./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW --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 e409b9fe4cf385d3ba251b64c82a83b23d76f184ce08a1cc7bc20e4c4b1f5571 --- 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-4e7fbc6 [2022-11-23 14:49:30,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:49:30,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:49:30,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:49:30,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:49:30,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:49:30,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:49:30,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:49:30,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:49:30,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:49:30,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:49:30,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:49:30,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:49:30,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:49:30,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:49:30,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:49:30,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:49:30,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:49:30,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:49:30,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:49:30,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:49:30,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:49:30,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:49:30,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:49:30,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:49:30,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:49:30,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:49:30,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:49:30,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:49:30,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:49:30,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:49:30,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:49:30,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:49:30,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:49:30,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:49:30,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:49:30,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:49:30,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:49:30,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:49:30,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:49:30,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:49:30,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:49:30,835 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:49:30,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:49:30,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:49:30,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:49:30,836 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:49:30,837 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:49:30,837 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:49:30,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:49:30,837 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:49:30,838 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:49:30,838 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:49:30,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:49:30,838 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:49:30,838 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:49:30,839 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:49:30,839 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:49:30,839 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:49:30,839 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:49:30,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:49:30,840 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:49:30,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:49:30,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:49:30,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:49:30,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:49:30,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:49:30,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:49:30,842 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:49:30,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:49:30,842 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:49:30,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:49:30,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:49:30,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:49:30,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:49:30,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:49:30,843 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:49:30,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:49:30,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:49:30,844 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:49:30,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:49:30,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:49:30,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:49:30,845 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_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e409b9fe4cf385d3ba251b64c82a83b23d76f184ce08a1cc7bc20e4c4b1f5571 [2022-11-23 14:49:31,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:49:31,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:49:31,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:49:31,154 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:49:31,156 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:49:31,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.13.cil-2.c [2022-11-23 14:49:34,329 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:49:35,072 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:49:35,072 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/sv-benchmarks/c/combinations/Problem05_label43+token_ring.13.cil-2.c [2022-11-23 14:49:35,131 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/data/8fc8ce9dd/e820db3754a8428fb5a98698fcfc8a22/FLAGd5ed1c098 [2022-11-23 14:49:35,150 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/data/8fc8ce9dd/e820db3754a8428fb5a98698fcfc8a22 [2022-11-23 14:49:35,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:49:35,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:49:35,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:49:35,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:49:35,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:49:35,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:49:35" (1/1) ... [2022-11-23 14:49:35,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22bf0e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:35, skipping insertion in model container [2022-11-23 14:49:35,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:49:35" (1/1) ... [2022-11-23 14:49:35,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:49:35,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:49:37,754 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_58b38475-b011-4c23-a779-38bf8dc641fc/sv-benchmarks/c/combinations/Problem05_label43+token_ring.13.cil-2.c[381679,381692] [2022-11-23 14:49:37,783 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_58b38475-b011-4c23-a779-38bf8dc641fc/sv-benchmarks/c/combinations/Problem05_label43+token_ring.13.cil-2.c[383339,383352] [2022-11-23 14:49:38,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:49:38,175 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:49:39,388 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_58b38475-b011-4c23-a779-38bf8dc641fc/sv-benchmarks/c/combinations/Problem05_label43+token_ring.13.cil-2.c[381679,381692] [2022-11-23 14:49:39,393 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_58b38475-b011-4c23-a779-38bf8dc641fc/sv-benchmarks/c/combinations/Problem05_label43+token_ring.13.cil-2.c[383339,383352] [2022-11-23 14:49:39,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:49:39,524 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:49:39,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39 WrapperNode [2022-11-23 14:49:39,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:49:39,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:49:39,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:49:39,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:49:39,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:39,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,004 INFO L138 Inliner]: procedures = 70, calls = 80, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 13257 [2022-11-23 14:49:40,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:49:40,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:49:40,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:49:40,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:49:40,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,509 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:49:40,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:49:40,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:49:40,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:49:40,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (1/1) ... [2022-11-23 14:49:40,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:49:40,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:40,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:49:40,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:49:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:49:40,808 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-23 14:49:40,808 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-23 14:49:40,808 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 14:49:40,809 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 14:49:40,809 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-23 14:49:40,809 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-23 14:49:40,809 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-23 14:49:40,809 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-23 14:49:40,810 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-23 14:49:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-23 14:49:40,810 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-23 14:49:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-23 14:49:40,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:49:40,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:49:40,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:49:41,067 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:49:41,069 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:49:49,781 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:49:52,605 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:49:52,605 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-23 14:49:52,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:49:52 BoogieIcfgContainer [2022-11-23 14:49:52,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:49:52,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:49:52,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:49:52,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:49:52,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:49:35" (1/3) ... [2022-11-23 14:49:52,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270f1fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:49:52, skipping insertion in model container [2022-11-23 14:49:52,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:39" (2/3) ... [2022-11-23 14:49:52,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270f1fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:49:52, skipping insertion in model container [2022-11-23 14:49:52,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:49:52" (3/3) ... [2022-11-23 14:49:52,621 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.13.cil-2.c [2022-11-23 14:49:52,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:49:52,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 14:49:52,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:49:52,739 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;@23eb92ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:49:52,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 14:49:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 14:49:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 14:49:52,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:52,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:49:52,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1029859456, now seen corresponding path program 1 times [2022-11-23 14:49:52,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:52,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383272570] [2022-11-23 14:49:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:52,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:53,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:53,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383272570] [2022-11-23 14:49:53,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383272570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:49:53,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:49:53,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:49:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371708114] [2022-11-23 14:49:53,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:49:53,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:49:53,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:49:53,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:49:53,445 INFO L87 Difference]: Start difference. First operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-11-23 14:49:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:54,598 INFO L93 Difference]: Finished difference Result 3866 states and 7483 transitions. [2022-11-23 14:49:54,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:49:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 70 [2022-11-23 14:49:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:54,627 INFO L225 Difference]: With dead ends: 3866 [2022-11-23 14:49:54,627 INFO L226 Difference]: Without dead ends: 2023 [2022-11-23 14:49:54,638 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 [2022-11-23 14:49:54,643 INFO L413 NwaCegarLoop]: 3541 mSDtfsCounter, 3812 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 6980 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:54,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3812 Valid, 6980 Invalid, 756 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:49:54,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-11-23 14:49:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2022. [2022-11-23 14:49:54,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 1958 states have (on average 1.916241062308478) internal successors, (3752), 1961 states have internal predecessors, (3752), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-23 14:49:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 3852 transitions. [2022-11-23 14:49:54,791 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 3852 transitions. Word has length 70 [2022-11-23 14:49:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:54,791 INFO L495 AbstractCegarLoop]: Abstraction has 2022 states and 3852 transitions. [2022-11-23 14:49:54,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-11-23 14:49:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 3852 transitions. [2022-11-23 14:49:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:49:54,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:54,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:49:54,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:49:54,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:54,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:54,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1019021321, now seen corresponding path program 1 times [2022-11-23 14:49:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:54,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644179047] [2022-11-23 14:49:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:54,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:49:55,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:55,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644179047] [2022-11-23 14:49:55,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644179047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:49:55,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188538808] [2022-11-23 14:49:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:55,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:55,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:55,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:49:55,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:49:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:55,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:49:55,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:49:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:49:55,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:49:55,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188538808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:49:55,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:49:55,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:49:55,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820592424] [2022-11-23 14:49:55,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:49:55,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:49:55,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:55,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:49:55,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:49:55,683 INFO L87 Difference]: Start difference. First operand 2022 states and 3852 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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) [2022-11-23 14:49:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:56,401 INFO L93 Difference]: Finished difference Result 2767 states and 5025 transitions. [2022-11-23 14:49:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:49:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 143 [2022-11-23 14:49:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:56,425 INFO L225 Difference]: With dead ends: 2767 [2022-11-23 14:49:56,425 INFO L226 Difference]: Without dead ends: 2391 [2022-11-23 14:49:56,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:49:56,429 INFO L413 NwaCegarLoop]: 3360 mSDtfsCounter, 3525 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3600 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:56,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 3600 Invalid, 324 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:49:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-11-23 14:49:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2387. [2022-11-23 14:49:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2267 states have (on average 1.8619320688134098) internal successors, (4221), 2271 states have internal predecessors, (4221), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-23 14:49:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 4409 transitions. [2022-11-23 14:49:56,575 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 4409 transitions. Word has length 143 [2022-11-23 14:49:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:56,579 INFO L495 AbstractCegarLoop]: Abstraction has 2387 states and 4409 transitions. [2022-11-23 14:49:56,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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) [2022-11-23 14:49:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 4409 transitions. [2022-11-23 14:49:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:49:56,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:56,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:49:56,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:49:56,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:56,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:56,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1605039111, now seen corresponding path program 1 times [2022-11-23 14:49:56,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:56,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835655609] [2022-11-23 14:49:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:56,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:49:57,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:57,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835655609] [2022-11-23 14:49:57,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835655609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:49:57,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20759306] [2022-11-23 14:49:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:57,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:57,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:57,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:49:57,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:49:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:57,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:49:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:49:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:49:57,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:49:57,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20759306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:49:57,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:49:57,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:49:57,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472513786] [2022-11-23 14:49:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:49:57,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:49:57,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:49:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:49:57,616 INFO L87 Difference]: Start difference. First operand 2387 states and 4409 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2022-11-23 14:49:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:58,339 INFO L93 Difference]: Finished difference Result 3856 states and 6716 transitions. [2022-11-23 14:49:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:49:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 143 [2022-11-23 14:49:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:58,356 INFO L225 Difference]: With dead ends: 3856 [2022-11-23 14:49:58,356 INFO L226 Difference]: Without dead ends: 3115 [2022-11-23 14:49:58,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:49:58,362 INFO L413 NwaCegarLoop]: 3348 mSDtfsCounter, 3537 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:58,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:49:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-11-23 14:49:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3109. [2022-11-23 14:49:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 2879 states have (on average 1.7877735324765545) internal successors, (5147), 2885 states have internal predecessors, (5147), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-23 14:49:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 5507 transitions. [2022-11-23 14:49:58,517 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 5507 transitions. Word has length 143 [2022-11-23 14:49:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:58,517 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 5507 transitions. [2022-11-23 14:49:58,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2022-11-23 14:49:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 5507 transitions. [2022-11-23 14:49:58,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:49:58,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:58,526 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:49:58,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 14:49:58,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:58,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1947259653, now seen corresponding path program 1 times [2022-11-23 14:49:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:58,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238180458] [2022-11-23 14:49:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:49:59,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:59,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238180458] [2022-11-23 14:49:59,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238180458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:49:59,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001159360] [2022-11-23 14:49:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:59,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:59,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:59,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:49:59,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:49:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:59,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:49:59,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:49:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:49:59,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:49:59,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001159360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:49:59,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:49:59,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:49:59,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584369172] [2022-11-23 14:49:59,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:49:59,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:49:59,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:59,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:49:59,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:49:59,476 INFO L87 Difference]: Start difference. First operand 3109 states and 5507 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2022-11-23 14:50:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:00,364 INFO L93 Difference]: Finished difference Result 6010 states and 10048 transitions. [2022-11-23 14:50:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:00,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 143 [2022-11-23 14:50:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:00,395 INFO L225 Difference]: With dead ends: 6010 [2022-11-23 14:50:00,395 INFO L226 Difference]: Without dead ends: 4547 [2022-11-23 14:50:00,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:00,406 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3519 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:00,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:50:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2022-11-23 14:50:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4537. [2022-11-23 14:50:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4091 states have (on average 1.7049621119530678) internal successors, (6975), 4101 states have internal predecessors, (6975), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-23 14:50:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 7671 transitions. [2022-11-23 14:50:00,743 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 7671 transitions. Word has length 143 [2022-11-23 14:50:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:00,744 INFO L495 AbstractCegarLoop]: Abstraction has 4537 states and 7671 transitions. [2022-11-23 14:50:00,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2022-11-23 14:50:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 7671 transitions. [2022-11-23 14:50:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:50:00,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:00,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:00,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:00,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:00,965 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:00,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash -719787395, now seen corresponding path program 1 times [2022-11-23 14:50:00,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:00,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423925167] [2022-11-23 14:50:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:00,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:50:01,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:01,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423925167] [2022-11-23 14:50:01,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423925167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:01,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750351931] [2022-11-23 14:50:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:01,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:01,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:01,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:01,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:50:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:01,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:50:01,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:50:01,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:01,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750351931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:01,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:01,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:50:01,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112281416] [2022-11-23 14:50:01,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:01,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:50:01,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:01,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:50:01,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:01,634 INFO L87 Difference]: Start difference. First operand 4537 states and 7671 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2022-11-23 14:50:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:02,575 INFO L93 Difference]: Finished difference Result 10270 states and 16612 transitions. [2022-11-23 14:50:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:02,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 143 [2022-11-23 14:50:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:02,612 INFO L225 Difference]: With dead ends: 10270 [2022-11-23 14:50:02,613 INFO L226 Difference]: Without dead ends: 7379 [2022-11-23 14:50:02,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:02,625 INFO L413 NwaCegarLoop]: 3346 mSDtfsCounter, 3543 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3543 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:02,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3543 Valid, 3586 Invalid, 321 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:50:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2022-11-23 14:50:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 7361. [2022-11-23 14:50:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 6491 states have (on average 1.6304113387767678) internal successors, (10583), 6509 states have internal predecessors, (10583), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-23 14:50:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 11935 transitions. [2022-11-23 14:50:02,969 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 11935 transitions. Word has length 143 [2022-11-23 14:50:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:02,970 INFO L495 AbstractCegarLoop]: Abstraction has 7361 states and 11935 transitions. [2022-11-23 14:50:02,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2022-11-23 14:50:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 11935 transitions. [2022-11-23 14:50:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:50:02,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:02,984 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:02,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:03,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:03,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1017299455, now seen corresponding path program 1 times [2022-11-23 14:50:03,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:03,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695053125] [2022-11-23 14:50:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:50:03,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:03,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695053125] [2022-11-23 14:50:03,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695053125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:03,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94277968] [2022-11-23 14:50:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:03,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:03,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:03,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:03,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:50:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:03,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:50:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:50:03,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:03,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94277968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:03,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:03,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:50:03,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443355391] [2022-11-23 14:50:03,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:03,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:50:03,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:50:03,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:03,779 INFO L87 Difference]: Start difference. First operand 7361 states and 11935 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-11-23 14:50:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:04,703 INFO L93 Difference]: Finished difference Result 18694 states and 29540 transitions. [2022-11-23 14:50:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:04,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 143 [2022-11-23 14:50:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:04,772 INFO L225 Difference]: With dead ends: 18694 [2022-11-23 14:50:04,772 INFO L226 Difference]: Without dead ends: 12979 [2022-11-23 14:50:04,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:04,805 INFO L413 NwaCegarLoop]: 3356 mSDtfsCounter, 3546 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:04,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 3596 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:50:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2022-11-23 14:50:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 12945. [2022-11-23 14:50:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 11243 states have (on average 1.574579738503958) internal successors, (17703), 11277 states have internal predecessors, (17703), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-23 14:50:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 20335 transitions. [2022-11-23 14:50:05,663 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 20335 transitions. Word has length 143 [2022-11-23 14:50:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:05,667 INFO L495 AbstractCegarLoop]: Abstraction has 12945 states and 20335 transitions. [2022-11-23 14:50:05,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-11-23 14:50:05,667 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 20335 transitions. [2022-11-23 14:50:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:50:05,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:05,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:05,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 14:50:05,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:50:05,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 510698301, now seen corresponding path program 1 times [2022-11-23 14:50:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:05,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709179176] [2022-11-23 14:50:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:50:06,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:06,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709179176] [2022-11-23 14:50:06,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709179176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:06,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815367797] [2022-11-23 14:50:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:06,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:06,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:06,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:06,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:50:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:50:06,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:50:06,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:06,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815367797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:06,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:06,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:50:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491543048] [2022-11-23 14:50:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:50:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:50:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:06,529 INFO L87 Difference]: Start difference. First operand 12945 states and 20335 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2022-11-23 14:50:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:07,973 INFO L93 Difference]: Finished difference Result 35350 states and 54996 transitions. [2022-11-23 14:50:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:07,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 143 [2022-11-23 14:50:07,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:08,077 INFO L225 Difference]: With dead ends: 35350 [2022-11-23 14:50:08,077 INFO L226 Difference]: Without dead ends: 24051 [2022-11-23 14:50:08,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:08,112 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3516 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3516 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:08,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3516 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:50:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24051 states. [2022-11-23 14:50:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24051 to 23985. [2022-11-23 14:50:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23985 states, 20651 states have (on average 1.53750423708295) internal successors, (31751), 20717 states have internal predecessors, (31751), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-23 14:50:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23985 states to 23985 states and 36879 transitions. [2022-11-23 14:50:09,345 INFO L78 Accepts]: Start accepts. Automaton has 23985 states and 36879 transitions. Word has length 143 [2022-11-23 14:50:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:09,352 INFO L495 AbstractCegarLoop]: Abstraction has 23985 states and 36879 transitions. [2022-11-23 14:50:09,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2022-11-23 14:50:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 23985 states and 36879 transitions. [2022-11-23 14:50:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:50:09,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:09,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:09,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:09,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:09,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:09,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:09,614 INFO L85 PathProgramCache]: Analyzing trace with hash -898521861, now seen corresponding path program 1 times [2022-11-23 14:50:09,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:09,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574037958] [2022-11-23 14:50:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:09,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:50:09,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:09,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574037958] [2022-11-23 14:50:09,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574037958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:09,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122027942] [2022-11-23 14:50:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:09,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:09,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:09,986 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:10,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:50:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:10,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:50:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 14:50:10,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:10,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122027942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:10,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:10,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:50:10,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300481359] [2022-11-23 14:50:10,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:10,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:50:10,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:50:10,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:10,348 INFO L87 Difference]: Start difference. First operand 23985 states and 36879 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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) [2022-11-23 14:50:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:12,530 INFO L93 Difference]: Finished difference Result 68278 states and 105108 transitions. [2022-11-23 14:50:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 143 [2022-11-23 14:50:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:12,783 INFO L225 Difference]: With dead ends: 68278 [2022-11-23 14:50:12,783 INFO L226 Difference]: Without dead ends: 45939 [2022-11-23 14:50:13,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:13,026 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3531 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3531 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:13,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3531 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:50:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45939 states. [2022-11-23 14:50:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45939 to 45809. [2022-11-23 14:50:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45809 states, 39275 states have (on average 1.514016549968173) internal successors, (59463), 39405 states have internal predecessors, (59463), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-23 14:50:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45809 states to 45809 states and 69455 transitions. [2022-11-23 14:50:15,530 INFO L78 Accepts]: Start accepts. Automaton has 45809 states and 69455 transitions. Word has length 143 [2022-11-23 14:50:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:15,530 INFO L495 AbstractCegarLoop]: Abstraction has 45809 states and 69455 transitions. [2022-11-23 14:50:15,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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) [2022-11-23 14:50:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 45809 states and 69455 transitions. [2022-11-23 14:50:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:50:15,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:15,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:15,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:15,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58b38475-b011-4c23-a779-38bf8dc641fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:15,839 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:15,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2020683645, now seen corresponding path program 1 times [2022-11-23 14:50:15,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:15,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713304443] [2022-11-23 14:50:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:15,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 14:50:16,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:16,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713304443] [2022-11-23 14:50:16,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713304443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:16,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:16,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:50:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552743762] [2022-11-23 14:50:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:16,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:50:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:50:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:16,746 INFO L87 Difference]: Start difference. First operand 45809 states and 69455 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:50:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:22,740 INFO L93 Difference]: Finished difference Result 156917 states and 235730 transitions. [2022-11-23 14:50:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:50:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2022-11-23 14:50:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:23,384 INFO L225 Difference]: With dead ends: 156917 [2022-11-23 14:50:23,384 INFO L226 Difference]: Without dead ends: 112755 [2022-11-23 14:50:23,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:50:23,539 INFO L413 NwaCegarLoop]: 3328 mSDtfsCounter, 4487 mSDsluCounter, 6601 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4509 SdHoareTripleChecker+Valid, 9929 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:23,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4509 Valid, 9929 Invalid, 1097 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:50:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112755 states. [2022-11-23 14:50:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112755 to 88433. [2022-11-23 14:50:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88433 states, 75627 states have (on average 1.4988165602232006) internal successors, (113351), 75885 states have internal predecessors, (113351), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-23 14:50:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88433 states to 88433 states and 132815 transitions. [2022-11-23 14:50:29,010 INFO L78 Accepts]: Start accepts. Automaton has 88433 states and 132815 transitions. Word has length 143 [2022-11-23 14:50:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:29,012 INFO L495 AbstractCegarLoop]: Abstraction has 88433 states and 132815 transitions. [2022-11-23 14:50:29,013 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), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:50:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 88433 states and 132815 transitions. [2022-11-23 14:50:29,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:50:29,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:29,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:29,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:50:29,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1402596620, now seen corresponding path program 1 times [2022-11-23 14:50:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:29,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772516380] [2022-11-23 14:50:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 14:50:30,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:30,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772516380] [2022-11-23 14:50:30,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772516380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:30,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:30,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:50:30,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127724025] [2022-11-23 14:50:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:30,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:50:30,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:50:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:30,245 INFO L87 Difference]: Start difference. First operand 88433 states and 132815 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:50:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:39,408 INFO L93 Difference]: Finished difference Result 238325 states and 357457 transitions. [2022-11-23 14:50:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:50:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-11-23 14:50:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:40,337 INFO L225 Difference]: With dead ends: 238325 [2022-11-23 14:50:40,337 INFO L226 Difference]: Without dead ends: 151539 [2022-11-23 14:50:40,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:50:40,639 INFO L413 NwaCegarLoop]: 3320 mSDtfsCounter, 4256 mSDsluCounter, 9899 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4262 SdHoareTripleChecker+Valid, 13219 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:40,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4262 Valid, 13219 Invalid, 1415 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [157 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:50:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151539 states.