:55,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-19 07:38:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:55,636 INFO L225 Difference]: With dead ends: 28822 [2022-11-19 07:38:55,637 INFO L226 Difference]: Without dead ends: 19667 [2022-11-19 07:38:55,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:55,678 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:55,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:38:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19667 states. [2022-11-19 07:38:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19667 to 19569. [2022-11-19 07:38:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 16747 states have (on average 1.536693139069684) internal successors, (25735), 16813 states have internal predecessors, (25735), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-11-19 07:38:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 29711 transitions. [2022-11-19 07:38:56,899 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 29711 transitions. Word has length 146 [2022-11-19 07:38:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:56,900 INFO L495 AbstractCegarLoop]: Abstraction has 19569 states and 29711 transitions. [2022-11-19 07:38:56,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 29711 transitions. [2022-11-19 07:38:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:38:56,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:56,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-11-19 07:38:56,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:38:56,961 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:56,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1949678719, now seen corresponding path program 1 times [2022-11-19 07:38:56,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:56,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944439124] [2022-11-19 07:38:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:56,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:38:57,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944439124] [2022-11-19 07:38:57,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944439124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:57,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:57,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:38:57,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017019242] [2022-11-19 07:38:57,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:57,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:57,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:57,101 INFO L87 Difference]: Start difference. First operand 19569 states and 29711 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:59,221 INFO L93 Difference]: Finished difference Result 54838 states and 82580 transitions. [2022-11-19 07:38:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-19 07:38:59,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:59,418 INFO L225 Difference]: With dead ends: 54838 [2022-11-19 07:38:59,419 INFO L226 Difference]: Without dead ends: 36915 [2022-11-19 07:38:59,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:59,505 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:59,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:38:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36915 states. [2022-11-19 07:39:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36915 to 36721. [2022-11-19 07:39:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 31211 states have (on average 1.5032840985549967) internal successors, (46919), 31341 states have internal predecessors, (46919), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-11-19 07:39:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 54607 transitions. [2022-11-19 07:39:02,480 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 54607 transitions. Word has length 146 [2022-11-19 07:39:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:02,481 INFO L495 AbstractCegarLoop]: Abstraction has 36721 states and 54607 transitions. [2022-11-19 07:39:02,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:39:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 54607 transitions. [2022-11-19 07:39:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:39:02,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:02,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-11-19 07:39:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:39:02,616 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1259753847, now seen corresponding path program 1 times [2022-11-19 07:39:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:02,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282257786] [2022-11-19 07:39:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:02,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:39:02,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:02,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282257786] [2022-11-19 07:39:02,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282257786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:02,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:39:02,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:39:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226392039] [2022-11-19 07:39:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:39:02,767 INFO L87 Difference]: Start difference. First operand 36721 states and 54607 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:39:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:06,424 INFO L93 Difference]: Finished difference Result 105718 states and 157140 transitions. [2022-11-19 07:39:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:06,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-19 07:39:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:06,966 INFO L225 Difference]: With dead ends: 105718 [2022-11-19 07:39:06,966 INFO L226 Difference]: Without dead ends: 70643 [2022-11-19 07:39:07,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:39:07,078 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3450 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:07,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3427 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:39:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70643 states. [2022-11-19 07:39:10,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70643 to 70257. [2022-11-19 07:39:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70257 states, 59499 states have (on average 1.4791341030941696) internal successors, (88007), 59757 states have internal predecessors, (88007), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-11-19 07:39:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70257 states to 70257 states and 102863 transitions. [2022-11-19 07:39:11,184 INFO L78 Accepts]: Start accepts. Automaton has 70257 states and 102863 transitions. Word has length 146 [2022-11-19 07:39:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:11,185 INFO L495 AbstractCegarLoop]: Abstraction has 70257 states and 102863 transitions. [2022-11-19 07:39:11,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:39:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 70257 states and 102863 transitions. [2022-11-19 07:39:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-19 07:39:11,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:11,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:39:11,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:39:11,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1267387594, now seen corresponding path program 1 times [2022-11-19 07:39:11,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:11,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630853348] [2022-11-19 07:39:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:11,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 19 proven. 59 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:39:12,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:12,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630853348] [2022-11-19 07:39:12,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630853348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:12,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006590872] [2022-11-19 07:39:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:12,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:12,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:12,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:12,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:39:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:13,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:39:13,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:39:13,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:13,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006590872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:13,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:13,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:39:13,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258647663] [2022-11-19 07:39:13,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:13,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:13,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:13,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:13,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:39:13,267 INFO L87 Difference]: Start difference. First operand 70257 states and 102863 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:39:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:17,822 INFO L93 Difference]: Finished difference Result 133109 states and 196305 transitions. [2022-11-19 07:39:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:17,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-11-19 07:39:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:18,355 INFO L225 Difference]: With dead ends: 133109 [2022-11-19 07:39:18,355 INFO L226 Difference]: Without dead ends: 98035 [2022-11-19 07:39:18,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:39:18,458 INFO L413 NwaCegarLoop]: 3363 mSDtfsCounter, 140 mSDsluCounter, 3240 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:18,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 6603 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:39:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98035 states. [2022-11-19 07:39:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98035 to 85105. [2022-11-19 07:39:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85105 states, 73579 states have (on average 1.5196591418747196) internal successors, (111815), 73837 states have internal predecessors, (111815), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-11-19 07:39:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85105 states to 85105 states and 127439 transitions. [2022-11-19 07:39:24,479 INFO L78 Accepts]: Start accepts. Automaton has 85105 states and 127439 transitions. Word has length 167 [2022-11-19 07:39:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:24,480 INFO L495 AbstractCegarLoop]: Abstraction has 85105 states and 127439 transitions. [2022-11-19 07:39:24,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:39:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 85105 states and 127439 transitions. [2022-11-19 07:39:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-19 07:39:25,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:25,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:39:25,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:25,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:39:25,421 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash 878675298, now seen corresponding path program 2 times [2022-11-19 07:39:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:25,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627347488] [2022-11-19 07:39:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:39:25,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:25,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627347488] [2022-11-19 07:39:25,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627347488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:25,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685596044] [2022-11-19 07:39:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:39:25,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:25,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:25,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95cd1b9a-26ec-4aa9-873c-f68daff0b52e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:39:26,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:39:26,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:39:26,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:39:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 07:39:26,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:26,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685596044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:26,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:26,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:39:26,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289805236] [2022-11-19 07:39:26,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:26,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:26,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:39:26,130 INFO L87 Difference]: Start difference. First operand 85105 states and 127439 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:39:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:30,817 INFO L93 Difference]: Finished difference Result 135285 states and 205777 transitions. [2022-11-19 07:39:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:30,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-11-19 07:39:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:31,149 INFO L225 Difference]: With dead ends: 135285 [2022-11-19 07:39:31,149 INFO L226 Difference]: Without dead ends: 85363 [2022-11-19 07:39:31,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:39:31,282 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 171 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6608 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:31,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 6608 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:39:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85363 states.