./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba --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 d94a0143393d3950a5bf091072c53e220b7412d84326b758d723e55ee9dd42c8 --- 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-b5237d8 [2022-11-22 01:54:27,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:54:27,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:54:27,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:54:27,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:54:27,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:54:27,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:54:27,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:54:27,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:54:27,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:54:27,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:54:27,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:54:27,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:54:27,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:54:27,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:54:27,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:54:27,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:54:27,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:54:27,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:54:27,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:54:27,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:54:27,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:54:27,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:54:27,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:54:27,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:54:27,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:54:27,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:54:27,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:54:27,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:54:27,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:54:27,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:54:27,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:54:27,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:54:27,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:54:27,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:54:27,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:54:27,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:54:27,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:54:27,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:54:27,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:54:27,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:54:27,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:54:27,579 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:54:27,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:54:27,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:54:27,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:54:27,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:54:27,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:54:27,582 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:54:27,582 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:54:27,582 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:54:27,583 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:54:27,583 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:54:27,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:54:27,584 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:54:27,584 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:54:27,584 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:54:27,584 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:54:27,585 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:54:27,585 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:54:27,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:54:27,586 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:54:27,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:54:27,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:54:27,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:54:27,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:54:27,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:54:27,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:54:27,588 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:54:27,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:54:27,588 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:54:27,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:54:27,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:54:27,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:54:27,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:54:27,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:54:27,589 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:54:27,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:54:27,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:54:27,590 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:54:27,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:54:27,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:54:27,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:54:27,591 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_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d94a0143393d3950a5bf091072c53e220b7412d84326b758d723e55ee9dd42c8 [2022-11-22 01:54:27,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:54:27,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:54:27,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:54:27,899 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:54:27,900 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:54:27,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c [2022-11-22 01:54:30,855 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:54:31,589 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:54:31,590 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c [2022-11-22 01:54:31,638 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/data/0b4331c63/34e2a12f8bcf462aa71586d653a448b5/FLAG8e47d13c7 [2022-11-22 01:54:31,678 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/data/0b4331c63/34e2a12f8bcf462aa71586d653a448b5 [2022-11-22 01:54:31,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:54:31,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:54:31,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:54:31,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:54:31,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:54:31,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:31" (1/1) ... [2022-11-22 01:54:31,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2293d689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:31, skipping insertion in model container [2022-11-22 01:54:31,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:31" (1/1) ... [2022-11-22 01:54:31,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:54:31,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:54:34,216 WARN L237 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_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c[375709,375722] [2022-11-22 01:54:34,251 WARN L237 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_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c[383339,383352] [2022-11-22 01:54:34,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:54:34,472 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:54:35,670 WARN L237 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_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c[375709,375722] [2022-11-22 01:54:35,683 WARN L237 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_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c[383339,383352] [2022-11-22 01:54:35,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:54:35,762 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:54:35,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35 WrapperNode [2022-11-22 01:54:35,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:54:35,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:54:35,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:54:35,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:54:35,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:35,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,231 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2022-11-22 01:54:36,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:54:36,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:54:36,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:54:36,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:54:36,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:54:36,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:54:36,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:54:36,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:54:36,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (1/1) ... [2022-11-22 01:54:36,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:54:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:36,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:54:36,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:54:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:54:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 01:54:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 01:54:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 01:54:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 01:54:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 01:54:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 01:54:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 01:54:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 01:54:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 01:54:36,886 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 01:54:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 01:54:36,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 01:54:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:54:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:54:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:54:36,999 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:54:37,001 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:54:46,007 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:54:48,376 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:54:48,377 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-22 01:54:48,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:54:48 BoogieIcfgContainer [2022-11-22 01:54:48,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:54:48,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:54:48,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:54:48,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:54:48,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:54:31" (1/3) ... [2022-11-22 01:54:48,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36902bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:54:48, skipping insertion in model container [2022-11-22 01:54:48,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:35" (2/3) ... [2022-11-22 01:54:48,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36902bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:54:48, skipping insertion in model container [2022-11-22 01:54:48,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:54:48" (3/3) ... [2022-11-22 01:54:48,401 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.05.cil-1.c [2022-11-22 01:54:48,421 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:54:48,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 01:54:48,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:54:48,522 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;@4b85bb66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:54:48,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 01:54:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-22 01:54:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 01:54:48,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:48,545 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] [2022-11-22 01:54:48,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:48,551 INFO L85 PathProgramCache]: Analyzing trace with hash 211636638, now seen corresponding path program 1 times [2022-11-22 01:54:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:48,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456377451] [2022-11-22 01:54:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:48,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:54:49,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:49,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456377451] [2022-11-22 01:54:49,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456377451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:49,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:49,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:54:49,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969764493] [2022-11-22 01:54:49,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:49,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:54:49,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:49,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:54:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:54:49,058 INFO L87 Difference]: Start difference. First operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-11-22 01:54:50,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:50,161 INFO L93 Difference]: Finished difference Result 3602 states and 7035 transitions. [2022-11-22 01:54:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:54:50,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 46 [2022-11-22 01:54:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:50,185 INFO L225 Difference]: With dead ends: 3602 [2022-11-22 01:54:50,185 INFO L226 Difference]: Without dead ends: 1847 [2022-11-22 01:54:50,195 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 [2022-11-22 01:54:50,200 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3548 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:50,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3548 Valid, 6532 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:54:50,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-11-22 01:54:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1846. [2022-11-22 01:54:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1798 states have (on average 1.9443826473859844) internal successors, (3496), 1801 states have internal predecessors, (3496), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-22 01:54:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3564 transitions. [2022-11-22 01:54:50,352 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3564 transitions. Word has length 46 [2022-11-22 01:54:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:50,353 INFO L495 AbstractCegarLoop]: Abstraction has 1846 states and 3564 transitions. [2022-11-22 01:54:50,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-11-22 01:54:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3564 transitions. [2022-11-22 01:54:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 01:54:50,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:50,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:50,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:54:50,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:50,367 INFO L85 PathProgramCache]: Analyzing trace with hash -797941317, now seen corresponding path program 1 times [2022-11-22 01:54:50,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809977697] [2022-11-22 01:54:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:50,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:54:50,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:50,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809977697] [2022-11-22 01:54:50,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809977697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:54:50,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263193616] [2022-11-22 01:54:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:50,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:50,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:50,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:50,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:54:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:50,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:54:50,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:54:50,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:54:50,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263193616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:50,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:54:50,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:54:50,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794792996] [2022-11-22 01:54:50,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:50,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:54:50,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:50,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:54:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:50,843 INFO L87 Difference]: Start difference. First operand 1846 states and 3564 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2022-11-22 01:54:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:51,320 INFO L93 Difference]: Finished difference Result 2239 states and 4145 transitions. [2022-11-22 01:54:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:54:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 87 [2022-11-22 01:54:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:51,331 INFO L225 Difference]: With dead ends: 2239 [2022-11-22 01:54:51,331 INFO L226 Difference]: Without dead ends: 2039 [2022-11-22 01:54:51,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:51,334 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:51,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3344 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:54:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2022-11-22 01:54:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2035. [2022-11-22 01:54:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1947 states have (on average 1.9049820236260915) internal successors, (3709), 1951 states have internal predecessors, (3709), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-22 01:54:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3833 transitions. [2022-11-22 01:54:51,396 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3833 transitions. Word has length 87 [2022-11-22 01:54:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:51,396 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 3833 transitions. [2022-11-22 01:54:51,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2022-11-22 01:54:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3833 transitions. [2022-11-22 01:54:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 01:54:51,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:51,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:51,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:51,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:51,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:51,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1827013187, now seen corresponding path program 1 times [2022-11-22 01:54:51,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:51,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720390406] [2022-11-22 01:54:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:51,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:54:51,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:51,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720390406] [2022-11-22 01:54:51,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720390406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:54:51,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059746449] [2022-11-22 01:54:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:51,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:51,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:51,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:51,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:54:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:52,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:54:52,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:54:52,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:54:52,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059746449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:52,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:54:52,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:54:52,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039047546] [2022-11-22 01:54:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:52,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:54:52,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:54:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:52,066 INFO L87 Difference]: Start difference. First operand 2035 states and 3833 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2022-11-22 01:54:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:52,674 INFO L93 Difference]: Finished difference Result 2800 states and 4956 transitions. [2022-11-22 01:54:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:54:52,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 87 [2022-11-22 01:54:52,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:52,685 INFO L225 Difference]: With dead ends: 2800 [2022-11-22 01:54:52,686 INFO L226 Difference]: Without dead ends: 2411 [2022-11-22 01:54:52,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:52,689 INFO L413 NwaCegarLoop]: 3223 mSDtfsCounter, 3402 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 3343 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:52,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3402 Valid, 3343 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:54:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-11-22 01:54:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2405. [2022-11-22 01:54:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2239 states have (on average 1.8414470745868692) internal successors, (4123), 2245 states have internal predecessors, (4123), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-22 01:54:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4355 transitions. [2022-11-22 01:54:52,783 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4355 transitions. Word has length 87 [2022-11-22 01:54:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:52,783 INFO L495 AbstractCegarLoop]: Abstraction has 2405 states and 4355 transitions. [2022-11-22 01:54:52,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2022-11-22 01:54:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4355 transitions. [2022-11-22 01:54:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 01:54:52,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:52,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:52,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 01:54:52,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:52,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:52,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:52,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1746060283, now seen corresponding path program 1 times [2022-11-22 01:54:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:52,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476390121] [2022-11-22 01:54:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:54:53,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:53,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476390121] [2022-11-22 01:54:53,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476390121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:54:53,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310936634] [2022-11-22 01:54:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:53,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:53,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:53,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:53,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:54:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:53,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:54:53,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:54:53,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:54:53,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310936634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:53,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:54:53,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:54:53,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194135397] [2022-11-22 01:54:53,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:53,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:54:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:54:53,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:53,404 INFO L87 Difference]: Start difference. First operand 2405 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2022-11-22 01:54:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:53,893 INFO L93 Difference]: Finished difference Result 3898 states and 6528 transitions. [2022-11-22 01:54:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:54:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 87 [2022-11-22 01:54:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:53,909 INFO L225 Difference]: With dead ends: 3898 [2022-11-22 01:54:53,909 INFO L226 Difference]: Without dead ends: 3139 [2022-11-22 01:54:53,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:53,914 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 3399 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:53,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3318 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:54:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2022-11-22 01:54:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3129. [2022-11-22 01:54:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2811 states have (on average 1.7527570259694059) internal successors, (4927), 2821 states have internal predecessors, (4927), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-11-22 01:54:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 5367 transitions. [2022-11-22 01:54:54,030 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 5367 transitions. Word has length 87 [2022-11-22 01:54:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:54,030 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 5367 transitions. [2022-11-22 01:54:54,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2022-11-22 01:54:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 5367 transitions. [2022-11-22 01:54:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 01:54:54,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:54,035 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:54,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:54,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:54,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2112083581, now seen corresponding path program 1 times [2022-11-22 01:54:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:54,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684123911] [2022-11-22 01:54:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 01:54:54,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:54,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684123911] [2022-11-22 01:54:54,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684123911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:54,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:54,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:54:54,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099812448] [2022-11-22 01:54:54,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:54,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:54:54,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:54,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:54:54,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:54:54,356 INFO L87 Difference]: Start difference. First operand 3129 states and 5367 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-22 01:54:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:54,929 INFO L93 Difference]: Finished difference Result 4283 states and 7048 transitions. [2022-11-22 01:54:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:54:54,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 87 [2022-11-22 01:54:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:54,945 INFO L225 Difference]: With dead ends: 4283 [2022-11-22 01:54:54,945 INFO L226 Difference]: Without dead ends: 3521 [2022-11-22 01:54:54,949 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 [2022-11-22 01:54:54,950 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 64 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6442 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:54,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6442 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:54:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-11-22 01:54:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 3373. [2022-11-22 01:54:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3039 states have (on average 1.7476143468246133) internal successors, (5311), 3049 states have internal predecessors, (5311), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-11-22 01:54:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 5767 transitions. [2022-11-22 01:54:55,081 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 5767 transitions. Word has length 87 [2022-11-22 01:54:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:55,082 INFO L495 AbstractCegarLoop]: Abstraction has 3373 states and 5767 transitions. [2022-11-22 01:54:55,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-22 01:54:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 5767 transitions. [2022-11-22 01:54:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 01:54:55,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:55,088 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:54:55,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:54:55,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2003411347, now seen corresponding path program 1 times [2022-11-22 01:54:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:55,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782277164] [2022-11-22 01:54:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-22 01:54:55,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:55,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782277164] [2022-11-22 01:54:55,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782277164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:55,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:55,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:54:55,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694159942] [2022-11-22 01:54:55,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:55,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:54:55,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:54:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:54:55,167 INFO L87 Difference]: Start difference. First operand 3373 states and 5767 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-22 01:54:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:55,719 INFO L93 Difference]: Finished difference Result 6754 states and 10724 transitions. [2022-11-22 01:54:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:54:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 116 [2022-11-22 01:54:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:55,741 INFO L225 Difference]: With dead ends: 6754 [2022-11-22 01:54:55,741 INFO L226 Difference]: Without dead ends: 5027 [2022-11-22 01:54:55,748 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 [2022-11-22 01:54:55,749 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:55,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3320 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:54:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2022-11-22 01:54:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 5001. [2022-11-22 01:54:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 4355 states have (on average 1.6512055109070034) internal successors, (7191), 4373 states have internal predecessors, (7191), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-11-22 01:54:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 8063 transitions. [2022-11-22 01:54:56,100 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 8063 transitions. Word has length 116 [2022-11-22 01:54:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:56,103 INFO L495 AbstractCegarLoop]: Abstraction has 5001 states and 8063 transitions. [2022-11-22 01:54:56,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-22 01:54:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 8063 transitions. [2022-11-22 01:54:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 01:54:56,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:56,114 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:54:56,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:54:56,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1773267854, now seen corresponding path program 1 times [2022-11-22 01:54:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:56,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704986501] [2022-11-22 01:54:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:56,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-22 01:54:56,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:56,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704986501] [2022-11-22 01:54:56,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704986501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:56,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:56,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:54:56,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5903646] [2022-11-22 01:54:56,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:56,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:54:56,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:56,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:54:56,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:54:56,199 INFO L87 Difference]: Start difference. First operand 5001 states and 8063 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-22 01:54:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:56,873 INFO L93 Difference]: Finished difference Result 11566 states and 17572 transitions. [2022-11-22 01:54:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:54:56,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 116 [2022-11-22 01:54:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:56,936 INFO L225 Difference]: With dead ends: 11566 [2022-11-22 01:54:56,938 INFO L226 Difference]: Without dead ends: 8211 [2022-11-22 01:54:56,950 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 [2022-11-22 01:54:56,951 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 3396 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3396 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:56,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3396 Valid, 3334 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:54:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2022-11-22 01:54:57,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 8161. [2022-11-22 01:54:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 6907 states have (on average 1.5623280729694513) internal successors, (10791), 6941 states have internal predecessors, (10791), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-11-22 01:54:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 12463 transitions. [2022-11-22 01:54:57,354 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 12463 transitions. Word has length 116 [2022-11-22 01:54:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:57,355 INFO L495 AbstractCegarLoop]: Abstraction has 8161 states and 12463 transitions. [2022-11-22 01:54:57,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-22 01:54:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 12463 transitions. [2022-11-22 01:54:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-22 01:54:57,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:57,376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:57,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:54:57,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:57,377 INFO L85 PathProgramCache]: Analyzing trace with hash -704827337, now seen corresponding path program 1 times [2022-11-22 01:54:57,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:57,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778847780] [2022-11-22 01:54:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:57,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-22 01:54:57,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:57,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778847780] [2022-11-22 01:54:57,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778847780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:54:57,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893325363] [2022-11-22 01:54:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:57,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:57,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:57,507 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:57,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:54:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:54:57,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:54:57,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:54:57,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893325363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:57,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:54:57,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-22 01:54:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305119182] [2022-11-22 01:54:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:54:57,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:57,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:54:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:57,733 INFO L87 Difference]: Start difference. First operand 8161 states and 12463 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2022-11-22 01:54:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:58,722 INFO L93 Difference]: Finished difference Result 13957 states and 20833 transitions. [2022-11-22 01:54:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:54:58,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 134 [2022-11-22 01:54:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:58,770 INFO L225 Difference]: With dead ends: 13957 [2022-11-22 01:54:58,770 INFO L226 Difference]: Without dead ends: 10627 [2022-11-22 01:54:58,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:58,784 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 95 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6468 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:58,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6468 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:54:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10627 states. [2022-11-22 01:54:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10627 to 9393. [2022-11-22 01:54:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9393 states, 8043 states have (on average 1.5744125326370757) internal successors, (12663), 8077 states have internal predecessors, (12663), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-11-22 01:54:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9393 states to 9393 states and 14431 transitions. [2022-11-22 01:54:59,419 INFO L78 Accepts]: Start accepts. Automaton has 9393 states and 14431 transitions. Word has length 134 [2022-11-22 01:54:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:59,420 INFO L495 AbstractCegarLoop]: Abstraction has 9393 states and 14431 transitions. [2022-11-22 01:54:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2022-11-22 01:54:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 9393 states and 14431 transitions. [2022-11-22 01:54:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-22 01:54:59,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:59,451 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:59,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:59,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 01:54:59,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:59,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1317024008, now seen corresponding path program 2 times [2022-11-22 01:54:59,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:59,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082647225] [2022-11-22 01:54:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:59,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-22 01:55:00,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:00,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082647225] [2022-11-22 01:55:00,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082647225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:00,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980434043] [2022-11-22 01:55:00,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:55:00,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:00,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:00,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:00,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dc74b69-f0cb-4e3b-ad8e-89442b8e6f65/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:55:00,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:55:00,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:00,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:55:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:55:00,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 01:55:01,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980434043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:01,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615706987] [2022-11-22 01:55:01,081 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-22 01:55:01,081 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:55:01,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:55:01,090 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:55:01,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:55:32,309 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-11-22 01:55:32,353 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-11-22 01:55:39,705 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12