./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh --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 ece5e10278ff4277201bc584c9d4f272bab8d3b56dec5e2dfa257f3717fce473 --- 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-2329fc7 [2022-12-14 10:52:01,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:52:01,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:52:01,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:52:01,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:52:01,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:52:01,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:52:01,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:52:01,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:52:01,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:52:01,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:52:01,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:52:01,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:52:01,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:52:01,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:52:01,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:52:01,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:52:01,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:52:01,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:52:01,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:52:01,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:52:01,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:52:01,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:52:01,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:52:01,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:52:01,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:52:01,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:52:01,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:52:01,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:52:01,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:52:01,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:52:01,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:52:01,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:52:01,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:52:01,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:52:01,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:52:01,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:52:01,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:52:01,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:52:01,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:52:01,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:52:01,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:52:01,654 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:52:01,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:52:01,654 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:52:01,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:52:01,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:52:01,655 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:52:01,656 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:52:01,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:52:01,656 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:52:01,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:52:01,656 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:52:01,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:52:01,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:52:01,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:52:01,657 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:52:01,657 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:52:01,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:52:01,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:52:01,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:52:01,659 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:52:01,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:52:01,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:52:01,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:52:01,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:52:01,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:52:01,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:52:01,660 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:52:01,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:52:01,660 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:52:01,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:52:01,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:52:01,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:52:01,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:52:01,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:52:01,661 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:52:01,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:52:01,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:52:01,662 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:52:01,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:52:01,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:52:01,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:52:01,662 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_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ece5e10278ff4277201bc584c9d4f272bab8d3b56dec5e2dfa257f3717fce473 [2022-12-14 10:52:01,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:52:01,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:52:01,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:52:01,903 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:52:01,904 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:52:01,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c [2022-12-14 10:52:04,462 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:52:04,980 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:52:04,981 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c [2022-12-14 10:52:05,024 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/data/7a1bc1b64/af50c3e22d5e45faa2bbd228077692d4/FLAG161151d2b [2022-12-14 10:52:05,037 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/data/7a1bc1b64/af50c3e22d5e45faa2bbd228077692d4 [2022-12-14 10:52:05,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:52:05,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:52:05,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:52:05,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:52:05,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:52:05,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:52:05" (1/1) ... [2022-12-14 10:52:05,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aabce73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:05, skipping insertion in model container [2022-12-14 10:52:05,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:52:05" (1/1) ... [2022-12-14 10:52:05,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:52:05,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:52:06,638 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_baaef996-b085-4239-bfbd-4902a6cb6d4e/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c[381679,381692] [2022-12-14 10:52:06,658 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_baaef996-b085-4239-bfbd-4902a6cb6d4e/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c[383339,383352] [2022-12-14 10:52:06,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:52:06,850 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:52:07,665 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_baaef996-b085-4239-bfbd-4902a6cb6d4e/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c[381679,381692] [2022-12-14 10:52:07,667 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_baaef996-b085-4239-bfbd-4902a6cb6d4e/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c[383339,383352] [2022-12-14 10:52:07,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:52:07,720 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:52:07,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07 WrapperNode [2022-12-14 10:52:07,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:52:07,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:52:07,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:52:07,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:52:07,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:07,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,098 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 12914 [2022-12-14 10:52:08,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:52:08,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:52:08,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:52:08,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:52:08,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,464 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:52:08,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:52:08,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:52:08,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:52:08,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (1/1) ... [2022-12-14 10:52:08,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:52:08,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:08,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:52:08,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:52:08,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:52:08,622 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 10:52:08,622 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 10:52:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 10:52:08,623 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 10:52:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 10:52:08,623 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 10:52:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 10:52:08,623 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 10:52:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 10:52:08,623 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 10:52:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 10:52:08,623 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 10:52:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 10:52:08,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 10:52:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:52:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:52:08,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:52:08,726 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:52:08,728 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:52:14,358 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:52:15,842 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:52:15,842 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 10:52:15,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:52:15 BoogieIcfgContainer [2022-12-14 10:52:15,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:52:15,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:52:15,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:52:15,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:52:15,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:52:05" (1/3) ... [2022-12-14 10:52:15,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3badca6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:52:15, skipping insertion in model container [2022-12-14 10:52:15,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:07" (2/3) ... [2022-12-14 10:52:15,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3badca6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:52:15, skipping insertion in model container [2022-12-14 10:52:15,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:52:15" (3/3) ... [2022-12-14 10:52:15,854 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.07.cil-2.c [2022-12-14 10:52:15,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:52:15,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 10:52:15,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:52:15,968 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;@5db65f4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:52:15,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 10:52:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 1782 states, 1749 states have (on average 1.9662664379645511) internal successors, (3439), 1754 states have internal predecessors, (3439), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-14 10:52:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 10:52:15,983 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:15,983 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] [2022-12-14 10:52:15,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:15,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2084527391, now seen corresponding path program 1 times [2022-12-14 10:52:15,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:15,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447207823] [2022-12-14 10:52:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:15,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:16,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447207823] [2022-12-14 10:52:16,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447207823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:16,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:16,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:52:16,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050591039] [2022-12-14 10:52:16,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:16,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:52:16,320 INFO L87 Difference]: Start difference. First operand has 1782 states, 1749 states have (on average 1.9662664379645511) internal successors, (3439), 1754 states have internal predecessors, (3439), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:52:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:17,006 INFO L93 Difference]: Finished difference Result 3679 states and 7167 transitions. [2022-12-14 10:52:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:52:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-12-14 10:52:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:17,025 INFO L225 Difference]: With dead ends: 3679 [2022-12-14 10:52:17,025 INFO L226 Difference]: Without dead ends: 1896 [2022-12-14 10:52:17,031 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 [2022-12-14 10:52:17,033 INFO L413 NwaCegarLoop]: 3368 mSDtfsCounter, 3622 mSDsluCounter, 3288 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3622 SdHoareTripleChecker+Valid, 6656 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:17,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3622 Valid, 6656 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:52:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2022-12-14 10:52:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1895. [2022-12-14 10:52:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1841 states have (on average 1.9369907658881043) internal successors, (3566), 1845 states have internal predecessors, (3566), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 10:52:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 3644 transitions. [2022-12-14 10:52:17,122 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 3644 transitions. Word has length 53 [2022-12-14 10:52:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:17,122 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 3644 transitions. [2022-12-14 10:52:17,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:52:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 3644 transitions. [2022-12-14 10:52:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 10:52:17,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:17,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:17,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:52:17,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1767948784, now seen corresponding path program 1 times [2022-12-14 10:52:17,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:17,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234092048] [2022-12-14 10:52:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:17,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:52:17,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:17,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234092048] [2022-12-14 10:52:17,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234092048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:17,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238744370] [2022-12-14 10:52:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:17,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:17,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:17,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:17,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:52:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:17,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:52:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 10:52:17,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:17,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238744370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:17,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:17,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:52:17,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123100762] [2022-12-14 10:52:17,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:17,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:17,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:17,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:17,515 INFO L87 Difference]: Start difference. First operand 1895 states and 3644 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:52:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:17,910 INFO L93 Difference]: Finished difference Result 2386 states and 4389 transitions. [2022-12-14 10:52:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-12-14 10:52:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:17,919 INFO L225 Difference]: With dead ends: 2386 [2022-12-14 10:52:17,919 INFO L226 Difference]: Without dead ends: 2137 [2022-12-14 10:52:17,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:17,921 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3437 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:17,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3429 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:17,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-12-14 10:52:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2131. [2022-12-14 10:52:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2033 states have (on average 1.8932611903590753) internal successors, (3849), 2038 states have internal predecessors, (3849), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-12-14 10:52:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 3991 transitions. [2022-12-14 10:52:17,978 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 3991 transitions. Word has length 102 [2022-12-14 10:52:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:17,979 INFO L495 AbstractCegarLoop]: Abstraction has 2131 states and 3991 transitions. [2022-12-14 10:52:17,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:52:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 3991 transitions. [2022-12-14 10:52:17,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 10:52:17,982 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:17,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:17,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:52:18,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:18,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash 977486094, now seen corresponding path program 1 times [2022-12-14 10:52:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:18,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145199969] [2022-12-14 10:52:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:18,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:52:18,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:18,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145199969] [2022-12-14 10:52:18,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145199969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:18,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987005019] [2022-12-14 10:52:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:18,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:18,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:18,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:18,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:52:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:18,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:52:18,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 10:52:18,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:18,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987005019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:18,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:18,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:52:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564296927] [2022-12-14 10:52:18,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:18,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:18,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:18,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:18,474 INFO L87 Difference]: Start difference. First operand 2131 states and 3991 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:52:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:18,880 INFO L93 Difference]: Finished difference Result 3088 states and 5438 transitions. [2022-12-14 10:52:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:18,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-12-14 10:52:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:18,890 INFO L225 Difference]: With dead ends: 3088 [2022-12-14 10:52:18,890 INFO L226 Difference]: Without dead ends: 2603 [2022-12-14 10:52:18,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:18,893 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3443 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:18,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2022-12-14 10:52:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2595. [2022-12-14 10:52:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2411 states have (on average 1.8262131895479055) internal successors, (4403), 2418 states have internal predecessors, (4403), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-12-14 10:52:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 4669 transitions. [2022-12-14 10:52:18,958 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 4669 transitions. Word has length 102 [2022-12-14 10:52:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:18,959 INFO L495 AbstractCegarLoop]: Abstraction has 2595 states and 4669 transitions. [2022-12-14 10:52:18,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:52:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 4669 transitions. [2022-12-14 10:52:18,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 10:52:18,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:18,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:18,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:52:19,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:19,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash -607351412, now seen corresponding path program 1 times [2022-12-14 10:52:19,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:19,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938501832] [2022-12-14 10:52:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:19,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:52:19,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:19,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938501832] [2022-12-14 10:52:19,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938501832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:19,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497331206] [2022-12-14 10:52:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:19,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:19,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:19,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:19,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:52:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:52:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 10:52:19,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:19,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497331206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:19,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:19,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:52:19,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854142799] [2022-12-14 10:52:19,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:19,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:19,468 INFO L87 Difference]: Start difference. First operand 2595 states and 4669 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:52:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:19,865 INFO L93 Difference]: Finished difference Result 4468 states and 7486 transitions. [2022-12-14 10:52:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:19,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-12-14 10:52:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:19,881 INFO L225 Difference]: With dead ends: 4468 [2022-12-14 10:52:19,881 INFO L226 Difference]: Without dead ends: 3519 [2022-12-14 10:52:19,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:19,885 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3446 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:19,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2022-12-14 10:52:19,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3507. [2022-12-14 10:52:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3155 states have (on average 1.7391442155309034) internal successors, (5487), 3166 states have internal predecessors, (5487), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-12-14 10:52:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 5993 transitions. [2022-12-14 10:52:19,988 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 5993 transitions. Word has length 102 [2022-12-14 10:52:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:19,988 INFO L495 AbstractCegarLoop]: Abstraction has 3507 states and 5993 transitions. [2022-12-14 10:52:19,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:52:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 5993 transitions. [2022-12-14 10:52:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 10:52:19,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:19,993 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:19,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 10:52:20,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:20,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:20,194 INFO L85 PathProgramCache]: Analyzing trace with hash 73992270, now seen corresponding path program 1 times [2022-12-14 10:52:20,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:20,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652907471] [2022-12-14 10:52:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:20,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:52:20,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:20,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652907471] [2022-12-14 10:52:20,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652907471] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:20,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087025992] [2022-12-14 10:52:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:20,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:20,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:20,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:20,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:52:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:20,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:52:20,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:52:20,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:20,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087025992] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:20,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:20,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:52:20,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853724411] [2022-12-14 10:52:20,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:20,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:20,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:20,444 INFO L87 Difference]: Start difference. First operand 3507 states and 5993 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:52:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:20,849 INFO L93 Difference]: Finished difference Result 7180 states and 11482 transitions. [2022-12-14 10:52:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:20,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-12-14 10:52:20,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:20,874 INFO L225 Difference]: With dead ends: 7180 [2022-12-14 10:52:20,874 INFO L226 Difference]: Without dead ends: 5319 [2022-12-14 10:52:20,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:20,881 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3431 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:20,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2022-12-14 10:52:20,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5299. [2022-12-14 10:52:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5299 states, 4619 states have (on average 1.6468932669408962) internal successors, (7607), 4638 states have internal predecessors, (7607), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-12-14 10:52:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5299 states to 5299 states and 8577 transitions. [2022-12-14 10:52:21,006 INFO L78 Accepts]: Start accepts. Automaton has 5299 states and 8577 transitions. Word has length 102 [2022-12-14 10:52:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:21,006 INFO L495 AbstractCegarLoop]: Abstraction has 5299 states and 8577 transitions. [2022-12-14 10:52:21,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:52:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand 5299 states and 8577 transitions. [2022-12-14 10:52:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 10:52:21,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:21,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:21,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:52:21,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:21,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash 672309708, now seen corresponding path program 1 times [2022-12-14 10:52:21,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:21,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666680242] [2022-12-14 10:52:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:21,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 10:52:21,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:21,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666680242] [2022-12-14 10:52:21,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666680242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:21,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:21,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:52:21,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762661149] [2022-12-14 10:52:21,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:21,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:21,308 INFO L87 Difference]: Start difference. First operand 5299 states and 8577 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 10:52:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:21,800 INFO L93 Difference]: Finished difference Result 8151 states and 12868 transitions. [2022-12-14 10:52:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:21,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2022-12-14 10:52:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:21,829 INFO L225 Difference]: With dead ends: 8151 [2022-12-14 10:52:21,829 INFO L226 Difference]: Without dead ends: 6259 [2022-12-14 10:52:21,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:21,836 INFO L413 NwaCegarLoop]: 3307 mSDtfsCounter, 82 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6536 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:21,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6536 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2022-12-14 10:52:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 5939. [2022-12-14 10:52:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5227 states have (on average 1.6542950066960016) internal successors, (8647), 5246 states have internal predecessors, (8647), 502 states have call successors, (502), 209 states have call predecessors, (502), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-12-14 10:52:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 9649 transitions. [2022-12-14 10:52:22,071 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 9649 transitions. Word has length 102 [2022-12-14 10:52:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:22,072 INFO L495 AbstractCegarLoop]: Abstraction has 5939 states and 9649 transitions. [2022-12-14 10:52:22,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 10:52:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 9649 transitions. [2022-12-14 10:52:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 10:52:22,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:22,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:52:22,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:52:22,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:22,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1902000354, now seen corresponding path program 1 times [2022-12-14 10:52:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:22,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899812663] [2022-12-14 10:52:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:22,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 10:52:22,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:22,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899812663] [2022-12-14 10:52:22,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899812663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:22,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:22,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:52:22,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619125457] [2022-12-14 10:52:22,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:22,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:22,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:22,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:22,171 INFO L87 Difference]: Start difference. First operand 5939 states and 9649 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:52:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:22,633 INFO L93 Difference]: Finished difference Result 14380 states and 22394 transitions. [2022-12-14 10:52:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:22,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2022-12-14 10:52:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:22,668 INFO L225 Difference]: With dead ends: 14380 [2022-12-14 10:52:22,668 INFO L226 Difference]: Without dead ends: 10087 [2022-12-14 10:52:22,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:22,681 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3435 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:22,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10087 states. [2022-12-14 10:52:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10087 to 10035. [2022-12-14 10:52:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10035 states, 8651 states have (on average 1.5839787307825686) internal successors, (13703), 8686 states have internal predecessors, (13703), 966 states have call successors, (966), 417 states have call predecessors, (966), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-12-14 10:52:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10035 states to 10035 states and 15633 transitions. [2022-12-14 10:52:23,059 INFO L78 Accepts]: Start accepts. Automaton has 10035 states and 15633 transitions. Word has length 137 [2022-12-14 10:52:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:23,060 INFO L495 AbstractCegarLoop]: Abstraction has 10035 states and 15633 transitions. [2022-12-14 10:52:23,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:52:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 10035 states and 15633 transitions. [2022-12-14 10:52:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 10:52:23,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:23,074 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:52:23,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:52:23,074 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:23,075 INFO L85 PathProgramCache]: Analyzing trace with hash -573281343, now seen corresponding path program 1 times [2022-12-14 10:52:23,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:23,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723092204] [2022-12-14 10:52:23,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:23,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 10:52:23,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:23,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723092204] [2022-12-14 10:52:23,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723092204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:23,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:23,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:52:23,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333426992] [2022-12-14 10:52:23,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:23,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:23,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:23,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:23,129 INFO L87 Difference]: Start difference. First operand 10035 states and 15633 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:52:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:23,880 INFO L93 Difference]: Finished difference Result 26524 states and 40314 transitions. [2022-12-14 10:52:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2022-12-14 10:52:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:23,919 INFO L225 Difference]: With dead ends: 26524 [2022-12-14 10:52:23,919 INFO L226 Difference]: Without dead ends: 18135 [2022-12-14 10:52:23,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:23,934 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3437 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:23,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18135 states. [2022-12-14 10:52:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18135 to 18035. [2022-12-14 10:52:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 15339 states have (on average 1.5317165395397354) internal successors, (23495), 15406 states have internal predecessors, (23495), 1862 states have call successors, (1862), 833 states have call predecessors, (1862), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-12-14 10:52:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 27217 transitions. [2022-12-14 10:52:24,386 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 27217 transitions. Word has length 137 [2022-12-14 10:52:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:24,386 INFO L495 AbstractCegarLoop]: Abstraction has 18035 states and 27217 transitions. [2022-12-14 10:52:24,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:52:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 27217 transitions. [2022-12-14 10:52:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 10:52:24,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:24,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:52:24,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:52:24,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:24,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1640714741, now seen corresponding path program 1 times [2022-12-14 10:52:24,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:24,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170142745] [2022-12-14 10:52:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:24,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 10:52:24,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:24,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170142745] [2022-12-14 10:52:24,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170142745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:24,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:24,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:52:24,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881904631] [2022-12-14 10:52:24,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:24,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:24,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:24,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:24,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:24,491 INFO L87 Difference]: Start difference. First operand 18035 states and 27217 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:52:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:25,441 INFO L93 Difference]: Finished difference Result 50236 states and 74970 transitions. [2022-12-14 10:52:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:25,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2022-12-14 10:52:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:25,526 INFO L225 Difference]: With dead ends: 50236 [2022-12-14 10:52:25,526 INFO L226 Difference]: Without dead ends: 33847 [2022-12-14 10:52:25,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:25,564 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 3440 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3440 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:25,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3440 Valid, 3417 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33847 states. [2022-12-14 10:52:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33847 to 33651. [2022-12-14 10:52:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33651 states, 28395 states have (on average 1.4945941186828666) internal successors, (42439), 28526 states have internal predecessors, (42439), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-12-14 10:52:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33651 states to 33651 states and 49617 transitions. [2022-12-14 10:52:26,665 INFO L78 Accepts]: Start accepts. Automaton has 33651 states and 49617 transitions. Word has length 137 [2022-12-14 10:52:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:26,665 INFO L495 AbstractCegarLoop]: Abstraction has 33651 states and 49617 transitions. [2022-12-14 10:52:26,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:52:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 33651 states and 49617 transitions. [2022-12-14 10:52:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 10:52:26,716 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:26,717 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:52:26,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:52:26,717 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:26,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1796048317, now seen corresponding path program 1 times [2022-12-14 10:52:26,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:26,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446564782] [2022-12-14 10:52:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:26,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 10:52:26,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:26,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446564782] [2022-12-14 10:52:26,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446564782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:26,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48002753] [2022-12-14 10:52:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:26,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:26,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:26,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:26,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:52:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:52:27,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 10:52:27,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:27,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48002753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:27,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:27,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:52:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265405006] [2022-12-14 10:52:27,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:52:27,128 INFO L87 Difference]: Start difference. First operand 33651 states and 49617 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:52:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:28,273 INFO L93 Difference]: Finished difference Result 50171 states and 74711 transitions. [2022-12-14 10:52:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:28,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 157 [2022-12-14 10:52:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:28,345 INFO L225 Difference]: With dead ends: 50171 [2022-12-14 10:52:28,345 INFO L226 Difference]: Without dead ends: 33783 [2022-12-14 10:52:28,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:52:28,381 INFO L413 NwaCegarLoop]: 3353 mSDtfsCounter, 164 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 6568 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:28,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 6568 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33783 states. [2022-12-14 10:52:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33783 to 33523. [2022-12-14 10:52:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33523 states, 28267 states have (on average 1.4787207698022429) internal successors, (41799), 28398 states have internal predecessors, (41799), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-12-14 10:52:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33523 states to 33523 states and 48977 transitions. [2022-12-14 10:52:29,692 INFO L78 Accepts]: Start accepts. Automaton has 33523 states and 48977 transitions. Word has length 157 [2022-12-14 10:52:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:29,692 INFO L495 AbstractCegarLoop]: Abstraction has 33523 states and 48977 transitions. [2022-12-14 10:52:29,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:52:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 33523 states and 48977 transitions. [2022-12-14 10:52:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 10:52:29,766 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:29,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2022-12-14 10:52:29,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:52:29,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:29,967 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1995853441, now seen corresponding path program 1 times [2022-12-14 10:52:29,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:29,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370039449] [2022-12-14 10:52:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:29,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 10:52:30,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:30,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370039449] [2022-12-14 10:52:30,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370039449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:30,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668681184] [2022-12-14 10:52:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:30,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:30,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:30,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:30,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:52:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:52:30,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 10:52:30,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:30,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668681184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:30,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:30,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:52:30,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934613380] [2022-12-14 10:52:30,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:30,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:30,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:30,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:30,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:52:30,481 INFO L87 Difference]: Start difference. First operand 33523 states and 48977 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:52:31,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:31,764 INFO L93 Difference]: Finished difference Result 58161 states and 83086 transitions. [2022-12-14 10:52:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:31,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 157 [2022-12-14 10:52:31,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:31,848 INFO L225 Difference]: With dead ends: 58161 [2022-12-14 10:52:31,848 INFO L226 Difference]: Without dead ends: 41965 [2022-12-14 10:52:31,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:52:31,886 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3443 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:31,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3290 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41965 states. [2022-12-14 10:52:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41965 to 41965. [2022-12-14 10:52:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41965 states, 35945 states have (on average 1.4227569898455974) internal successors, (51141), 36076 states have internal predecessors, (51141), 3844 states have call successors, (3844), 2175 states have call predecessors, (3844), 2174 states have return successors, (3842), 3714 states have call predecessors, (3842), 3842 states have call successors, (3842) [2022-12-14 10:52:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41965 states to 41965 states and 58827 transitions. [2022-12-14 10:52:33,052 INFO L78 Accepts]: Start accepts. Automaton has 41965 states and 58827 transitions. Word has length 157 [2022-12-14 10:52:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:33,053 INFO L495 AbstractCegarLoop]: Abstraction has 41965 states and 58827 transitions. [2022-12-14 10:52:33,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:52:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 41965 states and 58827 transitions. [2022-12-14 10:52:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 10:52:33,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:33,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-12-14 10:52:33,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:52:33,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:33,309 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1497794632, now seen corresponding path program 1 times [2022-12-14 10:52:33,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:33,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576134491] [2022-12-14 10:52:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 10:52:33,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576134491] [2022-12-14 10:52:33,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576134491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688940672] [2022-12-14 10:52:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:33,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:33,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:33,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:52:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:33,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:52:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:52:33,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:33,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688940672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:33,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:33,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 10:52:33,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807456286] [2022-12-14 10:52:33,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:33,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:33,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:33,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:52:33,741 INFO L87 Difference]: Start difference. First operand 41965 states and 58827 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 10:52:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:36,718 INFO L93 Difference]: Finished difference Result 124387 states and 172223 transitions. [2022-12-14 10:52:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:52:36,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 158 [2022-12-14 10:52:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:36,908 INFO L225 Difference]: With dead ends: 124387 [2022-12-14 10:52:36,908 INFO L226 Difference]: Without dead ends: 84069 [2022-12-14 10:52:36,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:52:36,974 INFO L413 NwaCegarLoop]: 3408 mSDtfsCounter, 3465 mSDsluCounter, 3537 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 6945 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:36,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 6945 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:52:37,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84069 states. [2022-12-14 10:52:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84069 to 83937. [2022-12-14 10:52:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83937 states, 71909 states have (on average 1.4000055625860464) internal successors, (100673), 72296 states have internal predecessors, (100673), 7552 states have call successors, (7552), 4347 states have call predecessors, (7552), 4474 states have return successors, (7934), 7294 states have call predecessors, (7934), 7550 states have call successors, (7934) [2022-12-14 10:52:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83937 states to 83937 states and 116159 transitions. [2022-12-14 10:52:39,871 INFO L78 Accepts]: Start accepts. Automaton has 83937 states and 116159 transitions. Word has length 158 [2022-12-14 10:52:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:39,871 INFO L495 AbstractCegarLoop]: Abstraction has 83937 states and 116159 transitions. [2022-12-14 10:52:39,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 10:52:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 83937 states and 116159 transitions. [2022-12-14 10:52:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 10:52:39,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:39,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:39,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 10:52:40,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:52:40,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 460358853, now seen corresponding path program 1 times [2022-12-14 10:52:40,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:40,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130520293] [2022-12-14 10:52:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:40,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 10:52:40,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130520293] [2022-12-14 10:52:40,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130520293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770670376] [2022-12-14 10:52:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:40,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:40,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:40,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:40,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:52:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:40,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:52:40,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 10:52:40,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:40,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770670376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:40,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:40,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:52:40,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223253222] [2022-12-14 10:52:40,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:40,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:40,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:40,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:52:40,674 INFO L87 Difference]: Start difference. First operand 83937 states and 116159 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:52:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:44,349 INFO L93 Difference]: Finished difference Result 193485 states and 271012 transitions. [2022-12-14 10:52:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:44,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 158 [2022-12-14 10:52:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:44,683 INFO L225 Difference]: With dead ends: 193485 [2022-12-14 10:52:44,683 INFO L226 Difference]: Without dead ends: 111195 [2022-12-14 10:52:44,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:52:44,819 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 93 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6463 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:44,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6463 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111195 states. [2022-12-14 10:52:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111195 to 92909. [2022-12-14 10:52:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92909 states, 80363 states have (on average 1.4280079140898174) internal successors, (114759), 80752 states have internal predecessors, (114759), 7811 states have call successors, (7811), 4606 states have call predecessors, (7811), 4733 states have return successors, (8193), 7551 states have call predecessors, (8193), 7809 states have call successors, (8193) [2022-12-14 10:52:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92909 states to 92909 states and 130763 transitions. [2022-12-14 10:52:47,981 INFO L78 Accepts]: Start accepts. Automaton has 92909 states and 130763 transitions. Word has length 158 [2022-12-14 10:52:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:47,981 INFO L495 AbstractCegarLoop]: Abstraction has 92909 states and 130763 transitions. [2022-12-14 10:52:47,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:52:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 92909 states and 130763 transitions. [2022-12-14 10:52:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 10:52:48,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:48,224 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:48,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:52:48,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:48,425 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash 165400780, now seen corresponding path program 2 times [2022-12-14 10:52:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:48,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626481679] [2022-12-14 10:52:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:48,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 10:52:48,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:48,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626481679] [2022-12-14 10:52:48,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626481679] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:48,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685953127] [2022-12-14 10:52:48,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:52:48,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:48,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:48,545 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:48,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:52:48,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:52:48,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:52:48,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:52:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 10:52:48,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:48,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685953127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:48,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:48,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 10:52:48,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134582538] [2022-12-14 10:52:48,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:48,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:48,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:48,724 INFO L87 Difference]: Start difference. First operand 92909 states and 130763 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:52:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:53,301 INFO L93 Difference]: Finished difference Result 177327 states and 251589 transitions. [2022-12-14 10:52:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:53,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 158 [2022-12-14 10:52:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:53,638 INFO L225 Difference]: With dead ends: 177327 [2022-12-14 10:52:53,638 INFO L226 Difference]: Without dead ends: 130891 [2022-12-14 10:52:53,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:53,719 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 132 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 6581 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:53,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 6581 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:52:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130891 states. [2022-12-14 10:52:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130891 to 109293. [2022-12-14 10:52:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109293 states, 95723 states have (on average 1.4636294307533195) internal successors, (140103), 96112 states have internal predecessors, (140103), 8323 states have call successors, (8323), 5118 states have call predecessors, (8323), 5245 states have return successors, (8705), 8063 states have call predecessors, (8705), 8321 states have call successors, (8705) [2022-12-14 10:52:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109293 states to 109293 states and 157131 transitions. [2022-12-14 10:52:57,687 INFO L78 Accepts]: Start accepts. Automaton has 109293 states and 157131 transitions. Word has length 158 [2022-12-14 10:52:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:57,687 INFO L495 AbstractCegarLoop]: Abstraction has 109293 states and 157131 transitions. [2022-12-14 10:52:57,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:52:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 109293 states and 157131 transitions. [2022-12-14 10:52:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 10:52:57,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:57,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2022-12-14 10:52:57,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:52:58,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:58,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:58,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1561846632, now seen corresponding path program 1 times [2022-12-14 10:52:58,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:58,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888536872] [2022-12-14 10:52:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:58,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 10:52:58,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888536872] [2022-12-14 10:52:58,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888536872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656027235] [2022-12-14 10:52:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:58,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:58,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:58,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:52:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:58,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:52:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 10:52:58,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:58,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656027235] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:58,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:58,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 10:52:58,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762103815] [2022-12-14 10:52:58,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:52:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:52:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:52:58,419 INFO L87 Difference]: Start difference. First operand 109293 states and 157131 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:53:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:05,216 INFO L93 Difference]: Finished difference Result 268477 states and 384537 transitions. [2022-12-14 10:53:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:53:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2022-12-14 10:53:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:05,662 INFO L225 Difference]: With dead ends: 268477 [2022-12-14 10:53:05,662 INFO L226 Difference]: Without dead ends: 160831 [2022-12-14 10:53:05,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:53:05,776 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 7181 mSDsluCounter, 6337 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7197 SdHoareTripleChecker+Valid, 9557 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:05,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7197 Valid, 9557 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:53:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160831 states. [2022-12-14 10:53:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160831 to 160827. [2022-12-14 10:53:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160827 states, 140613 states have (on average 1.4498872792700532) internal successors, (203873), 141194 states have internal predecessors, (203873), 12349 states have call successors, (12349), 7672 states have call predecessors, (12349), 7863 states have return successors, (12923), 11961 states have call predecessors, (12923), 12347 states have call successors, (12923) [2022-12-14 10:53:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160827 states to 160827 states and 229145 transitions. [2022-12-14 10:53:11,834 INFO L78 Accepts]: Start accepts. Automaton has 160827 states and 229145 transitions. Word has length 159 [2022-12-14 10:53:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:11,835 INFO L495 AbstractCegarLoop]: Abstraction has 160827 states and 229145 transitions. [2022-12-14 10:53:11,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:53:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 160827 states and 229145 transitions. [2022-12-14 10:53:12,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 10:53:12,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:12,082 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2022-12-14 10:53:12,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:53:12,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 10:53:12,283 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1465055122, now seen corresponding path program 1 times [2022-12-14 10:53:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:12,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099257239] [2022-12-14 10:53:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 10:53:12,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:12,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099257239] [2022-12-14 10:53:12,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099257239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:53:12,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585968295] [2022-12-14 10:53:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:12,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:12,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:53:12,448 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:53:12,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:53:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:53:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 10:53:12,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:12,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585968295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:12,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:53:12,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 10:53:12,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309717806] [2022-12-14 10:53:12,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:12,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:53:12,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:12,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:53:12,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:53:12,653 INFO L87 Difference]: Start difference. First operand 160827 states and 229145 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:53:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:22,717 INFO L93 Difference]: Finished difference Result 395591 states and 561731 transitions. [2022-12-14 10:53:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:53:22,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2022-12-14 10:53:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:23,337 INFO L225 Difference]: With dead ends: 395591 [2022-12-14 10:53:23,338 INFO L226 Difference]: Without dead ends: 236411 [2022-12-14 10:53:23,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:53:23,538 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 7177 mSDsluCounter, 6332 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7193 SdHoareTripleChecker+Valid, 9552 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:23,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7193 Valid, 9552 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:53:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236411 states. [2022-12-14 10:53:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236411 to 236407. [2022-12-14 10:53:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236407 states, 206297 states have (on average 1.4350814602248214) internal successors, (296053), 207166 states have internal predecessors, (296053), 18321 states have call successors, (18321), 11500 states have call predecessors, (18321), 11787 states have return successors, (19183), 17741 states have call predecessors, (19183), 18319 states have call successors, (19183) [2022-12-14 10:53:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236407 states to 236407 states and 333557 transitions. [2022-12-14 10:53:33,976 INFO L78 Accepts]: Start accepts. Automaton has 236407 states and 333557 transitions. Word has length 161 [2022-12-14 10:53:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:33,977 INFO L495 AbstractCegarLoop]: Abstraction has 236407 states and 333557 transitions. [2022-12-14 10:53:33,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:53:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 236407 states and 333557 transitions. [2022-12-14 10:53:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 10:53:34,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:34,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2022-12-14 10:53:34,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 10:53:34,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 10:53:34,728 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash -551530136, now seen corresponding path program 1 times [2022-12-14 10:53:34,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:34,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297496086] [2022-12-14 10:53:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:34,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 10:53:35,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297496086] [2022-12-14 10:53:35,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297496086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:53:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486105793] [2022-12-14 10:53:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:35,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:35,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:53:35,080 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:53:35,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:53:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:53:35,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 10:53:35,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:35,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486105793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:35,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:53:35,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 10:53:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806786365] [2022-12-14 10:53:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:35,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:53:35,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:53:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:53:35,268 INFO L87 Difference]: Start difference. First operand 236407 states and 333557 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:53:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:44,813 INFO L93 Difference]: Finished difference Result 423424 states and 594406 transitions. [2022-12-14 10:53:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:53:44,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 163 [2022-12-14 10:53:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:45,367 INFO L225 Difference]: With dead ends: 423424 [2022-12-14 10:53:45,367 INFO L226 Difference]: Without dead ends: 188664 [2022-12-14 10:53:45,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:53:45,615 INFO L413 NwaCegarLoop]: 3238 mSDtfsCounter, 7163 mSDsluCounter, 6352 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7179 SdHoareTripleChecker+Valid, 9590 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:45,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7179 Valid, 9590 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:53:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188664 states. [2022-12-14 10:53:53,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188664 to 181469. [2022-12-14 10:53:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181469 states, 158438 states have (on average 1.4313990330602506) internal successors, (226788), 159162 states have internal predecessors, (226788), 13823 states have call successors, (13823), 8631 states have call predecessors, (13823), 9206 states have return successors, (14397), 13676 states have call predecessors, (14397), 13821 states have call successors, (14397) [2022-12-14 10:53:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181469 states to 181469 states and 255008 transitions. [2022-12-14 10:53:54,403 INFO L78 Accepts]: Start accepts. Automaton has 181469 states and 255008 transitions. Word has length 163 [2022-12-14 10:53:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:54,403 INFO L495 AbstractCegarLoop]: Abstraction has 181469 states and 255008 transitions. [2022-12-14 10:53:54,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:53:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 181469 states and 255008 transitions. [2022-12-14 10:53:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 10:53:54,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:54,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-12-14 10:53:54,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 10:53:54,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:54,863 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1449459618, now seen corresponding path program 2 times [2022-12-14 10:53:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:54,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944542972] [2022-12-14 10:53:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:54,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 10:53:55,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:55,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944542972] [2022-12-14 10:53:55,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944542972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:53:55,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571986958] [2022-12-14 10:53:55,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:53:55,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:55,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:53:55,033 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:53:55,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 10:53:55,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:53:55,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:53:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:53:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 10:53:55,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:55,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571986958] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:55,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:53:55,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:53:55,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054290814] [2022-12-14 10:53:55,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:55,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:53:55,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:55,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:53:55,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:53:55,168 INFO L87 Difference]: Start difference. First operand 181469 states and 255008 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:54:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:03,100 INFO L93 Difference]: Finished difference Result 243141 states and 342551 transitions. [2022-12-14 10:54:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:03,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 164 [2022-12-14 10:54:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:03,582 INFO L225 Difference]: With dead ends: 243141 [2022-12-14 10:54:03,582 INFO L226 Difference]: Without dead ends: 173309 [2022-12-14 10:54:03,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:54:03,687 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 46 mSDsluCounter, 3219 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6464 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:03,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6464 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173309 states. [2022-12-14 10:54:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173309 to 162269. [2022-12-14 10:54:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162269 states, 140966 states have (on average 1.4484343742462722) internal successors, (204180), 141258 states have internal predecessors, (204180), 13247 states have call successors, (13247), 8055 states have call predecessors, (13247), 8054 states have return successors, (13245), 12956 states have call predecessors, (13245), 13245 states have call successors, (13245) [2022-12-14 10:54:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162269 states to 162269 states and 230672 transitions. [2022-12-14 10:54:11,895 INFO L78 Accepts]: Start accepts. Automaton has 162269 states and 230672 transitions. Word has length 164 [2022-12-14 10:54:11,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:11,896 INFO L495 AbstractCegarLoop]: Abstraction has 162269 states and 230672 transitions. [2022-12-14 10:54:11,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:54:11,896 INFO L276 IsEmpty]: Start isEmpty. Operand 162269 states and 230672 transitions. [2022-12-14 10:54:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 10:54:12,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:12,145 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-12-14 10:54:12,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 10:54:12,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 10:54:12,346 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:12,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1141296965, now seen corresponding path program 1 times [2022-12-14 10:54:12,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:12,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025230796] [2022-12-14 10:54:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:12,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 10:54:12,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:12,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025230796] [2022-12-14 10:54:12,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025230796] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:12,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822451355] [2022-12-14 10:54:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:12,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:12,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:12,517 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:12,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 10:54:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:12,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:54:12,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 10:54:12,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:12,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822451355] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:12,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:54:12,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 10:54:12,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717717915] [2022-12-14 10:54:12,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:12,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:54:12,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:12,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:54:12,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:54:12,710 INFO L87 Difference]: Start difference. First operand 162269 states and 230672 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:25,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:25,308 INFO L93 Difference]: Finished difference Result 398489 states and 564306 transitions. [2022-12-14 10:54:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:54:25,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 164 [2022-12-14 10:54:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:25,929 INFO L225 Difference]: With dead ends: 398489 [2022-12-14 10:54:25,929 INFO L226 Difference]: Without dead ends: 237921 [2022-12-14 10:54:26,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:54:26,245 INFO L413 NwaCegarLoop]: 3219 mSDtfsCounter, 7183 mSDsluCounter, 6347 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7199 SdHoareTripleChecker+Valid, 9566 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:26,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7199 Valid, 9566 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:54:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237921 states. [2022-12-14 10:54:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237921 to 237917. [2022-12-14 10:54:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237917 states, 206206 states have (on average 1.4310931786659942) internal successors, (295100), 206642 states have internal predecessors, (295100), 19639 states have call successors, (19639), 12071 states have call predecessors, (19639), 12070 states have return successors, (19637), 19204 states have call predecessors, (19637), 19637 states have call successors, (19637) [2022-12-14 10:54:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237917 states to 237917 states and 334376 transitions. [2022-12-14 10:54:39,465 INFO L78 Accepts]: Start accepts. Automaton has 237917 states and 334376 transitions. Word has length 164 [2022-12-14 10:54:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:39,465 INFO L495 AbstractCegarLoop]: Abstraction has 237917 states and 334376 transitions. [2022-12-14 10:54:39,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:39,465 INFO L276 IsEmpty]: Start isEmpty. Operand 237917 states and 334376 transitions. [2022-12-14 10:54:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 10:54:39,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:39,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-12-14 10:54:39,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 10:54:40,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:40,160 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1766024393, now seen corresponding path program 1 times [2022-12-14 10:54:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:40,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537106722] [2022-12-14 10:54:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:40,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 10:54:40,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537106722] [2022-12-14 10:54:40,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537106722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292565933] [2022-12-14 10:54:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:40,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:40,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:40,344 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:40,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:54:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:54:40,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 10:54:40,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:40,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292565933] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:40,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:54:40,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 10:54:40,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936944507] [2022-12-14 10:54:40,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:40,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:54:40,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:54:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:54:40,540 INFO L87 Difference]: Start difference. First operand 237917 states and 334376 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:55:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:55:00,573 INFO L93 Difference]: Finished difference Result 586253 states and 821814 transitions. [2022-12-14 10:55:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:55:00,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 166 [2022-12-14 10:55:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:55:01,520 INFO L225 Difference]: With dead ends: 586253 [2022-12-14 10:55:01,521 INFO L226 Difference]: Without dead ends: 350037 [2022-12-14 10:55:01,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:55:01,934 INFO L413 NwaCegarLoop]: 3231 mSDtfsCounter, 7156 mSDsluCounter, 6327 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7172 SdHoareTripleChecker+Valid, 9558 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:55:01,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7172 Valid, 9558 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:55:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350037 states. [2022-12-14 10:55:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350037 to 350033. [2022-12-14 10:55:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350033 states, 302834 states have (on average 1.415508166190058) internal successors, (428664), 303486 states have internal predecessors, (428664), 29111 states have call successors, (29111), 18087 states have call predecessors, (29111), 18086 states have return successors, (29109), 28460 states have call predecessors, (29109), 29109 states have call successors, (29109) [2022-12-14 10:55:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350033 states to 350033 states and 486884 transitions. [2022-12-14 10:55:23,663 INFO L78 Accepts]: Start accepts. Automaton has 350033 states and 486884 transitions. Word has length 166 [2022-12-14 10:55:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:55:23,664 INFO L495 AbstractCegarLoop]: Abstraction has 350033 states and 486884 transitions. [2022-12-14 10:55:23,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:55:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 350033 states and 486884 transitions. [2022-12-14 10:55:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 10:55:24,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:55:24,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:55:24,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 10:55:24,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:55:24,567 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:55:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:55:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1673718958, now seen corresponding path program 1 times [2022-12-14 10:55:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:55:24,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505238219] [2022-12-14 10:55:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:24,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:55:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 25 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 10:55:24,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:55:24,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505238219] [2022-12-14 10:55:24,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505238219] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:55:24,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123952466] [2022-12-14 10:55:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:24,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:55:24,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:55:24,807 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:55:24,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 10:55:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:24,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:55:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:55:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 10:55:24,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:55:24,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123952466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:55:24,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:55:24,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:55:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364705394] [2022-12-14 10:55:24,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:55:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:55:24,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:55:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:55:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:55:24,934 INFO L87 Difference]: Start difference. First operand 350033 states and 486884 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:55:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:55:50,521 INFO L93 Difference]: Finished difference Result 678233 states and 950914 transitions. [2022-12-14 10:55:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:55:50,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 164 [2022-12-14 10:55:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:55:51,918 INFO L225 Difference]: With dead ends: 678233 [2022-12-14 10:55:51,919 INFO L226 Difference]: Without dead ends: 444829 [2022-12-14 10:55:52,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:55:52,267 INFO L413 NwaCegarLoop]: 3345 mSDtfsCounter, 123 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 6575 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:55:52,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 6575 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:55:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444829 states. [2022-12-14 10:56:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444829 to 405113. [2022-12-14 10:56:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405113 states, 354026 states have (on average 1.4350471434301435) internal successors, (508044), 354678 states have internal predecessors, (508044), 31055 states have call successors, (31055), 20031 states have call predecessors, (31055), 20030 states have return successors, (31053), 30404 states have call predecessors, (31053), 31053 states have call successors, (31053) [2022-12-14 10:56:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405113 states to 405113 states and 570152 transitions. [2022-12-14 10:56:17,448 INFO L78 Accepts]: Start accepts. Automaton has 405113 states and 570152 transitions. Word has length 164 [2022-12-14 10:56:17,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:17,448 INFO L495 AbstractCegarLoop]: Abstraction has 405113 states and 570152 transitions. [2022-12-14 10:56:17,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:56:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 405113 states and 570152 transitions. [2022-12-14 10:56:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 10:56:18,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:18,265 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:56:18,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 10:56:18,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:56:18,468 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:56:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1591206062, now seen corresponding path program 1 times [2022-12-14 10:56:18,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:56:18,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957208165] [2022-12-14 10:56:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:18,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:56:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 17 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 10:56:18,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:56:18,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957208165] [2022-12-14 10:56:18,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957208165] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:56:18,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720348260] [2022-12-14 10:56:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:18,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:56:18,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:56:18,632 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:56:18,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 10:56:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:18,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:56:18,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:56:18,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:56:18,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720348260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:56:18,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:56:18,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:56:18,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898543428] [2022-12-14 10:56:18,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:56:18,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:56:18,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:56:18,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:56:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:56:18,792 INFO L87 Difference]: Start difference. First operand 405113 states and 570152 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:56:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:43,762 INFO L93 Difference]: Finished difference Result 694249 states and 989826 transitions. [2022-12-14 10:56:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:56:43,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 166 [2022-12-14 10:56:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:45,035 INFO L225 Difference]: With dead ends: 694249 [2022-12-14 10:56:45,035 INFO L226 Difference]: Without dead ends: 405765 [2022-12-14 10:56:45,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:56:45,436 INFO L413 NwaCegarLoop]: 3353 mSDtfsCounter, 156 mSDsluCounter, 3213 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 6566 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:45,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 6566 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:56:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405765 states. [2022-12-14 10:57:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405765 to 402521. [2022-12-14 10:57:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402521 states, 351434 states have (on average 1.4210463415605776) internal successors, (499404), 352086 states have internal predecessors, (499404), 31055 states have call successors, (31055), 20031 states have call predecessors, (31055), 20030 states have return successors, (31053), 30404 states have call predecessors, (31053), 31053 states have call successors, (31053) [2022-12-14 10:57:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402521 states to 402521 states and 561512 transitions. [2022-12-14 10:57:10,289 INFO L78 Accepts]: Start accepts. Automaton has 402521 states and 561512 transitions. Word has length 166 [2022-12-14 10:57:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:10,290 INFO L495 AbstractCegarLoop]: Abstraction has 402521 states and 561512 transitions. [2022-12-14 10:57:10,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:57:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 402521 states and 561512 transitions. [2022-12-14 10:57:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 10:57:11,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:11,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-12-14 10:57:11,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 10:57:11,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 10:57:11,307 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:57:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1516822060, now seen corresponding path program 1 times [2022-12-14 10:57:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:11,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189959666] [2022-12-14 10:57:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:11,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 10:57:11,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189959666] [2022-12-14 10:57:11,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189959666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200128977] [2022-12-14 10:57:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:11,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:11,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:11,463 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:11,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 10:57:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:11,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:57:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 10:57:11,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:57:11,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200128977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:11,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:57:11,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 10:57:11,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815704352] [2022-12-14 10:57:11,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:11,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:57:11,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:11,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:57:11,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:57:11,641 INFO L87 Difference]: Start difference. First operand 402521 states and 561512 transitions. Second operand has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:57:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:47,716 INFO L93 Difference]: Finished difference Result 959429 states and 1332366 transitions. [2022-12-14 10:57:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:57:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 166 [2022-12-14 10:57:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:49,419 INFO L225 Difference]: With dead ends: 959429 [2022-12-14 10:57:49,420 INFO L226 Difference]: Without dead ends: 558609 [2022-12-14 10:57:49,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:57:49,924 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 7145 mSDsluCounter, 6320 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7161 SdHoareTripleChecker+Valid, 9549 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:49,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7161 Valid, 9549 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:57:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558609 states. [2022-12-14 10:58:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558609 to 558605. [2022-12-14 10:58:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558605 states, 485128 states have (on average 1.400628287792088) internal successors, (679484), 486104 states have internal predecessors, (679484), 44761 states have call successors, (44761), 28715 states have call predecessors, (44761), 28714 states have return successors, (44759), 43786 states have call predecessors, (44759), 44759 states have call successors, (44759) [2022-12-14 10:58:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558605 states to 558605 states and 769004 transitions. [2022-12-14 10:58:27,986 INFO L78 Accepts]: Start accepts. Automaton has 558605 states and 769004 transitions. Word has length 166 [2022-12-14 10:58:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:27,987 INFO L495 AbstractCegarLoop]: Abstraction has 558605 states and 769004 transitions. [2022-12-14 10:58:27,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:58:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 558605 states and 769004 transitions. [2022-12-14 10:58:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 10:58:28,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:28,808 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-12-14 10:58:28,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 10:58:29,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 10:58:29,010 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:58:29,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:29,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1559273541, now seen corresponding path program 1 times [2022-12-14 10:58:29,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:29,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618479949] [2022-12-14 10:58:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:29,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 10:58:29,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618479949] [2022-12-14 10:58:29,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618479949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835772286] [2022-12-14 10:58:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:29,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:29,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:29,317 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:29,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 10:58:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:29,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:58:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 10:58:29,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:58:29,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835772286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:58:29,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:58:29,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 10:58:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409224502] [2022-12-14 10:58:29,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:58:29,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:58:29,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:58:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:58:29,507 INFO L87 Difference]: Start difference. First operand 558605 states and 769004 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:59:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:25,657 INFO L93 Difference]: Finished difference Result 1375382 states and 1887666 transitions. [2022-12-14 10:59:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:59:25,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 168 [2022-12-14 10:59:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:28,197 INFO L225 Difference]: With dead ends: 1375382 [2022-12-14 10:59:28,197 INFO L226 Difference]: Without dead ends: 818478 [2022-12-14 10:59:29,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:59:29,144 INFO L413 NwaCegarLoop]: 3218 mSDtfsCounter, 3785 mSDsluCounter, 6420 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 9638 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:29,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 9638 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:59:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818478 states. [2022-12-14 11:00:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818478 to 818474. [2022-12-14 11:00:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818474 states, 709127 states have (on average 1.3804974285283171) internal successors, (978948), 710589 states have internal predecessors, (978948), 66341 states have call successors, (66341), 43005 states have call predecessors, (66341), 43004 states have return successors, (66339), 64880 states have call predecessors, (66339), 66339 states have call successors, (66339) [2022-12-14 11:00:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818474 states to 818474 states and 1111628 transitions. [2022-12-14 11:00:30,484 INFO L78 Accepts]: Start accepts. Automaton has 818474 states and 1111628 transitions. Word has length 168 [2022-12-14 11:00:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:00:30,484 INFO L495 AbstractCegarLoop]: Abstraction has 818474 states and 1111628 transitions. [2022-12-14 11:00:30,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:00:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 818474 states and 1111628 transitions. [2022-12-14 11:00:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 11:00:31,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:00:31,840 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-12-14 11:00:31,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 11:00:32,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 11:00:32,041 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:00:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:00:32,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1270070943, now seen corresponding path program 1 times [2022-12-14 11:00:32,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:00:32,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604109956] [2022-12-14 11:00:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:00:32,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:00:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 55 proven. 19 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 11:00:32,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:00:32,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604109956] [2022-12-14 11:00:32,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604109956] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:00:32,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896242697] [2022-12-14 11:00:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:00:32,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:00:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:00:32,174 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:00:32,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baaef996-b085-4239-bfbd-4902a6cb6d4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 11:00:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:00:32,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:00:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:00:32,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:00:32,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896242697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:00:32,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:00:32,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 11:00:32,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443219301] [2022-12-14 11:00:32,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:00:32,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:00:32,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:00:32,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:00:32,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:00:32,383 INFO L87 Difference]: Start difference. First operand 818474 states and 1111628 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 11:01:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:45,516 INFO L93 Difference]: Finished difference Result 1543867 states and 2103334 transitions. [2022-12-14 11:01:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:01:45,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 170 [2022-12-14 11:01:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted.