./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur --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 6b2ea308b98ca1eae9030e7a6017fcc5084f411cde9353ed6e1419a4046239c4 --- 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-38b53e6 [2022-11-25 22:20:09,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:20:09,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:20:09,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:20:09,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:20:09,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:20:09,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:20:09,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:20:09,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:20:09,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:20:09,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:20:09,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:20:09,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:20:09,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:20:09,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:20:09,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:20:09,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:20:09,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:20:09,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:20:09,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:20:09,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:20:09,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:20:09,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:20:09,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:20:09,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:20:09,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:20:09,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:20:09,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:20:09,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:20:09,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:20:09,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:20:09,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:20:09,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:20:09,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:20:09,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:20:09,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:20:09,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:20:09,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:20:09,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:20:09,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:20:09,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:20:09,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:20:09,806 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:20:09,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:20:09,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:20:09,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:20:09,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:20:09,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:20:09,809 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:20:09,809 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:20:09,809 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:20:09,809 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:20:09,810 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:20:09,810 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:20:09,810 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:20:09,810 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:20:09,811 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:20:09,811 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:20:09,811 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:20:09,811 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:20:09,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:20:09,812 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:20:09,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:20:09,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:20:09,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:20:09,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:20:09,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:20:09,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:20:09,814 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:20:09,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:20:09,815 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:20:09,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:20:09,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:20:09,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:20:09,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:20:09,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:20:09,816 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:20:09,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:20:09,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:20:09,817 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:20:09,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:20:09,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:20:09,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:20:09,818 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_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b2ea308b98ca1eae9030e7a6017fcc5084f411cde9353ed6e1419a4046239c4 [2022-11-25 22:20:10,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:20:10,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:20:10,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:20:10,177 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:20:10,178 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:20:10,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-1.c [2022-11-25 22:20:13,368 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:20:14,057 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:20:14,058 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-1.c [2022-11-25 22:20:14,101 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/data/afa05fb78/6b19662cff7d4741a9641f8be5199e27/FLAG56ca57797 [2022-11-25 22:20:14,117 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/data/afa05fb78/6b19662cff7d4741a9641f8be5199e27 [2022-11-25 22:20:14,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:20:14,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:20:14,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:20:14,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:20:14,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:20:14,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:20:14" (1/1) ... [2022-11-25 22:20:14,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74c43ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:14, skipping insertion in model container [2022-11-25 22:20:14,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:20:14" (1/1) ... [2022-11-25 22:20:14,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:20:14,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:20:16,590 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_acb621b2-dff1-436e-8d55-9683ef78e961/sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-1.c[382357,382370] [2022-11-25 22:20:16,624 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_acb621b2-dff1-436e-8d55-9683ef78e961/sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-1.c[383339,383352] [2022-11-25 22:20:16,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:20:16,855 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:20:18,085 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_acb621b2-dff1-436e-8d55-9683ef78e961/sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-1.c[382357,382370] [2022-11-25 22:20:18,089 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_acb621b2-dff1-436e-8d55-9683ef78e961/sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-1.c[383339,383352] [2022-11-25 22:20:18,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:20:18,177 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:20:18,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18 WrapperNode [2022-11-25 22:20:18,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:20:18,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:20:18,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:20:18,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:20:18,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:18,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:18,683 INFO L138 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12735 [2022-11-25 22:20:18,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:20:18,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:20:18,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:20:18,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:20:18,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:18,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:18,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:18,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:19,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:19,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:19,152 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:19,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:19,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:20:19,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:20:19,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:20:19,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:20:19,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (1/1) ... [2022-11-25 22:20:19,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:20:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:19,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:20:19,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:20:19,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:20:19,432 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-25 22:20:19,432 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-25 22:20:19,433 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-25 22:20:19,433 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-25 22:20:19,433 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-25 22:20:19,433 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-25 22:20:19,433 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-25 22:20:19,433 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-25 22:20:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-25 22:20:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-25 22:20:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-25 22:20:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-25 22:20:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:20:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:20:19,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:20:19,579 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:20:19,581 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:20:28,818 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:20:31,080 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:20:31,081 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-25 22:20:31,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:20:31 BoogieIcfgContainer [2022-11-25 22:20:31,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:20:31,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:20:31,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:20:31,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:20:31,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:20:14" (1/3) ... [2022-11-25 22:20:31,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427176a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:20:31, skipping insertion in model container [2022-11-25 22:20:31,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:20:18" (2/3) ... [2022-11-25 22:20:31,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427176a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:20:31, skipping insertion in model container [2022-11-25 22:20:31,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:20:31" (3/3) ... [2022-11-25 22:20:31,097 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.04.cil-1.c [2022-11-25 22:20:31,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:20:31,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 22:20:31,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:20:31,232 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;@7cf10dab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:20:31,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 22:20:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-25 22:20:31,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 22:20:31,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:31,258 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] [2022-11-25 22:20:31,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:31,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1233851016, now seen corresponding path program 1 times [2022-11-25 22:20:31,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752484039] [2022-11-25 22:20:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:31,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:20:31,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:31,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752484039] [2022-11-25 22:20:31,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752484039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:31,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:20:31,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:20:31,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999320867] [2022-11-25 22:20:31,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:31,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:20:31,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:31,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:20:31,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:20:31,738 INFO L87 Difference]: Start difference. First operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-11-25 22:20:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:32,816 INFO L93 Difference]: Finished difference Result 3569 states and 6979 transitions. [2022-11-25 22:20:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:20:32,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 43 [2022-11-25 22:20:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:32,846 INFO L225 Difference]: With dead ends: 3569 [2022-11-25 22:20:32,846 INFO L226 Difference]: Without dead ends: 1825 [2022-11-25 22:20:32,858 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 [2022-11-25 22:20:32,865 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3515 mSDsluCounter, 3205 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 6476 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:32,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 6476 Invalid, 612 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:20:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-11-25 22:20:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1824. [2022-11-25 22:20:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1778 states have (on average 1.9482564679415073) internal successors, (3464), 1781 states have internal predecessors, (3464), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-25 22:20:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3528 transitions. [2022-11-25 22:20:33,016 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3528 transitions. Word has length 43 [2022-11-25 22:20:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:33,017 INFO L495 AbstractCegarLoop]: Abstraction has 1824 states and 3528 transitions. [2022-11-25 22:20:33,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-11-25 22:20:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3528 transitions. [2022-11-25 22:20:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 22:20:33,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:33,023 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:33,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:20:33,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:33,024 INFO L85 PathProgramCache]: Analyzing trace with hash 173746370, now seen corresponding path program 1 times [2022-11-25 22:20:33,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:33,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692205194] [2022-11-25 22:20:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:33,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:20:33,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692205194] [2022-11-25 22:20:33,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692205194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:33,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992170886] [2022-11-25 22:20:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:33,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:33,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:33,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:33,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:20:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:20:33,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:20:33,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:20:33,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992170886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:33,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:20:33,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:20:33,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188427736] [2022-11-25 22:20:33,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:33,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:20:33,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:20:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:33,648 INFO L87 Difference]: Start difference. First operand 1824 states and 3528 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2022-11-25 22:20:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:34,167 INFO L93 Difference]: Finished difference Result 2173 states and 4035 transitions. [2022-11-25 22:20:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:20:34,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 80 [2022-11-25 22:20:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:34,185 INFO L225 Difference]: With dead ends: 2173 [2022-11-25 22:20:34,185 INFO L226 Difference]: Without dead ends: 1995 [2022-11-25 22:20:34,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:34,189 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3384 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3384 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:34,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3384 Valid, 3312 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:20:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-25 22:20:34,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1991. [2022-11-25 22:20:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1907 states have (on average 1.9113791295228106) internal successors, (3645), 1911 states have internal predecessors, (3645), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-25 22:20:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3761 transitions. [2022-11-25 22:20:34,273 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3761 transitions. Word has length 80 [2022-11-25 22:20:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:34,274 INFO L495 AbstractCegarLoop]: Abstraction has 1991 states and 3761 transitions. [2022-11-25 22:20:34,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2022-11-25 22:20:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3761 transitions. [2022-11-25 22:20:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 22:20:34,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:34,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:34,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 22:20:34,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:34,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:34,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:34,484 INFO L85 PathProgramCache]: Analyzing trace with hash 693530786, now seen corresponding path program 1 times [2022-11-25 22:20:34,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:34,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192537589] [2022-11-25 22:20:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:34,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:20:34,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:34,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192537589] [2022-11-25 22:20:34,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192537589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:34,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187130522] [2022-11-25 22:20:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:34,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:34,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:34,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:34,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:20:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:34,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:20:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 22:20:34,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:20:34,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187130522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:34,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:20:34,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:20:34,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310763833] [2022-11-25 22:20:34,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:34,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:20:34,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:20:34,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:34,851 INFO L87 Difference]: Start difference. First operand 1991 states and 3761 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-25 22:20:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:35,348 INFO L93 Difference]: Finished difference Result 2668 states and 4736 transitions. [2022-11-25 22:20:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:20:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 80 [2022-11-25 22:20:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:35,363 INFO L225 Difference]: With dead ends: 2668 [2022-11-25 22:20:35,363 INFO L226 Difference]: Without dead ends: 2323 [2022-11-25 22:20:35,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:35,368 INFO L413 NwaCegarLoop]: 3182 mSDtfsCounter, 3381 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3381 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:35,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3381 Valid, 3287 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:20:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2022-11-25 22:20:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2317. [2022-11-25 22:20:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2159 states have (on average 1.8503937007874016) internal successors, (3995), 2165 states have internal predecessors, (3995), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-25 22:20:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 4211 transitions. [2022-11-25 22:20:35,466 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 4211 transitions. Word has length 80 [2022-11-25 22:20:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:35,467 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 4211 transitions. [2022-11-25 22:20:35,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-25 22:20:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 4211 transitions. [2022-11-25 22:20:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 22:20:35,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:35,472 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:35,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:35,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 22:20:35,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:35,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1409496258, now seen corresponding path program 1 times [2022-11-25 22:20:35,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:35,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313215527] [2022-11-25 22:20:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:35,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 22:20:35,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:35,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313215527] [2022-11-25 22:20:35,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313215527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:35,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:20:35,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:20:35,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679041857] [2022-11-25 22:20:35,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:35,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:20:35,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:20:35,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:20:35,860 INFO L87 Difference]: Start difference. First operand 2317 states and 4211 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-25 22:20:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:36,532 INFO L93 Difference]: Finished difference Result 2839 states and 4960 transitions. [2022-11-25 22:20:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:20:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 80 [2022-11-25 22:20:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:36,544 INFO L225 Difference]: With dead ends: 2839 [2022-11-25 22:20:36,545 INFO L226 Difference]: Without dead ends: 2493 [2022-11-25 22:20:36,547 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 [2022-11-25 22:20:36,548 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 55 mSDsluCounter, 3174 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:36,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6402 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:20:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-11-25 22:20:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2421. [2022-11-25 22:20:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2255 states have (on average 1.8425720620842572) internal successors, (4155), 2261 states have internal predecessors, (4155), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-25 22:20:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 4379 transitions. [2022-11-25 22:20:36,638 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 4379 transitions. Word has length 80 [2022-11-25 22:20:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:36,639 INFO L495 AbstractCegarLoop]: Abstraction has 2421 states and 4379 transitions. [2022-11-25 22:20:36,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-25 22:20:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 4379 transitions. [2022-11-25 22:20:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-25 22:20:36,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:36,643 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:20:36,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:20:36,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2061880977, now seen corresponding path program 1 times [2022-11-25 22:20:36,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:36,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377565376] [2022-11-25 22:20:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:36,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-25 22:20:36,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:36,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377565376] [2022-11-25 22:20:36,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377565376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:36,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:20:36,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:20:36,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853326376] [2022-11-25 22:20:36,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:36,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:20:36,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:36,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:20:36,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:20:36,728 INFO L87 Difference]: Start difference. First operand 2421 states and 4379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-25 22:20:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:37,261 INFO L93 Difference]: Finished difference Result 3934 states and 6568 transitions. [2022-11-25 22:20:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:20:37,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 106 [2022-11-25 22:20:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:37,276 INFO L225 Difference]: With dead ends: 3934 [2022-11-25 22:20:37,276 INFO L226 Difference]: Without dead ends: 3159 [2022-11-25 22:20:37,280 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 [2022-11-25 22:20:37,281 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 3375 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3375 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:37,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3375 Valid, 3294 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:20:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-11-25 22:20:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3145. [2022-11-25 22:20:37,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 2827 states have (on average 1.7541563494870889) internal successors, (4959), 2837 states have internal predecessors, (4959), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-25 22:20:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5383 transitions. [2022-11-25 22:20:37,404 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5383 transitions. Word has length 106 [2022-11-25 22:20:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:37,404 INFO L495 AbstractCegarLoop]: Abstraction has 3145 states and 5383 transitions. [2022-11-25 22:20:37,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-25 22:20:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5383 transitions. [2022-11-25 22:20:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-25 22:20:37,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:37,410 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:20:37,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:20:37,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash 633103465, now seen corresponding path program 1 times [2022-11-25 22:20:37,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:37,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868419048] [2022-11-25 22:20:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:37,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-25 22:20:37,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:37,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868419048] [2022-11-25 22:20:37,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868419048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:37,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:20:37,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:20:37,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171960836] [2022-11-25 22:20:37,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:37,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:20:37,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:37,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:20:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:20:37,488 INFO L87 Difference]: Start difference. First operand 3145 states and 5383 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-25 22:20:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:38,071 INFO L93 Difference]: Finished difference Result 6070 states and 9556 transitions. [2022-11-25 22:20:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:20:38,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 106 [2022-11-25 22:20:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:38,093 INFO L225 Difference]: With dead ends: 6070 [2022-11-25 22:20:38,093 INFO L226 Difference]: Without dead ends: 4571 [2022-11-25 22:20:38,100 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 [2022-11-25 22:20:38,101 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3378 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3378 SdHoareTripleChecker+Valid, 3292 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:38,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3378 Valid, 3292 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:20:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2022-11-25 22:20:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4545. [2022-11-25 22:20:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 3931 states have (on average 1.6502162299669296) internal successors, (6487), 3949 states have internal predecessors, (6487), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-25 22:20:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 7295 transitions. [2022-11-25 22:20:38,299 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 7295 transitions. Word has length 106 [2022-11-25 22:20:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:38,300 INFO L495 AbstractCegarLoop]: Abstraction has 4545 states and 7295 transitions. [2022-11-25 22:20:38,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-25 22:20:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 7295 transitions. [2022-11-25 22:20:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 22:20:38,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:38,311 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:20:38,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:20:38,311 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash 105973950, now seen corresponding path program 1 times [2022-11-25 22:20:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:38,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023813478] [2022-11-25 22:20:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 22:20:38,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023813478] [2022-11-25 22:20:38,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023813478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251954589] [2022-11-25 22:20:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:38,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:38,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:38,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:38,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:20:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:38,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:20:38,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:20:38,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:20:38,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251954589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:38,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:20:38,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 22:20:38,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461575879] [2022-11-25 22:20:38,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:20:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:20:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:38,660 INFO L87 Difference]: Start difference. First operand 4545 states and 7295 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-25 22:20:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:39,526 INFO L93 Difference]: Finished difference Result 6981 states and 10769 transitions. [2022-11-25 22:20:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:20:39,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-11-25 22:20:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:39,570 INFO L225 Difference]: With dead ends: 6981 [2022-11-25 22:20:39,570 INFO L226 Difference]: Without dead ends: 5495 [2022-11-25 22:20:39,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:39,577 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 68 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:39,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6410 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:20:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-11-25 22:20:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5053. [2022-11-25 22:20:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 4391 states have (on average 1.6467774994306537) internal successors, (7231), 4409 states have internal predecessors, (7231), 428 states have call successors, (428), 232 states have call predecessors, (428), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2022-11-25 22:20:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 8087 transitions. [2022-11-25 22:20:39,817 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 8087 transitions. Word has length 120 [2022-11-25 22:20:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:39,818 INFO L495 AbstractCegarLoop]: Abstraction has 5053 states and 8087 transitions. [2022-11-25 22:20:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-25 22:20:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 8087 transitions. [2022-11-25 22:20:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 22:20:39,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:39,833 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:20:39,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:40,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:40,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash 855873778, now seen corresponding path program 1 times [2022-11-25 22:20:40,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:40,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340282986] [2022-11-25 22:20:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:40,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 22:20:40,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:40,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340282986] [2022-11-25 22:20:40,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340282986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:40,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515985440] [2022-11-25 22:20:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:40,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:40,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:40,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:40,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:20:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:40,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:20:40,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:20:40,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:20:40,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515985440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:40,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:20:40,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 22:20:40,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912365102] [2022-11-25 22:20:40,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:40,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:20:40,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:20:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:40,406 INFO L87 Difference]: Start difference. First operand 5053 states and 8087 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-25 22:20:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:41,116 INFO L93 Difference]: Finished difference Result 8017 states and 12365 transitions. [2022-11-25 22:20:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:20:41,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-11-25 22:20:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:41,144 INFO L225 Difference]: With dead ends: 8017 [2022-11-25 22:20:41,144 INFO L226 Difference]: Without dead ends: 6271 [2022-11-25 22:20:41,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:41,152 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 74 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6423 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:41,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 6423 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:20:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2022-11-25 22:20:41,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 5773. [2022-11-25 22:20:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5773 states, 5039 states have (on average 1.6398094860091288) internal successors, (8263), 5057 states have internal predecessors, (8263), 464 states have call successors, (464), 268 states have call predecessors, (464), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2022-11-25 22:20:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 9191 transitions. [2022-11-25 22:20:41,420 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 9191 transitions. Word has length 120 [2022-11-25 22:20:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:41,421 INFO L495 AbstractCegarLoop]: Abstraction has 5773 states and 9191 transitions. [2022-11-25 22:20:41,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-25 22:20:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 9191 transitions. [2022-11-25 22:20:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 22:20:41,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:41,436 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, 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] [2022-11-25 22:20:41,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 22:20:41,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:41,643 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:41,643 INFO L85 PathProgramCache]: Analyzing trace with hash -989403653, now seen corresponding path program 1 times [2022-11-25 22:20:41,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:41,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71957224] [2022-11-25 22:20:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:41,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:20:41,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71957224] [2022-11-25 22:20:41,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71957224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:41,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824133033] [2022-11-25 22:20:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:41,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:41,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:41,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:20:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:20:41,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:20:41,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:20:41,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824133033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:41,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:20:41,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 22:20:41,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732801316] [2022-11-25 22:20:41,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:41,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:20:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:20:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:41,999 INFO L87 Difference]: Start difference. First operand 5773 states and 9191 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-25 22:20:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:42,898 INFO L93 Difference]: Finished difference Result 9513 states and 14663 transitions. [2022-11-25 22:20:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:20:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-11-25 22:20:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:42,924 INFO L225 Difference]: With dead ends: 9513 [2022-11-25 22:20:42,924 INFO L226 Difference]: Without dead ends: 7371 [2022-11-25 22:20:42,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:42,932 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 80 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6428 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:42,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 6428 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:20:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7371 states. [2022-11-25 22:20:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7371 to 6817. [2022-11-25 22:20:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6817 states, 5975 states have (on average 1.6299581589958159) internal successors, (9739), 5993 states have internal predecessors, (9739), 518 states have call successors, (518), 322 states have call predecessors, (518), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2022-11-25 22:20:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6817 states to 6817 states and 10775 transitions. [2022-11-25 22:20:43,253 INFO L78 Accepts]: Start accepts. Automaton has 6817 states and 10775 transitions. Word has length 120 [2022-11-25 22:20:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:43,254 INFO L495 AbstractCegarLoop]: Abstraction has 6817 states and 10775 transitions. [2022-11-25 22:20:43,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-25 22:20:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6817 states and 10775 transitions. [2022-11-25 22:20:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 22:20:43,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:43,269 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, 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] [2022-11-25 22:20:43,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:43,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:43,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:43,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1738862312, now seen corresponding path program 1 times [2022-11-25 22:20:43,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:43,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610237297] [2022-11-25 22:20:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:43,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:20:43,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:43,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610237297] [2022-11-25 22:20:43,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610237297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:43,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968243486] [2022-11-25 22:20:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:43,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:43,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:43,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:20:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:43,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:20:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:20:43,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:20:43,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968243486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:43,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:20:43,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 22:20:43,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405798340] [2022-11-25 22:20:43,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:43,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:20:43,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:20:43,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:43,810 INFO L87 Difference]: Start difference. First operand 6817 states and 10775 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-25 22:20:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:44,580 INFO L93 Difference]: Finished difference Result 11379 states and 17534 transitions. [2022-11-25 22:20:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:20:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-11-25 22:20:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:44,611 INFO L225 Difference]: With dead ends: 11379 [2022-11-25 22:20:44,611 INFO L226 Difference]: Without dead ends: 8688 [2022-11-25 22:20:44,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:20:44,622 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 62 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:44,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6413 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:20:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8688 states. [2022-11-25 22:20:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8688 to 8302. [2022-11-25 22:20:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 7298 states have (on average 1.6156481227733626) internal successors, (11791), 7316 states have internal predecessors, (11791), 599 states have call successors, (599), 403 states have call predecessors, (599), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2022-11-25 22:20:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 12989 transitions. [2022-11-25 22:20:45,172 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 12989 transitions. Word has length 120 [2022-11-25 22:20:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:45,173 INFO L495 AbstractCegarLoop]: Abstraction has 8302 states and 12989 transitions. [2022-11-25 22:20:45,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-25 22:20:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 12989 transitions. [2022-11-25 22:20:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 22:20:45,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:45,196 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:20:45,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:45,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:20:45,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash -473422369, now seen corresponding path program 2 times [2022-11-25 22:20:45,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:45,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788144188] [2022-11-25 22:20:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 22:20:45,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:45,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788144188] [2022-11-25 22:20:45,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788144188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:45,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682707420] [2022-11-25 22:20:45,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:20:45,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:45,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:45,794 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:45,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:20:45,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:20:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:20:45,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 22:20:45,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:20:46,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 22:20:46,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682707420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:46,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2110654648] [2022-11-25 22:20:46,757 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-25 22:20:46,757 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:46,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:46,769 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:46,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:53,850 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 143 for LOIs [2022-11-25 22:20:53,904 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-25 22:20:54,327 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-25 22:23:31,498 WARN L233 SmtUtils]: Spent 2.60m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-25 22:26:06,577 WARN L233 SmtUtils]: Spent 2.58m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-25 22:26:06,614 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 143 for LOIs [2022-11-25 22:26:06,641 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 123 for LOIs [2022-11-25 22:26:06,648 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 125 for LOIs [2022-11-25 22:26:06,713 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 121 for LOIs [2022-11-25 22:26:07,021 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 119 for LOIs [2022-11-25 22:26:07,531 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:59,197 WARN L233 SmtUtils]: Spent 40.26s on a formula simplification. DAG size of input: 1180 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:11,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130250#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ ~local~0 4))) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 |#StackHeapBarrier|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-11-25 22:27:11,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:11,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:27:11,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-11-25 22:27:11,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781449709] [2022-11-25 22:27:11,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:11,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:27:11,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:27:11,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=3353, Unknown=0, NotChecked=0, Total=3782 [2022-11-25 22:27:11,164 INFO L87 Difference]: Start difference. First operand 8302 states and 12989 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-25 22:27:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:14,738 INFO L93 Difference]: Finished difference Result 23158 states and 34238 transitions. [2022-11-25 22:27:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 22:27:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 120 [2022-11-25 22:27:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:14,824 INFO L225 Difference]: With dead ends: 23158 [2022-11-25 22:27:14,824 INFO L226 Difference]: Without dead ends: 16503 [2022-11-25 22:27:14,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 323 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 64.1s TimeCoverageRelationStatistics Valid=972, Invalid=7038, Unknown=0, NotChecked=0, Total=8010 [2022-11-25 22:27:14,857 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 11314 mSDsluCounter, 15974 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11314 SdHoareTripleChecker+Valid, 19217 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:14,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11314 Valid, 19217 Invalid, 2445 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 22:27:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16503 states. [2022-11-25 22:27:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16503 to 14397. [2022-11-25 22:27:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14397 states, 12347 states have (on average 1.515428849113145) internal successors, (18711), 12373 states have internal predecessors, (18711), 1212 states have call successors, (1212), 836 states have call predecessors, (1212), 836 states have return successors, (1212), 1188 states have call predecessors, (1212), 1212 states have call successors, (1212) [2022-11-25 22:27:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14397 states to 14397 states and 21135 transitions. [2022-11-25 22:27:16,012 INFO L78 Accepts]: Start accepts. Automaton has 14397 states and 21135 transitions. Word has length 120 [2022-11-25 22:27:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:16,013 INFO L495 AbstractCegarLoop]: Abstraction has 14397 states and 21135 transitions. [2022-11-25 22:27:16,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-25 22:27:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 14397 states and 21135 transitions. [2022-11-25 22:27:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-25 22:27:16,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:16,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:16,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:16,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 22:27:16,257 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:16,258 INFO L85 PathProgramCache]: Analyzing trace with hash -875242485, now seen corresponding path program 1 times [2022-11-25 22:27:16,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:16,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420004098] [2022-11-25 22:27:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:16,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 22:27:16,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:16,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420004098] [2022-11-25 22:27:16,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420004098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:16,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37789191] [2022-11-25 22:27:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:16,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:16,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:16,622 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:16,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:27:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:16,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:27:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:27:16,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:16,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37789191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:16,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:16,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 22:27:16,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612316157] [2022-11-25 22:27:16,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:16,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:16,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:16,878 INFO L87 Difference]: Start difference. First operand 14397 states and 21135 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-11-25 22:27:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:18,300 INFO L93 Difference]: Finished difference Result 23617 states and 34470 transitions. [2022-11-25 22:27:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:18,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 121 [2022-11-25 22:27:18,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:18,369 INFO L225 Difference]: With dead ends: 23617 [2022-11-25 22:27:18,369 INFO L226 Difference]: Without dead ends: 14423 [2022-11-25 22:27:18,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:18,402 INFO L413 NwaCegarLoop]: 3251 mSDtfsCounter, 108 mSDsluCounter, 3162 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:18,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 6413 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:27:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14423 states. [2022-11-25 22:27:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14423 to 14229. [2022-11-25 22:27:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14229 states, 12179 states have (on average 1.4995484029887511) internal successors, (18263), 12205 states have internal predecessors, (18263), 1212 states have call successors, (1212), 836 states have call predecessors, (1212), 836 states have return successors, (1212), 1188 states have call predecessors, (1212), 1212 states have call successors, (1212) [2022-11-25 22:27:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14229 states to 14229 states and 20687 transitions. [2022-11-25 22:27:19,245 INFO L78 Accepts]: Start accepts. Automaton has 14229 states and 20687 transitions. Word has length 121 [2022-11-25 22:27:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:19,246 INFO L495 AbstractCegarLoop]: Abstraction has 14229 states and 20687 transitions. [2022-11-25 22:27:19,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-11-25 22:27:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 14229 states and 20687 transitions. [2022-11-25 22:27:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-25 22:27:19,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:19,270 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:19,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:19,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:19,477 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash -762886293, now seen corresponding path program 1 times [2022-11-25 22:27:19,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:19,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016739376] [2022-11-25 22:27:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:19,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 22:27:19,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:19,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016739376] [2022-11-25 22:27:19,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016739376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:19,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591044990] [2022-11-25 22:27:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:19,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:19,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:19,869 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:19,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:27:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:20,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:27:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 22:27:20,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:20,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591044990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:20,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:20,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 22:27:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133860090] [2022-11-25 22:27:20,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:20,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:20,115 INFO L87 Difference]: Start difference. First operand 14229 states and 20687 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:27:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:21,227 INFO L93 Difference]: Finished difference Result 23244 states and 33370 transitions. [2022-11-25 22:27:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:21,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-11-25 22:27:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:21,292 INFO L225 Difference]: With dead ends: 23244 [2022-11-25 22:27:21,292 INFO L226 Difference]: Without dead ends: 14779 [2022-11-25 22:27:21,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:21,321 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 3387 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:21,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 3214 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:27:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14779 states. [2022-11-25 22:27:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14779 to 14779. [2022-11-25 22:27:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 12661 states have (on average 1.4855856567411736) internal successors, (18809), 12687 states have internal predecessors, (18809), 1234 states have call successors, (1234), 882 states have call predecessors, (1234), 882 states have return successors, (1234), 1210 states have call predecessors, (1234), 1234 states have call successors, (1234) [2022-11-25 22:27:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 21277 transitions. [2022-11-25 22:27:22,257 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 21277 transitions. Word has length 121 [2022-11-25 22:27:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:22,258 INFO L495 AbstractCegarLoop]: Abstraction has 14779 states and 21277 transitions. [2022-11-25 22:27:22,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:27:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 21277 transitions. [2022-11-25 22:27:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-25 22:27:22,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:22,284 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:22,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:22,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 22:27:22,491 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2058978408, now seen corresponding path program 1 times [2022-11-25 22:27:22,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:22,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563300010] [2022-11-25 22:27:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 22:27:22,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563300010] [2022-11-25 22:27:22,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563300010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:22,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983004104] [2022-11-25 22:27:22,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:22,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:22,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:22,893 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:22,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:27:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:23,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:27:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 22:27:23,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:23,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983004104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:23,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:23,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-25 22:27:23,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116869850] [2022-11-25 22:27:23,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:23,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:27:23,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:27:23,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:27:23,245 INFO L87 Difference]: Start difference. First operand 14779 states and 21277 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:27:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:25,649 INFO L93 Difference]: Finished difference Result 32795 states and 45831 transitions. [2022-11-25 22:27:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:27:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 122 [2022-11-25 22:27:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:25,722 INFO L225 Difference]: With dead ends: 32795 [2022-11-25 22:27:25,722 INFO L226 Difference]: Without dead ends: 19663 [2022-11-25 22:27:25,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:27:25,756 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 3594 mSDsluCounter, 6295 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3607 SdHoareTripleChecker+Valid, 9476 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:25,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3607 Valid, 9476 Invalid, 891 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [107 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:27:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19663 states. [2022-11-25 22:27:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19663 to 19661. [2022-11-25 22:27:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19661 states, 16655 states have (on average 1.4428700090063045) internal successors, (24031), 16693 states have internal predecessors, (24031), 1756 states have call successors, (1756), 1248 states have call predecessors, (1756), 1248 states have return successors, (1756), 1720 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-11-25 22:27:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19661 states to 19661 states and 27543 transitions. [2022-11-25 22:27:27,160 INFO L78 Accepts]: Start accepts. Automaton has 19661 states and 27543 transitions. Word has length 122 [2022-11-25 22:27:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:27,160 INFO L495 AbstractCegarLoop]: Abstraction has 19661 states and 27543 transitions. [2022-11-25 22:27:27,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:27:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 19661 states and 27543 transitions. [2022-11-25 22:27:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 22:27:27,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:27,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:27,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:27,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 22:27:27,389 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:27,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1043986163, now seen corresponding path program 1 times [2022-11-25 22:27:27,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:27,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318388427] [2022-11-25 22:27:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:27,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 22:27:27,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:27,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318388427] [2022-11-25 22:27:27,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318388427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:27,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452280374] [2022-11-25 22:27:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:27,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:27,657 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:27,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:27:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:27,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:27:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:27:27,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:27,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452280374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:27,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:27,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 22:27:27,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767526591] [2022-11-25 22:27:27,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:27,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:27,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:27,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:27,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:27,872 INFO L87 Difference]: Start difference. First operand 19661 states and 27543 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2022-11-25 22:27:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:29,410 INFO L93 Difference]: Finished difference Result 32603 states and 45621 transitions. [2022-11-25 22:27:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:29,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 125 [2022-11-25 22:27:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:29,475 INFO L225 Difference]: With dead ends: 32603 [2022-11-25 22:27:29,475 INFO L226 Difference]: Without dead ends: 19699 [2022-11-25 22:27:29,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:29,497 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 101 mSDsluCounter, 3161 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:29,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 6415 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:27:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19699 states. [2022-11-25 22:27:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19699 to 19445. [2022-11-25 22:27:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19445 states, 16439 states have (on average 1.4238700650891174) internal successors, (23407), 16477 states have internal predecessors, (23407), 1756 states have call successors, (1756), 1248 states have call predecessors, (1756), 1248 states have return successors, (1756), 1720 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-11-25 22:27:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19445 states to 19445 states and 26919 transitions. [2022-11-25 22:27:30,869 INFO L78 Accepts]: Start accepts. Automaton has 19445 states and 26919 transitions. Word has length 125 [2022-11-25 22:27:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:30,869 INFO L495 AbstractCegarLoop]: Abstraction has 19445 states and 26919 transitions. [2022-11-25 22:27:30,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2022-11-25 22:27:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 19445 states and 26919 transitions. [2022-11-25 22:27:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 22:27:30,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:30,890 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:30,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:31,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:27:31,096 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:31,097 INFO L85 PathProgramCache]: Analyzing trace with hash 395521261, now seen corresponding path program 1 times [2022-11-25 22:27:31,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:31,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199130837] [2022-11-25 22:27:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:31,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 22:27:31,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:31,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199130837] [2022-11-25 22:27:31,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199130837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:31,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19151861] [2022-11-25 22:27:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:31,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:31,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:31,330 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:31,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:27:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:31,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:27:31,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 22:27:31,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:31,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19151861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:31,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:31,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-25 22:27:31,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805584086] [2022-11-25 22:27:31,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:31,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:27:31,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:31,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:27:31,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:27:31,538 INFO L87 Difference]: Start difference. First operand 19445 states and 26919 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 22:27:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:32,967 INFO L93 Difference]: Finished difference Result 28427 states and 38917 transitions. [2022-11-25 22:27:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:27:32,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2022-11-25 22:27:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:33,034 INFO L225 Difference]: With dead ends: 28427 [2022-11-25 22:27:33,034 INFO L226 Difference]: Without dead ends: 20213 [2022-11-25 22:27:33,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:27:33,056 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 3393 mSDsluCounter, 3333 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 6575 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:33,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 6575 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:27:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20213 states. [2022-11-25 22:27:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20213 to 19842. [2022-11-25 22:27:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19842 states, 16775 states have (on average 1.4193144560357676) internal successors, (23809), 16837 states have internal predecessors, (23809), 1764 states have call successors, (1764), 1253 states have call predecessors, (1764), 1301 states have return successors, (1812), 1752 states have call predecessors, (1812), 1764 states have call successors, (1812) [2022-11-25 22:27:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19842 states to 19842 states and 27385 transitions. [2022-11-25 22:27:34,481 INFO L78 Accepts]: Start accepts. Automaton has 19842 states and 27385 transitions. Word has length 125 [2022-11-25 22:27:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:34,482 INFO L495 AbstractCegarLoop]: Abstraction has 19842 states and 27385 transitions. [2022-11-25 22:27:34,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 22:27:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 19842 states and 27385 transitions. [2022-11-25 22:27:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-25 22:27:34,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:34,498 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-25 22:27:34,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 22:27:34,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 22:27:34,705 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:34,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:34,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1250160964, now seen corresponding path program 1 times [2022-11-25 22:27:34,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:34,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173897615] [2022-11-25 22:27:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:34,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 22:27:34,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:34,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173897615] [2022-11-25 22:27:34,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173897615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:34,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334387443] [2022-11-25 22:27:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:34,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:34,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:34,979 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:35,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:27:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:35,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:27:35,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:27:35,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:35,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334387443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:35,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:35,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 22:27:35,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298210722] [2022-11-25 22:27:35,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:35,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:35,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:35,173 INFO L87 Difference]: Start difference. First operand 19842 states and 27385 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:27:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:36,478 INFO L93 Difference]: Finished difference Result 27584 states and 37811 transitions. [2022-11-25 22:27:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2022-11-25 22:27:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:36,536 INFO L225 Difference]: With dead ends: 27584 [2022-11-25 22:27:36,536 INFO L226 Difference]: Without dead ends: 18818 [2022-11-25 22:27:36,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:36,556 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 28 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6351 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:36,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6351 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:27:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18818 states. [2022-11-25 22:27:37,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18818 to 18190. [2022-11-25 22:27:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18190 states, 15339 states have (on average 1.42812438881283) internal successors, (21906), 15365 states have internal predecessors, (21906), 1680 states have call successors, (1680), 1169 states have call predecessors, (1680), 1169 states have return successors, (1680), 1656 states have call predecessors, (1680), 1680 states have call successors, (1680) [2022-11-25 22:27:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18190 states to 18190 states and 25266 transitions. [2022-11-25 22:27:37,678 INFO L78 Accepts]: Start accepts. Automaton has 18190 states and 25266 transitions. Word has length 126 [2022-11-25 22:27:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:37,679 INFO L495 AbstractCegarLoop]: Abstraction has 18190 states and 25266 transitions. [2022-11-25 22:27:37,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:27:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 18190 states and 25266 transitions. [2022-11-25 22:27:37,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-25 22:27:37,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:37,695 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-25 22:27:37,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:37,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 22:27:37,901 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash 662742961, now seen corresponding path program 1 times [2022-11-25 22:27:37,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:37,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316829818] [2022-11-25 22:27:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:37,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 22:27:38,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:38,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316829818] [2022-11-25 22:27:38,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316829818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:38,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126166028] [2022-11-25 22:27:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:38,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:38,131 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:38,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:27:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:38,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:27:38,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 22:27:38,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:38,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126166028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:38,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:38,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-25 22:27:38,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202686973] [2022-11-25 22:27:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:27:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:27:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:38,389 INFO L87 Difference]: Start difference. First operand 18190 states and 25266 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:27:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:40,614 INFO L93 Difference]: Finished difference Result 40841 states and 55172 transitions. [2022-11-25 22:27:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:27:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-25 22:27:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:40,658 INFO L225 Difference]: With dead ends: 40841 [2022-11-25 22:27:40,659 INFO L226 Difference]: Without dead ends: 24343 [2022-11-25 22:27:40,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:27:40,687 INFO L413 NwaCegarLoop]: 3175 mSDtfsCounter, 6931 mSDsluCounter, 6254 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6944 SdHoareTripleChecker+Valid, 9429 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:40,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6944 Valid, 9429 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:27:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24343 states. [2022-11-25 22:27:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24343 to 24341. [2022-11-25 22:27:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24341 states, 20293 states have (on average 1.3842704380820974) internal successors, (28091), 20331 states have internal predecessors, (28091), 2391 states have call successors, (2391), 1655 states have call predecessors, (2391), 1655 states have return successors, (2391), 2355 states have call predecessors, (2391), 2391 states have call successors, (2391) [2022-11-25 22:27:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24341 states to 24341 states and 32873 transitions. [2022-11-25 22:27:42,369 INFO L78 Accepts]: Start accepts. Automaton has 24341 states and 32873 transitions. Word has length 126 [2022-11-25 22:27:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:42,369 INFO L495 AbstractCegarLoop]: Abstraction has 24341 states and 32873 transitions. [2022-11-25 22:27:42,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:27:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 24341 states and 32873 transitions. [2022-11-25 22:27:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-25 22:27:42,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:42,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:42,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:42,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 22:27:42,596 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash -391570671, now seen corresponding path program 1 times [2022-11-25 22:27:42,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:42,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276993986] [2022-11-25 22:27:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:42,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 22:27:42,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:42,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276993986] [2022-11-25 22:27:42,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276993986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:42,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770026593] [2022-11-25 22:27:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:42,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:42,835 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:42,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 22:27:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:27:43,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:27:43,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:43,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770026593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:43,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:43,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-25 22:27:43,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635622288] [2022-11-25 22:27:43,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:43,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:27:43,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:27:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:27:43,085 INFO L87 Difference]: Start difference. First operand 24341 states and 32873 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:27:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:46,379 INFO L93 Difference]: Finished difference Result 55575 states and 73353 transitions. [2022-11-25 22:27:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:27:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2022-11-25 22:27:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:46,462 INFO L225 Difference]: With dead ends: 55575 [2022-11-25 22:27:46,462 INFO L226 Difference]: Without dead ends: 32926 [2022-11-25 22:27:46,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:27:46,495 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 3605 mSDsluCounter, 6297 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3618 SdHoareTripleChecker+Valid, 9464 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:46,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3618 Valid, 9464 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:27:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32926 states. [2022-11-25 22:27:49,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32926 to 32924. [2022-11-25 22:27:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32924 states, 27166 states have (on average 1.3439961716851947) internal successors, (36511), 27222 states have internal predecessors, (36511), 3408 states have call successors, (3408), 2348 states have call predecessors, (3408), 2348 states have return successors, (3408), 3354 states have call predecessors, (3408), 3408 states have call successors, (3408) [2022-11-25 22:27:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32924 states to 32924 states and 43327 transitions. [2022-11-25 22:27:49,166 INFO L78 Accepts]: Start accepts. Automaton has 32924 states and 43327 transitions. Word has length 128 [2022-11-25 22:27:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:49,167 INFO L495 AbstractCegarLoop]: Abstraction has 32924 states and 43327 transitions. [2022-11-25 22:27:49,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:27:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 32924 states and 43327 transitions. [2022-11-25 22:27:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 22:27:49,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:49,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:49,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:49,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:49,391 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:49,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1669697137, now seen corresponding path program 1 times [2022-11-25 22:27:49,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:49,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138827427] [2022-11-25 22:27:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:49,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-25 22:27:49,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:49,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138827427] [2022-11-25 22:27:49,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138827427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:49,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058632548] [2022-11-25 22:27:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:49,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:49,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:49,562 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:49,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 22:27:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:49,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:27:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:27:49,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:49,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058632548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:49,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:49,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-25 22:27:49,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217393970] [2022-11-25 22:27:49,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:49,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:49,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:49,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:49,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:27:49,815 INFO L87 Difference]: Start difference. First operand 32924 states and 43327 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:27:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:54,176 INFO L93 Difference]: Finished difference Result 59534 states and 77874 transitions. [2022-11-25 22:27:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:54,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 130 [2022-11-25 22:27:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:54,272 INFO L225 Difference]: With dead ends: 59534 [2022-11-25 22:27:54,272 INFO L226 Difference]: Without dead ends: 38293 [2022-11-25 22:27:54,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:27:54,304 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3356 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:54,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3356 Valid, 3228 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:27:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38293 states. [2022-11-25 22:27:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38293 to 37891. [2022-11-25 22:27:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37891 states, 31775 states have (on average 1.3173249409913454) internal successors, (41858), 31831 states have internal predecessors, (41858), 3465 states have call successors, (3465), 2649 states have call predecessors, (3465), 2649 states have return successors, (3723), 3411 states have call predecessors, (3723), 3465 states have call successors, (3723) [2022-11-25 22:27:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37891 states to 37891 states and 49046 transitions. [2022-11-25 22:27:58,228 INFO L78 Accepts]: Start accepts. Automaton has 37891 states and 49046 transitions. Word has length 130 [2022-11-25 22:27:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:58,229 INFO L495 AbstractCegarLoop]: Abstraction has 37891 states and 49046 transitions. [2022-11-25 22:27:58,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:27:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 37891 states and 49046 transitions. [2022-11-25 22:27:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-25 22:27:58,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:58,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 22:27:58,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:58,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:58,477 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1741116103, now seen corresponding path program 1 times [2022-11-25 22:27:58,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:58,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98276654] [2022-11-25 22:27:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:58,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:27:58,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:58,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98276654] [2022-11-25 22:27:58,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98276654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:58,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066065288] [2022-11-25 22:27:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:58,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:58,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:58,777 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:58,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acb621b2-dff1-436e-8d55-9683ef78e961/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 22:27:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:59,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 22:27:59,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:59,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:59,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066065288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:59,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:59,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-25 22:27:59,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880723256] [2022-11-25 22:27:59,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:59,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:27:59,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:59,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:27:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:27:59,274 INFO L87 Difference]: Start difference. First operand 37891 states and 49046 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-25 22:28:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:04,224 INFO L93 Difference]: Finished difference Result 72706 states and 93468 transitions. [2022-11-25 22:28:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:28:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 132 [2022-11-25 22:28:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:04,320 INFO L225 Difference]: With dead ends: 72706 [2022-11-25 22:28:04,320 INFO L226 Difference]: Without dead ends: 48153 [2022-11-25 22:28:04,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:28:04,351 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 222 mSDsluCounter, 9400 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 12649 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:04,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 12649 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:28:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48153 states.