./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e5dd58415aac7d1d5a1692f51a0046cae2819bd35dc6a9ac29c06647e84dab1f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:04:15,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:04:15,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:04:16,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:04:16,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:04:16,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:04:16,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:04:16,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:04:16,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:04:16,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:04:16,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:04:16,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:04:16,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:04:16,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:04:16,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:04:16,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:04:16,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:04:16,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:04:16,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:04:16,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:04:16,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:04:16,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:04:16,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:04:16,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:04:16,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:04:16,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:04:16,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:04:16,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:04:16,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:04:16,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:04:16,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:04:16,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:04:16,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:04:16,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:04:16,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:04:16,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:04:16,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:04:16,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:04:16,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:04:16,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:04:16,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:04:16,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:04:16,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:04:16,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:04:16,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:04:16,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:04:16,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:04:16,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:04:16,185 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:04:16,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:04:16,186 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:04:16,186 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:04:16,187 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:04:16,188 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:04:16,188 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:04:16,188 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:04:16,188 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:04:16,189 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:04:16,189 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:04:16,189 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:04:16,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:04:16,190 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:04:16,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:04:16,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:04:16,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:04:16,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:04:16,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:04:16,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:04:16,193 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:04:16,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:04:16,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:04:16,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:04:16,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:04:16,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:04:16,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:04:16,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:04:16,195 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:04:16,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:04:16,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:04:16,196 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:04:16,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:04:16,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:04:16,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:04:16,197 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_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5dd58415aac7d1d5a1692f51a0046cae2819bd35dc6a9ac29c06647e84dab1f [2022-11-23 14:04:16,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:04:16,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:04:16,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:04:16,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:04:16,609 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:04:16,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c [2022-11-23 14:04:19,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:04:20,706 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:04:20,707 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c [2022-11-23 14:04:20,774 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/data/ebe0f4d0e/f58f5d06e8ed479d8ecf684782302e85/FLAGc33f2cac5 [2022-11-23 14:04:20,792 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/data/ebe0f4d0e/f58f5d06e8ed479d8ecf684782302e85 [2022-11-23 14:04:20,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:04:20,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:04:20,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:04:20,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:04:20,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:04:20,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:04:20" (1/1) ... [2022-11-23 14:04:20,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5e5486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:20, skipping insertion in model container [2022-11-23 14:04:20,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:04:20" (1/1) ... [2022-11-23 14:04:20,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:04:21,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:04:23,593 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_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c[377340,377353] [2022-11-23 14:04:23,631 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_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c[383339,383352] [2022-11-23 14:04:23,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:04:23,852 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:04:25,113 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_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c[377340,377353] [2022-11-23 14:04:25,123 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_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c[383339,383352] [2022-11-23 14:04:25,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:04:25,215 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:04:25,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25 WrapperNode [2022-11-23 14:04:25,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:04:25,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:04:25,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:04:25,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:04:25,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:25,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:25,821 INFO L138 Inliner]: procedures = 46, calls = 44, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 12561 [2022-11-23 14:04:25,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:04:25,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:04:25,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:04:25,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:04:25,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:25,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:25,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:25,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:26,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:26,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:26,428 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:26,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:26,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:04:26,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:04:26,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:04:26,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:04:26,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (1/1) ... [2022-11-23 14:04:26,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:04:26,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:26,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:04:26,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:04:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:04:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-23 14:04:26,807 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-23 14:04:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-23 14:04:26,807 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-23 14:04:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 14:04:26,807 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 14:04:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-23 14:04:26,808 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-23 14:04:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-23 14:04:26,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-23 14:04:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:04:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-23 14:04:26,809 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-23 14:04:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:04:26,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:04:26,987 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:04:26,990 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:04:37,079 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:04:39,521 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:04:39,521 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-23 14:04:39,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:04:39 BoogieIcfgContainer [2022-11-23 14:04:39,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:04:39,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:04:39,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:04:39,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:04:39,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:04:20" (1/3) ... [2022-11-23 14:04:39,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3032525e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:04:39, skipping insertion in model container [2022-11-23 14:04:39,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:25" (2/3) ... [2022-11-23 14:04:39,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3032525e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:04:39, skipping insertion in model container [2022-11-23 14:04:39,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:04:39" (3/3) ... [2022-11-23 14:04:39,541 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.01.cil-1.c [2022-11-23 14:04:39,567 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:04:39,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 14:04:39,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:04:39,685 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;@5174fe50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:04:39,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 14:04:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 1710 states, 1686 states have (on average 1.9792408066429419) internal successors, (3337), 1689 states have internal predecessors, (3337), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 14:04:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:04:39,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:39,710 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] [2022-11-23 14:04:39,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1345616383, now seen corresponding path program 1 times [2022-11-23 14:04:39,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:39,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945432151] [2022-11-23 14:04:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:39,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:04:40,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:40,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945432151] [2022-11-23 14:04:40,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945432151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:40,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:04:40,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:04:40,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603280611] [2022-11-23 14:04:40,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:40,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:04:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:04:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:04:40,208 INFO L87 Difference]: Start difference. First operand has 1710 states, 1686 states have (on average 1.9792408066429419) internal successors, (3337), 1689 states have internal predecessors, (3337), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:04:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:41,413 INFO L93 Difference]: Finished difference Result 3470 states and 6811 transitions. [2022-11-23 14:04:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:04:41,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-11-23 14:04:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:41,435 INFO L225 Difference]: With dead ends: 3470 [2022-11-23 14:04:41,435 INFO L226 Difference]: Without dead ends: 1759 [2022-11-23 14:04:41,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:04:41,446 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 3416 mSDsluCounter, 3127 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3416 SdHoareTripleChecker+Valid, 6308 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:41,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3416 Valid, 6308 Invalid, 564 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:04:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-11-23 14:04:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1758. [2022-11-23 14:04:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1718 states have (on average 1.960419091967404) internal successors, (3368), 1721 states have internal predecessors, (3368), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-23 14:04:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 3420 transitions. [2022-11-23 14:04:41,580 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 3420 transitions. Word has length 34 [2022-11-23 14:04:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:41,580 INFO L495 AbstractCegarLoop]: Abstraction has 1758 states and 3420 transitions. [2022-11-23 14:04:41,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:04:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 3420 transitions. [2022-11-23 14:04:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-23 14:04:41,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:41,585 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:04:41,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:04:41,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:41,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:41,587 INFO L85 PathProgramCache]: Analyzing trace with hash -798269258, now seen corresponding path program 1 times [2022-11-23 14:04:41,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:41,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789393699] [2022-11-23 14:04:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:41,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:04:42,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:42,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789393699] [2022-11-23 14:04:42,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789393699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:42,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:04:42,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:04:42,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622298276] [2022-11-23 14:04:42,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:42,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:04:42,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:04:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:04:42,336 INFO L87 Difference]: Start difference. First operand 1758 states and 3420 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:04:43,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:43,399 INFO L93 Difference]: Finished difference Result 1980 states and 3707 transitions. [2022-11-23 14:04:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:04:43,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2022-11-23 14:04:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:43,417 INFO L225 Difference]: With dead ends: 1980 [2022-11-23 14:04:43,418 INFO L226 Difference]: Without dead ends: 1869 [2022-11-23 14:04:43,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:04:43,422 INFO L413 NwaCegarLoop]: 3144 mSDtfsCounter, 3424 mSDsluCounter, 6214 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3433 SdHoareTripleChecker+Valid, 9358 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:43,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3433 Valid, 9358 Invalid, 845 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [75 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:04:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-11-23 14:04:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1855. [2022-11-23 14:04:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1783 states have (on average 1.9332585530005608) internal successors, (3447), 1787 states have internal predecessors, (3447), 46 states have call successors, (46), 24 states have call predecessors, (46), 24 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 14:04:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 3539 transitions. [2022-11-23 14:04:43,495 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 3539 transitions. Word has length 59 [2022-11-23 14:04:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:43,496 INFO L495 AbstractCegarLoop]: Abstraction has 1855 states and 3539 transitions. [2022-11-23 14:04:43,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:04:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 3539 transitions. [2022-11-23 14:04:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 14:04:43,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:43,500 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:04:43,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:04:43,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash 346696453, now seen corresponding path program 1 times [2022-11-23 14:04:43,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:43,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546600831] [2022-11-23 14:04:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:43,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:04:43,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:43,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546600831] [2022-11-23 14:04:43,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546600831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:43,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:04:43,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:04:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161867409] [2022-11-23 14:04:43,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:43,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:43,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:43,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:43,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:04:43,731 INFO L87 Difference]: Start difference. First operand 1855 states and 3539 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:04:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:44,362 INFO L93 Difference]: Finished difference Result 2015 states and 3741 transitions. [2022-11-23 14:04:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:44,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2022-11-23 14:04:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:44,379 INFO L225 Difference]: With dead ends: 2015 [2022-11-23 14:04:44,379 INFO L226 Difference]: Without dead ends: 1905 [2022-11-23 14:04:44,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:04:44,391 INFO L413 NwaCegarLoop]: 3156 mSDtfsCounter, 27 mSDsluCounter, 3126 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6282 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:44,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6282 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:04:44,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2022-11-23 14:04:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1875. [2022-11-23 14:04:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1799 states have (on average 1.9282934963868816) internal successors, (3469), 1803 states have internal predecessors, (3469), 48 states have call successors, (48), 26 states have call predecessors, (48), 26 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-23 14:04:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 3565 transitions. [2022-11-23 14:04:44,486 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 3565 transitions. Word has length 60 [2022-11-23 14:04:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:44,489 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 3565 transitions. [2022-11-23 14:04:44,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:04:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 3565 transitions. [2022-11-23 14:04:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-23 14:04:44,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:44,497 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:04:44,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:04:44,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:44,498 INFO L85 PathProgramCache]: Analyzing trace with hash -466975867, now seen corresponding path program 1 times [2022-11-23 14:04:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:44,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203475650] [2022-11-23 14:04:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:44,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:04:44,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:44,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203475650] [2022-11-23 14:04:44,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203475650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:44,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:04:44,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:04:44,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916509996] [2022-11-23 14:04:44,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:44,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:44,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:04:44,607 INFO L87 Difference]: Start difference. First operand 1875 states and 3565 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:04:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:45,171 INFO L93 Difference]: Finished difference Result 2218 states and 4003 transitions. [2022-11-23 14:04:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 76 [2022-11-23 14:04:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:45,182 INFO L225 Difference]: With dead ends: 2218 [2022-11-23 14:04:45,182 INFO L226 Difference]: Without dead ends: 1989 [2022-11-23 14:04:45,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:04:45,185 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 3323 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:45,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 3218 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:04:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2022-11-23 14:04:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1984. [2022-11-23 14:04:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1874 states have (on average 1.8986125933831377) internal successors, (3558), 1879 states have internal predecessors, (3558), 69 states have call successors, (69), 39 states have call predecessors, (69), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-23 14:04:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 3696 transitions. [2022-11-23 14:04:45,290 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 3696 transitions. Word has length 76 [2022-11-23 14:04:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:45,290 INFO L495 AbstractCegarLoop]: Abstraction has 1984 states and 3696 transitions. [2022-11-23 14:04:45,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:04:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 3696 transitions. [2022-11-23 14:04:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 14:04:45,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:45,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:04:45,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:04:45,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2033966518, now seen corresponding path program 1 times [2022-11-23 14:04:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:45,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210904799] [2022-11-23 14:04:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:45,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 14:04:45,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:45,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210904799] [2022-11-23 14:04:45,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210904799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:45,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956582004] [2022-11-23 14:04:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:45,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:45,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:45,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:45,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:04:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:04:45,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:04:45,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:04:45,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956582004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:45,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:04:45,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 14:04:45,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857716568] [2022-11-23 14:04:45,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:45,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:45,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:45,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:04:45,690 INFO L87 Difference]: Start difference. First operand 1984 states and 3696 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 14:04:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:46,380 INFO L93 Difference]: Finished difference Result 2285 states and 4077 transitions. [2022-11-23 14:04:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:46,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2022-11-23 14:04:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:46,393 INFO L225 Difference]: With dead ends: 2285 [2022-11-23 14:04:46,393 INFO L226 Difference]: Without dead ends: 2057 [2022-11-23 14:04:46,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:04:46,396 INFO L413 NwaCegarLoop]: 3156 mSDtfsCounter, 35 mSDsluCounter, 3128 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6284 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:46,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6284 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:04:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2022-11-23 14:04:46,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2010. [2022-11-23 14:04:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1894 states have (on average 1.892819429778247) internal successors, (3585), 1899 states have internal predecessors, (3585), 72 states have call successors, (72), 42 states have call predecessors, (72), 42 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-23 14:04:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3729 transitions. [2022-11-23 14:04:46,521 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3729 transitions. Word has length 87 [2022-11-23 14:04:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:46,522 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 3729 transitions. [2022-11-23 14:04:46,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 14:04:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3729 transitions. [2022-11-23 14:04:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 14:04:46,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:46,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:04:46,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:46,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:46,734 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash -59473404, now seen corresponding path program 2 times [2022-11-23 14:04:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:46,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482913280] [2022-11-23 14:04:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:04:47,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:47,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482913280] [2022-11-23 14:04:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482913280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:47,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570182725] [2022-11-23 14:04:47,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:04:47,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:47,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:47,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:47,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:04:47,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:04:47,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:04:47,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:04:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:04:47,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:04:47,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570182725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:47,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:04:47,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:04:47,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989053509] [2022-11-23 14:04:47,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:47,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:47,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:47,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:47,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:04:47,214 INFO L87 Difference]: Start difference. First operand 2010 states and 3729 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:04:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:47,891 INFO L93 Difference]: Finished difference Result 2268 states and 4070 transitions. [2022-11-23 14:04:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2022-11-23 14:04:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:47,904 INFO L225 Difference]: With dead ends: 2268 [2022-11-23 14:04:47,904 INFO L226 Difference]: Without dead ends: 2014 [2022-11-23 14:04:47,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:04:47,911 INFO L413 NwaCegarLoop]: 3157 mSDtfsCounter, 66 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6274 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:47,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6274 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:04:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-11-23 14:04:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 2008. [2022-11-23 14:04:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 1892 states have (on average 1.8884778012684988) internal successors, (3573), 1897 states have internal predecessors, (3573), 72 states have call successors, (72), 42 states have call predecessors, (72), 42 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-23 14:04:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 3717 transitions. [2022-11-23 14:04:48,034 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 3717 transitions. Word has length 87 [2022-11-23 14:04:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:48,035 INFO L495 AbstractCegarLoop]: Abstraction has 2008 states and 3717 transitions. [2022-11-23 14:04:48,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:04:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 3717 transitions. [2022-11-23 14:04:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 14:04:48,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:48,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:04:48,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:48,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:48,253 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:48,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1244127866, now seen corresponding path program 1 times [2022-11-23 14:04:48,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:48,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115860751] [2022-11-23 14:04:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:48,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:04:48,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:48,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115860751] [2022-11-23 14:04:48,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115860751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:48,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005764266] [2022-11-23 14:04:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:48,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:48,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:48,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:48,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:04:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:48,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:04:48,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:04:48,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:04:48,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005764266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:48,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:04:48,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:04:48,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409477718] [2022-11-23 14:04:48,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:48,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:48,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:04:48,695 INFO L87 Difference]: Start difference. First operand 2008 states and 3717 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:04:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:49,277 INFO L93 Difference]: Finished difference Result 2312 states and 4089 transitions. [2022-11-23 14:04:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:49,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2022-11-23 14:04:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:49,289 INFO L225 Difference]: With dead ends: 2312 [2022-11-23 14:04:49,290 INFO L226 Difference]: Without dead ends: 2069 [2022-11-23 14:04:49,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:04:49,293 INFO L413 NwaCegarLoop]: 3131 mSDtfsCounter, 3333 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3333 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:49,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3333 Valid, 3145 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:04:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2022-11-23 14:04:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 2069. [2022-11-23 14:04:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1943 states have (on average 1.8667009778692742) internal successors, (3627), 1948 states have internal predecessors, (3627), 74 states have call successors, (74), 50 states have call predecessors, (74), 50 states have return successors, (74), 71 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-23 14:04:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3775 transitions. [2022-11-23 14:04:49,429 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3775 transitions. Word has length 87 [2022-11-23 14:04:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:49,429 INFO L495 AbstractCegarLoop]: Abstraction has 2069 states and 3775 transitions. [2022-11-23 14:04:49,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:04:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3775 transitions. [2022-11-23 14:04:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 14:04:49,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:49,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:04:49,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:49,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:49,642 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:49,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1572943127, now seen corresponding path program 1 times [2022-11-23 14:04:49,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:49,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713492022] [2022-11-23 14:04:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:49,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:04:49,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:49,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713492022] [2022-11-23 14:04:49,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713492022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:49,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58923434] [2022-11-23 14:04:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:49,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:49,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:49,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:49,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:04:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:50,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:04:50,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:04:50,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:04:50,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58923434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:50,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:04:50,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:04:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304822380] [2022-11-23 14:04:50,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:50,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:50,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:04:50,079 INFO L87 Difference]: Start difference. First operand 2069 states and 3775 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:04:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:50,908 INFO L93 Difference]: Finished difference Result 2652 states and 4468 transitions. [2022-11-23 14:04:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 88 [2022-11-23 14:04:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:50,923 INFO L225 Difference]: With dead ends: 2652 [2022-11-23 14:04:50,924 INFO L226 Difference]: Without dead ends: 2230 [2022-11-23 14:04:50,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:04:50,927 INFO L413 NwaCegarLoop]: 3144 mSDtfsCounter, 31 mSDsluCounter, 3118 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 6262 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:50,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 6262 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:04:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2022-11-23 14:04:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2113. [2022-11-23 14:04:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 1975 states have (on average 1.8562025316455697) internal successors, (3666), 1981 states have internal predecessors, (3666), 80 states have call successors, (80), 56 states have call predecessors, (80), 56 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-23 14:04:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 3826 transitions. [2022-11-23 14:04:51,030 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 3826 transitions. Word has length 88 [2022-11-23 14:04:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:51,032 INFO L495 AbstractCegarLoop]: Abstraction has 2113 states and 3826 transitions. [2022-11-23 14:04:51,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:04:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 3826 transitions. [2022-11-23 14:04:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 14:04:51,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:51,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:04:51,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:51,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 14:04:51,242 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:51,243 INFO L85 PathProgramCache]: Analyzing trace with hash 145225412, now seen corresponding path program 1 times [2022-11-23 14:04:51,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:51,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478382100] [2022-11-23 14:04:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:51,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:04:51,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:51,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478382100] [2022-11-23 14:04:51,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478382100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:51,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:04:51,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:04:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310228379] [2022-11-23 14:04:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:51,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:04:51,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:04:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:04:51,486 INFO L87 Difference]: Start difference. First operand 2113 states and 3826 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:04:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:52,279 INFO L93 Difference]: Finished difference Result 2846 states and 4708 transitions. [2022-11-23 14:04:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:04:52,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2022-11-23 14:04:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:52,290 INFO L225 Difference]: With dead ends: 2846 [2022-11-23 14:04:52,291 INFO L226 Difference]: Without dead ends: 2607 [2022-11-23 14:04:52,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:04:52,295 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 3395 mSDsluCounter, 3151 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 6337 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:52,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3395 Valid, 6337 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:04:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2022-11-23 14:04:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2414. [2022-11-23 14:04:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2190 states have (on average 1.7945205479452055) internal successors, (3930), 2195 states have internal predecessors, (3930), 131 states have call successors, (131), 91 states have call predecessors, (131), 91 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-11-23 14:04:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 4192 transitions. [2022-11-23 14:04:52,442 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 4192 transitions. Word has length 89 [2022-11-23 14:04:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:52,443 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 4192 transitions. [2022-11-23 14:04:52,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:04:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 4192 transitions. [2022-11-23 14:04:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 14:04:52,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:52,447 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-11-23 14:04:52,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:04:52,448 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1080575281, now seen corresponding path program 1 times [2022-11-23 14:04:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:52,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624273636] [2022-11-23 14:04:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:52,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:04:52,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:52,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624273636] [2022-11-23 14:04:52,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624273636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:52,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079392072] [2022-11-23 14:04:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:52,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:52,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:52,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:52,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:04:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:52,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:04:52,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 50 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:04:53,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:04:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:04:53,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079392072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:04:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026665739] [2022-11-23 14:04:53,345 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-23 14:04:53,345 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:04:53,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:04:53,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:04:53,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:05:00,727 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 52 for LOIs [2022-11-23 14:05:00,736 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 172 for LOIs [2022-11-23 14:05:01,085 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 156 for LOIs [2022-11-23 14:05:01,143 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 95 for LOIs [2022-11-23 14:05:01,159 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 69 for LOIs [2022-11-23 14:05:01,258 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 52 for LOIs [2022-11-23 14:05:01,456 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:05:15,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48081#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (not (= (+ ~local~0 1) ~token~0)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-11-23 14:05:15,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:05:15,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:05:15,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 16 [2022-11-23 14:05:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583058313] [2022-11-23 14:05:15,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:15,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 14:05:15,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 14:05:15,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2933, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 14:05:15,824 INFO L87 Difference]: Start difference. First operand 2414 states and 4192 transitions. Second operand has 16 states, 13 states have (on average 7.230769230769231) internal successors, (94), 14 states have internal predecessors, (94), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-11-23 14:05:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:18,768 INFO L93 Difference]: Finished difference Result 3232 states and 5193 transitions. [2022-11-23 14:05:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-23 14:05:18,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 7.230769230769231) internal successors, (94), 14 states have internal predecessors, (94), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 98 [2022-11-23 14:05:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:18,780 INFO L225 Difference]: With dead ends: 3232 [2022-11-23 14:05:18,780 INFO L226 Difference]: Without dead ends: 2461 [2022-11-23 14:05:18,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 264 SyntacticMatches, 9 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5703 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1126, Invalid=12214, Unknown=0, NotChecked=0, Total=13340 [2022-11-23 14:05:18,788 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 13541 mSDsluCounter, 19462 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13545 SdHoareTripleChecker+Valid, 22692 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:18,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13545 Valid, 22692 Invalid, 2502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [225 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 14:05:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-11-23 14:05:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2271. [2022-11-23 14:05:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2095 states have (on average 1.8181384248210024) internal successors, (3809), 2099 states have internal predecessors, (3809), 99 states have call successors, (99), 75 states have call predecessors, (99), 75 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-23 14:05:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 4007 transitions. [2022-11-23 14:05:18,896 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 4007 transitions. Word has length 98 [2022-11-23 14:05:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:18,897 INFO L495 AbstractCegarLoop]: Abstraction has 2271 states and 4007 transitions. [2022-11-23 14:05:18,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 7.230769230769231) internal successors, (94), 14 states have internal predecessors, (94), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-11-23 14:05:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 4007 transitions. [2022-11-23 14:05:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 14:05:18,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:18,900 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:18,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:19,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:19,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1905007033, now seen corresponding path program 1 times [2022-11-23 14:05:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176032778] [2022-11-23 14:05:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:05:19,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176032778] [2022-11-23 14:05:19,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176032778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:19,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350973713] [2022-11-23 14:05:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:19,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:19,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:19,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:19,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:05:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:19,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:05:19,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:05:20,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 14:05:20,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350973713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:20,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203630647] [2022-11-23 14:05:20,951 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-23 14:05:20,951 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:05:20,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:05:20,952 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:05:20,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:05:27,372 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 152 for LOIs [2022-11-23 14:05:28,676 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 172 for LOIs [2022-11-23 14:05:28,941 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 156 for LOIs [2022-11-23 14:05:28,980 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 103 for LOIs [2022-11-23 14:05:28,998 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 69 for LOIs [2022-11-23 14:05:29,171 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 52 for LOIs [2022-11-23 14:05:29,427 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:05:46,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55421#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~a12~0 4) (<= ~a~0 1) (<= 4 ~d~0) (= ~a9~0 18) (= 6 ~f~0) (<= 1 ~m_i~0) (= 3 ~c~0) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (<= ~m_i~0 1) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= 1 ~a~0) (= ~a27~0 1) (not (= (+ ~local~0 1) ~token~0)) (<= ~d~0 4) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-23 14:05:46,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:05:46,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:05:46,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 32 [2022-11-23 14:05:46,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521197955] [2022-11-23 14:05:46,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:46,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 14:05:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 14:05:46,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=5586, Unknown=0, NotChecked=0, Total=6162 [2022-11-23 14:05:46,628 INFO L87 Difference]: Start difference. First operand 2271 states and 4007 transitions. Second operand has 32 states, 20 states have (on average 6.65) internal successors, (133), 25 states have internal predecessors, (133), 13 states have call successors, (39), 9 states have call predecessors, (39), 17 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2022-11-23 14:05:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:52,701 INFO L93 Difference]: Finished difference Result 2836 states and 4687 transitions. [2022-11-23 14:05:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-23 14:05:52,701 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 20 states have (on average 6.65) internal successors, (133), 25 states have internal predecessors, (133), 13 states have call successors, (39), 9 states have call predecessors, (39), 17 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) Word has length 101 [2022-11-23 14:05:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:52,713 INFO L225 Difference]: With dead ends: 2836 [2022-11-23 14:05:52,713 INFO L226 Difference]: Without dead ends: 2495 [2022-11-23 14:05:52,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 248 SyntacticMatches, 11 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8529 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=2305, Invalid=18287, Unknown=0, NotChecked=0, Total=20592 [2022-11-23 14:05:52,721 INFO L413 NwaCegarLoop]: 3102 mSDtfsCounter, 31171 mSDsluCounter, 28048 mSDsCounter, 0 mSdLazyCounter, 4002 mSolverCounterSat, 1157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31177 SdHoareTripleChecker+Valid, 31150 SdHoareTripleChecker+Invalid, 5159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1157 IncrementalHoareTripleChecker+Valid, 4002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:52,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31177 Valid, 31150 Invalid, 5159 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1157 Valid, 4002 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 14:05:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2022-11-23 14:05:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2232. [2022-11-23 14:05:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2072 states have (on average 1.819015444015444) internal successors, (3769), 2076 states have internal predecessors, (3769), 88 states have call successors, (88), 70 states have call predecessors, (88), 70 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2022-11-23 14:05:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 3945 transitions. [2022-11-23 14:05:52,842 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 3945 transitions. Word has length 101 [2022-11-23 14:05:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:52,842 INFO L495 AbstractCegarLoop]: Abstraction has 2232 states and 3945 transitions. [2022-11-23 14:05:52,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 20 states have (on average 6.65) internal successors, (133), 25 states have internal predecessors, (133), 13 states have call successors, (39), 9 states have call predecessors, (39), 17 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2022-11-23 14:05:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 3945 transitions. [2022-11-23 14:05:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 14:05:52,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:52,846 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:52,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:53,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:05:53,053 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash 263533155, now seen corresponding path program 1 times [2022-11-23 14:05:53,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:53,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417276364] [2022-11-23 14:05:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:53,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:05:53,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417276364] [2022-11-23 14:05:53,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417276364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306864745] [2022-11-23 14:05:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:53,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:53,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:53,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:05:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:53,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:05:53,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:05:53,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-23 14:05:53,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306864745] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:53,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:05:53,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 14 [2022-11-23 14:05:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641429429] [2022-11-23 14:05:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:53,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:05:53,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:05:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:05:53,790 INFO L87 Difference]: Start difference. First operand 2232 states and 3945 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:05:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:54,541 INFO L93 Difference]: Finished difference Result 2828 states and 4633 transitions. [2022-11-23 14:05:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:05:54,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 102 [2022-11-23 14:05:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:54,550 INFO L225 Difference]: With dead ends: 2828 [2022-11-23 14:05:54,550 INFO L226 Difference]: Without dead ends: 2250 [2022-11-23 14:05:54,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:05:54,553 INFO L413 NwaCegarLoop]: 3149 mSDtfsCounter, 71 mSDsluCounter, 6212 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 9361 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:54,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 9361 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:05:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2022-11-23 14:05:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2221. [2022-11-23 14:05:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2049 states have (on average 1.820400195217179) internal successors, (3730), 2056 states have internal predecessors, (3730), 98 states have call successors, (98), 72 states have call predecessors, (98), 72 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-23 14:05:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 3926 transitions. [2022-11-23 14:05:54,674 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 3926 transitions. Word has length 102 [2022-11-23 14:05:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:54,675 INFO L495 AbstractCegarLoop]: Abstraction has 2221 states and 3926 transitions. [2022-11-23 14:05:54,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:05:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 3926 transitions. [2022-11-23 14:05:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-23 14:05:54,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:54,679 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:54,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:54,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:54,885 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1947252575, now seen corresponding path program 1 times [2022-11-23 14:05:54,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:54,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105788850] [2022-11-23 14:05:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:54,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 61 proven. 39 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-23 14:05:55,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:55,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105788850] [2022-11-23 14:05:55,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105788850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:55,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773625820] [2022-11-23 14:05:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:55,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:55,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:55,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:55,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:05:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:55,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:05:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 156 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:05:55,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 84 proven. 23 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-23 14:05:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773625820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196890600] [2022-11-23 14:05:55,774 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-23 14:05:55,774 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:05:55,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:05:55,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:05:55,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:06:11,767 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 152 for LOIs [2022-11-23 14:06:13,044 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 172 for LOIs [2022-11-23 14:06:14,037 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 156 for LOIs [2022-11-23 14:06:14,073 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 52 for LOIs [2022-11-23 14:06:14,079 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 134 for LOIs [2022-11-23 14:06:14,746 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 52 for LOIs [2022-11-23 14:06:14,997 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:06:33,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68908#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~a12~0 4) (<= ~a~0 1) (<= 4 ~d~0) (= ~a9~0 18) (= 6 ~f~0) (<= 1 ~m_i~0) (= 3 ~c~0) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (<= ~m_i~0 1) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= 1 ~a~0) (= ~a27~0 1) (not (= (+ ~local~0 1) ~token~0)) (<= ~d~0 4) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-23 14:06:33,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:06:33,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:06:33,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 13 [2022-11-23 14:06:33,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481137053] [2022-11-23 14:06:33,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:06:33,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:06:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:06:33,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=3428, Unknown=0, NotChecked=0, Total=3782 [2022-11-23 14:06:33,353 INFO L87 Difference]: Start difference. First operand 2221 states and 3926 transitions. Second operand has 13 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 4 states have call successors, (36), 5 states have call predecessors, (36), 7 states have return successors, (38), 5 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-23 14:06:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:34,840 INFO L93 Difference]: Finished difference Result 2359 states and 4076 transitions. [2022-11-23 14:06:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:06:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 4 states have call successors, (36), 5 states have call predecessors, (36), 7 states have return successors, (38), 5 states have call predecessors, (38), 4 states have call successors, (38) Word has length 155 [2022-11-23 14:06:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:34,847 INFO L225 Difference]: With dead ends: 2359 [2022-11-23 14:06:34,847 INFO L226 Difference]: Without dead ends: 1642 [2022-11-23 14:06:34,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 392 SyntacticMatches, 27 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3526 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=528, Invalid=5792, Unknown=0, NotChecked=0, Total=6320 [2022-11-23 14:06:34,852 INFO L413 NwaCegarLoop]: 3149 mSDtfsCounter, 13306 mSDsluCounter, 15653 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13316 SdHoareTripleChecker+Valid, 18802 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:34,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13316 Valid, 18802 Invalid, 1731 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [133 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:06:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-11-23 14:06:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2022-11-23 14:06:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.9914686166971358) internal successors, (3268), 1641 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 3268 transitions. [2022-11-23 14:06:34,891 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 3268 transitions. Word has length 155 [2022-11-23 14:06:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:34,892 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 3268 transitions. [2022-11-23 14:06:34,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 4 states have call successors, (36), 5 states have call predecessors, (36), 7 states have return successors, (38), 5 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-23 14:06:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 3268 transitions. [2022-11-23 14:06:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1633 [2022-11-23 14:06:34,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:34,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:35,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:35,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc89d243-c5ff-49ad-9256-ba8bf9862dc8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:35,202 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash 689104845, now seen corresponding path program 1 times [2022-11-23 14:06:35,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:35,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634466647] [2022-11-23 14:06:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:35,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:38,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634466647] [2022-11-23 14:06:38,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634466647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:38,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:38,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:38,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100178228] [2022-11-23 14:06:38,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:38,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:38,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:38,206 INFO L87 Difference]: Start difference. First operand 1642 states and 3268 transitions. Second operand has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:45,688 INFO L93 Difference]: Finished difference Result 4920 states and 9799 transitions. [2022-11-23 14:06:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:45,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1632 [2022-11-23 14:06:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:45,701 INFO L225 Difference]: With dead ends: 4920 [2022-11-23 14:06:45,701 INFO L226 Difference]: Without dead ends: 3280 [2022-11-23 14:06:45,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:45,706 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 53 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5637 mSolverCounterSat, 1602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 7239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1602 IncrementalHoareTripleChecker+Valid, 5637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:45,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 102 Invalid, 7239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1602 Valid, 5637 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-23 14:06:45,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2022-11-23 14:06:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2022-11-23 14:06:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3279 states have (on average 1.9646233607807257) internal successors, (6442), 3279 states have internal predecessors, (6442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 6442 transitions. [2022-11-23 14:06:45,784 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 6442 transitions. Word has length 1632 [2022-11-23 14:06:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:45,787 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 6442 transitions. [2022-11-23 14:06:45,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 6442 transitions. [2022-11-23 14:06:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1639 [2022-11-23 14:06:45,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:45,902 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:45,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:06:45,902 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1883500484, now seen corresponding path program 1 times [2022-11-23 14:06:45,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:45,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079197897] [2022-11-23 14:06:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:45,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:47,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079197897] [2022-11-23 14:06:47,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079197897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:47,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:47,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:47,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397551672] [2022-11-23 14:06:47,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:47,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:47,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:47,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:47,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:47,657 INFO L87 Difference]: Start difference. First operand 3280 states and 6442 transitions. Second operand has 3 states, 3 states have (on average 546.0) internal successors, (1638), 2 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:54,957 INFO L93 Difference]: Finished difference Result 9834 states and 19321 transitions. [2022-11-23 14:06:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.0) internal successors, (1638), 2 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1638 [2022-11-23 14:06:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:54,975 INFO L225 Difference]: With dead ends: 9834 [2022-11-23 14:06:54,975 INFO L226 Difference]: Without dead ends: 6556 [2022-11-23 14:06:54,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:54,981 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 1683 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4908 mSolverCounterSat, 2225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 7133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2225 IncrementalHoareTripleChecker+Valid, 4908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:54,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1683 Valid, 621 Invalid, 7133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2225 Valid, 4908 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-23 14:06:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-23 14:06:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6556. [2022-11-23 14:06:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6556 states, 6555 states have (on average 1.756369183829138) internal successors, (11513), 6555 states have internal predecessors, (11513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 11513 transitions. [2022-11-23 14:06:55,113 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 11513 transitions. Word has length 1638 [2022-11-23 14:06:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:55,114 INFO L495 AbstractCegarLoop]: Abstraction has 6556 states and 11513 transitions. [2022-11-23 14:06:55,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.0) internal successors, (1638), 2 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:55,115 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 11513 transitions. [2022-11-23 14:06:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1640 [2022-11-23 14:06:55,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:55,146 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:55,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:06:55,147 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:55,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1695257273, now seen corresponding path program 1 times [2022-11-23 14:06:55,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:55,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488096408] [2022-11-23 14:06:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:55,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:58,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:58,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488096408] [2022-11-23 14:06:58,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488096408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:58,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:58,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:58,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795655714] [2022-11-23 14:06:58,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:58,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:58,735 INFO L87 Difference]: Start difference. First operand 6556 states and 11513 transitions. Second operand has 4 states, 4 states have (on average 409.75) internal successors, (1639), 3 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:10,557 INFO L93 Difference]: Finished difference Result 19660 states and 33847 transitions. [2022-11-23 14:07:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:07:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 409.75) internal successors, (1639), 3 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1639 [2022-11-23 14:07:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:10,582 INFO L225 Difference]: With dead ends: 19660 [2022-11-23 14:07:10,582 INFO L226 Difference]: Without dead ends: 11470 [2022-11-23 14:07:10,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:07:10,591 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 2163 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8876 mSolverCounterSat, 3340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2163 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 12216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3340 IncrementalHoareTripleChecker+Valid, 8876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:10,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2163 Valid, 348 Invalid, 12216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3340 Valid, 8876 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-11-23 14:07:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11470 states. [2022-11-23 14:07:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11470 to 11470. [2022-11-23 14:07:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11470 states, 11469 states have (on average 1.3162437876013602) internal successors, (15096), 11469 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11470 states to 11470 states and 15096 transitions. [2022-11-23 14:07:10,783 INFO L78 Accepts]: Start accepts. Automaton has 11470 states and 15096 transitions. Word has length 1639 [2022-11-23 14:07:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:10,784 INFO L495 AbstractCegarLoop]: Abstraction has 11470 states and 15096 transitions. [2022-11-23 14:07:10,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 409.75) internal successors, (1639), 3 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 11470 states and 15096 transitions. [2022-11-23 14:07:10,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1651 [2022-11-23 14:07:10,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:10,824 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:10,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:07:10,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1899895679, now seen corresponding path program 1 times [2022-11-23 14:07:10,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:10,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763503898] [2022-11-23 14:07:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:12,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:12,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763503898] [2022-11-23 14:07:12,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763503898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:12,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:12,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:07:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365119390] [2022-11-23 14:07:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:12,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:12,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:12,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:12,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:12,618 INFO L87 Difference]: Start difference. First operand 11470 states and 15096 transitions. Second operand has 3 states, 3 states have (on average 550.0) internal successors, (1650), 3 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:18,462 INFO L93 Difference]: Finished difference Result 32766 states and 43098 transitions. [2022-11-23 14:07:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:18,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 550.0) internal successors, (1650), 3 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1650 [2022-11-23 14:07:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:18,506 INFO L225 Difference]: With dead ends: 32766 [2022-11-23 14:07:18,506 INFO L226 Difference]: Without dead ends: 21298 [2022-11-23 14:07:18,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:18,521 INFO L413 NwaCegarLoop]: 2232 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4393 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 5446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 4393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:18,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2244 Invalid, 5446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 4393 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-23 14:07:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21298 states. [2022-11-23 14:07:18,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21298 to 21298. [2022-11-23 14:07:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21298 states, 21297 states have (on average 1.215664178053247) internal successors, (25890), 21297 states have internal predecessors, (25890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21298 states to 21298 states and 25890 transitions. [2022-11-23 14:07:18,852 INFO L78 Accepts]: Start accepts. Automaton has 21298 states and 25890 transitions. Word has length 1650 [2022-11-23 14:07:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:18,853 INFO L495 AbstractCegarLoop]: Abstraction has 21298 states and 25890 transitions. [2022-11-23 14:07:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 550.0) internal successors, (1650), 3 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 21298 states and 25890 transitions. [2022-11-23 14:07:18,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1652 [2022-11-23 14:07:18,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:18,909 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:18,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 14:07:18,910 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:18,911 INFO L85 PathProgramCache]: Analyzing trace with hash -724997372, now seen corresponding path program 1 times [2022-11-23 14:07:18,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:18,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942698469] [2022-11-23 14:07:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:18,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:07:20,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:20,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942698469] [2022-11-23 14:07:20,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942698469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:20,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:20,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:07:20,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820216354] [2022-11-23 14:07:20,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:20,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:20,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:20,379 INFO L87 Difference]: Start difference. First operand 21298 states and 25890 transitions. Second operand has 3 states, 3 states have (on average 547.0) internal successors, (1641), 2 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:26,571 INFO L93 Difference]: Finished difference Result 55698 states and 67782 transitions. [2022-11-23 14:07:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:26,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 547.0) internal successors, (1641), 2 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1651 [2022-11-23 14:07:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:26,629 INFO L225 Difference]: With dead ends: 55698 [2022-11-23 14:07:26,629 INFO L226 Difference]: Without dead ends: 34402 [2022-11-23 14:07:26,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:26,647 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 1936 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4426 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 5278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 4426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:26,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1936 Valid, 391 Invalid, 5278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 4426 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-23 14:07:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34402 states. [2022-11-23 14:07:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34402 to 34402. [2022-11-23 14:07:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34402 states, 34401 states have (on average 1.140083137118107) internal successors, (39220), 34401 states have internal predecessors, (39220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34402 states to 34402 states and 39220 transitions. [2022-11-23 14:07:27,133 INFO L78 Accepts]: Start accepts. Automaton has 34402 states and 39220 transitions. Word has length 1651 [2022-11-23 14:07:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:27,133 INFO L495 AbstractCegarLoop]: Abstraction has 34402 states and 39220 transitions. [2022-11-23 14:07:27,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 547.0) internal successors, (1641), 2 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 34402 states and 39220 transitions. [2022-11-23 14:07:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1714 [2022-11-23 14:07:27,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:27,201 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:27,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:07:27,202 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1239745691, now seen corresponding path program 1 times [2022-11-23 14:07:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:27,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804276140] [2022-11-23 14:07:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:27,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:07:28,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:28,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804276140] [2022-11-23 14:07:28,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804276140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:28,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:28,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:07:28,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499673582] [2022-11-23 14:07:28,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:28,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:28,434 INFO L87 Difference]: Start difference. First operand 34402 states and 39220 transitions. Second operand has 3 states, 3 states have (on average 567.6666666666666) internal successors, (1703), 2 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:34,567 INFO L93 Difference]: Finished difference Result 99924 states and 113748 transitions. [2022-11-23 14:07:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:34,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 567.6666666666666) internal successors, (1703), 2 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1713 [2022-11-23 14:07:34,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:34,863 INFO L225 Difference]: With dead ends: 99924 [2022-11-23 14:07:34,863 INFO L226 Difference]: Without dead ends: 65524 [2022-11-23 14:07:34,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:34,887 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 1905 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4137 mSolverCounterSat, 1197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1905 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 5334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1197 IncrementalHoareTripleChecker+Valid, 4137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:34,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1905 Valid, 456 Invalid, 5334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1197 Valid, 4137 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-23 14:07:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65524 states. [2022-11-23 14:07:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65524 to 62248. [2022-11-23 14:07:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62248 states, 62247 states have (on average 1.1083425707263002) internal successors, (68991), 62247 states have internal predecessors, (68991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62248 states to 62248 states and 68991 transitions. [2022-11-23 14:07:35,830 INFO L78 Accepts]: Start accepts. Automaton has 62248 states and 68991 transitions. Word has length 1713 [2022-11-23 14:07:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:35,831 INFO L495 AbstractCegarLoop]: Abstraction has 62248 states and 68991 transitions. [2022-11-23 14:07:35,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 567.6666666666666) internal successors, (1703), 2 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 62248 states and 68991 transitions. [2022-11-23 14:07:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1735 [2022-11-23 14:07:35,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:35,915 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:35,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:07:35,915 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:35,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1514571096, now seen corresponding path program 1 times [2022-11-23 14:07:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:35,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780639922] [2022-11-23 14:07:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:35,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-23 14:07:37,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:37,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780639922] [2022-11-23 14:07:37,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780639922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:37,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:37,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:07:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857704963] [2022-11-23 14:07:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:37,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:37,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:37,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:37,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:37,035 INFO L87 Difference]: Start difference. First operand 62248 states and 68991 transitions. Second operand has 3 states, 3 states have (on average 556.6666666666666) internal successors, (1670), 2 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:43,979 INFO L93 Difference]: Finished difference Result 178548 states and 197224 transitions. [2022-11-23 14:07:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:43,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.6666666666666) internal successors, (1670), 2 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1734 [2022-11-23 14:07:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:44,147 INFO L225 Difference]: With dead ends: 178548 [2022-11-23 14:07:44,147 INFO L226 Difference]: Without dead ends: 116302 [2022-11-23 14:07:44,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:44,198 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 1658 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4471 mSolverCounterSat, 1135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 5606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1135 IncrementalHoareTripleChecker+Valid, 4471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:44,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1658 Valid, 477 Invalid, 5606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1135 Valid, 4471 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-23 14:07:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116302 states. [2022-11-23 14:07:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116302 to 109750. [2022-11-23 14:07:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109750 states, 109749 states have (on average 1.0877456742202662) internal successors, (119379), 109749 states have internal predecessors, (119379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109750 states to 109750 states and 119379 transitions. [2022-11-23 14:07:46,403 INFO L78 Accepts]: Start accepts. Automaton has 109750 states and 119379 transitions. Word has length 1734 [2022-11-23 14:07:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:46,404 INFO L495 AbstractCegarLoop]: Abstraction has 109750 states and 119379 transitions. [2022-11-23 14:07:46,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.6666666666666) internal successors, (1670), 2 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 109750 states and 119379 transitions. [2022-11-23 14:07:46,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2006 [2022-11-23 14:07:46,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:46,555 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:46,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 14:07:46,556 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:46,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash -956577030, now seen corresponding path program 1 times [2022-11-23 14:07:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:46,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452985132] [2022-11-23 14:07:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 515 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:07:48,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:48,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452985132] [2022-11-23 14:07:48,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452985132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:48,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:48,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:07:48,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194382834] [2022-11-23 14:07:48,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:48,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:48,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:48,061 INFO L87 Difference]: Start difference. First operand 109750 states and 119379 transitions. Second operand has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:55,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:55,312 INFO L93 Difference]: Finished difference Result 263724 states and 287923 transitions. [2022-11-23 14:07:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2005 [2022-11-23 14:07:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:55,496 INFO L225 Difference]: With dead ends: 263724 [2022-11-23 14:07:55,496 INFO L226 Difference]: Without dead ends: 153976 [2022-11-23 14:07:55,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:55,756 INFO L413 NwaCegarLoop]: 2055 mSDtfsCounter, 1545 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4322 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 5554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 4322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:55,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 2066 Invalid, 5554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1232 Valid, 4322 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 14:07:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153976 states. [2022-11-23 14:07:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153976 to 149062. [2022-11-23 14:07:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149062 states, 149061 states have (on average 1.0804368681278134) internal successors, (161051), 149061 states have internal predecessors, (161051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149062 states to 149062 states and 161051 transitions. [2022-11-23 14:07:58,120 INFO L78 Accepts]: Start accepts. Automaton has 149062 states and 161051 transitions. Word has length 2005 [2022-11-23 14:07:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:58,121 INFO L495 AbstractCegarLoop]: Abstraction has 149062 states and 161051 transitions. [2022-11-23 14:07:58,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 149062 states and 161051 transitions. [2022-11-23 14:07:58,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2012 [2022-11-23 14:07:58,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:58,564 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:58,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 14:07:58,564 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash -716221520, now seen corresponding path program 1 times [2022-11-23 14:07:58,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:58,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624000058] [2022-11-23 14:07:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:58,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-11-23 14:08:01,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:01,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624000058] [2022-11-23 14:08:01,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624000058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:01,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:01,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:08:01,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310470029] [2022-11-23 14:08:01,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:01,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:08:01,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:08:01,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:08:01,208 INFO L87 Difference]: Start difference. First operand 149062 states and 161051 transitions. Second operand has 3 states, 3 states have (on average 623.0) internal successors, (1869), 3 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:08,506 INFO L93 Difference]: Finished difference Result 303036 states and 327573 transitions. [2022-11-23 14:08:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:08:08,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 623.0) internal successors, (1869), 3 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2011 [2022-11-23 14:08:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:08,693 INFO L225 Difference]: With dead ends: 303036 [2022-11-23 14:08:08,694 INFO L226 Difference]: Without dead ends: 153976 [2022-11-23 14:08:08,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:08:08,744 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 94 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4491 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 5339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 4491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:08,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 520 Invalid, 5339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 4491 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-23 14:08:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153976 states. [2022-11-23 14:08:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153976 to 152338. [2022-11-23 14:08:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152338 states, 152337 states have (on average 1.0629065821172794) internal successors, (161920), 152337 states have internal predecessors, (161920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152338 states to 152338 states and 161920 transitions. [2022-11-23 14:08:11,000 INFO L78 Accepts]: Start accepts. Automaton has 152338 states and 161920 transitions. Word has length 2011 [2022-11-23 14:08:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:11,002 INFO L495 AbstractCegarLoop]: Abstraction has 152338 states and 161920 transitions. [2022-11-23 14:08:11,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 623.0) internal successors, (1869), 3 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 152338 states and 161920 transitions. [2022-11-23 14:08:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2135 [2022-11-23 14:08:11,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:11,197 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:11,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 14:08:11,198 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:11,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1752672220, now seen corresponding path program 1 times [2022-11-23 14:08:11,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:11,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747847581] [2022-11-23 14:08:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:11,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-11-23 14:08:13,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:13,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747847581] [2022-11-23 14:08:13,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747847581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:13,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:13,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:08:13,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499738264] [2022-11-23 14:08:13,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:13,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:08:13,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:13,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:08:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:08:13,448 INFO L87 Difference]: Start difference. First operand 152338 states and 161920 transitions. Second operand has 3 states, 3 states have (on average 635.6666666666666) internal successors, (1907), 3 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:20,395 INFO L93 Difference]: Finished difference Result 311226 states and 330458 transitions. [2022-11-23 14:08:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:08:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 635.6666666666666) internal successors, (1907), 3 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2134 [2022-11-23 14:08:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:20,852 INFO L225 Difference]: With dead ends: 311226 [2022-11-23 14:08:20,853 INFO L226 Difference]: Without dead ends: 158890 [2022-11-23 14:08:20,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:08:20,907 INFO L413 NwaCegarLoop]: 2342 mSDtfsCounter, 1396 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4843 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 5230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 4843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:20,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 2353 Invalid, 5230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 4843 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-23 14:08:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158890 states. [2022-11-23 14:08:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158890 to 157252. [2022-11-23 14:08:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157252 states, 157251 states have (on average 1.0572079032883734) internal successors, (166247), 157251 states have internal predecessors, (166247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157252 states to 157252 states and 166247 transitions. [2022-11-23 14:08:23,283 INFO L78 Accepts]: Start accepts. Automaton has 157252 states and 166247 transitions. Word has length 2134 [2022-11-23 14:08:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:23,283 INFO L495 AbstractCegarLoop]: Abstraction has 157252 states and 166247 transitions. [2022-11-23 14:08:23,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 635.6666666666666) internal successors, (1907), 3 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 157252 states and 166247 transitions. [2022-11-23 14:08:23,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2141 [2022-11-23 14:08:23,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:23,422 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:23,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 14:08:23,422 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:23,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1250168968, now seen corresponding path program 1 times [2022-11-23 14:08:23,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:23,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113177357] [2022-11-23 14:08:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:23,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 702 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-11-23 14:08:25,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:25,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113177357] [2022-11-23 14:08:25,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113177357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:25,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:25,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:08:25,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721762808] [2022-11-23 14:08:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:08:25,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:08:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:08:25,581 INFO L87 Difference]: Start difference. First operand 157252 states and 166247 transitions. Second operand has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:33,095 INFO L93 Difference]: Finished difference Result 321054 states and 339934 transitions. [2022-11-23 14:08:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:08:33,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2140 [2022-11-23 14:08:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:33,386 INFO L225 Difference]: With dead ends: 321054 [2022-11-23 14:08:33,386 INFO L226 Difference]: Without dead ends: 163804 [2022-11-23 14:08:33,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:08:33,440 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1644 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4504 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 4504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:33,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 351 Invalid, 5462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [958 Valid, 4504 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-23 14:08:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163804 states. [2022-11-23 14:08:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163804 to 162166. [2022-11-23 14:08:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162166 states, 162165 states have (on average 1.0524650818610675) internal successors, (170673), 162165 states have internal predecessors, (170673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162166 states to 162166 states and 170673 transitions. [2022-11-23 14:08:35,654 INFO L78 Accepts]: Start accepts. Automaton has 162166 states and 170673 transitions. Word has length 2140 [2022-11-23 14:08:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:35,654 INFO L495 AbstractCegarLoop]: Abstraction has 162166 states and 170673 transitions. [2022-11-23 14:08:35,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 162166 states and 170673 transitions. [2022-11-23 14:08:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2144 [2022-11-23 14:08:35,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:35,786 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:35,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-23 14:08:35,787 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:35,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1386132793, now seen corresponding path program 1 times [2022-11-23 14:08:35,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:35,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746517296] [2022-11-23 14:08:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:35,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 891 proven. 0 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-23 14:08:39,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746517296] [2022-11-23 14:08:39,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746517296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:39,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:39,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:08:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909275291] [2022-11-23 14:08:39,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:39,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:08:39,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:08:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:08:39,202 INFO L87 Difference]: Start difference. First operand 162166 states and 170673 transitions. Second operand has 3 states, 3 states have (on average 617.0) internal successors, (1851), 3 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:46,079 INFO L93 Difference]: Finished difference Result 353814 states and 372641 transitions. [2022-11-23 14:08:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:08:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 617.0) internal successors, (1851), 3 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2143 [2022-11-23 14:08:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:46,615 INFO L225 Difference]: With dead ends: 353814 [2022-11-23 14:08:46,615 INFO L226 Difference]: Without dead ends: 191650 [2022-11-23 14:08:46,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:08:46,664 INFO L413 NwaCegarLoop]: 2246 mSDtfsCounter, 1536 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4664 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 5242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 4664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:46,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1536 Valid, 2257 Invalid, 5242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 4664 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-23 14:08:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191650 states.