./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/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_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/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_9918a3e6-50c3-4a30-9b04-71ad884027b7/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 2f6e67caa8159a722902bebe9d23adade07462f3fac0eb20b485945b97ba6592 --- 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 14:41:09,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:41:09,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:41:09,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:41:09,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:41:09,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:41:09,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:41:09,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:41:09,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:41:09,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:41:09,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:41:09,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:41:09,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:41:09,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:41:09,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:41:09,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:41:09,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:41:09,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:41:09,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:41:09,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:41:09,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:41:09,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:41:09,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:41:09,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:41:09,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:41:09,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:41:09,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:41:09,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:41:09,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:41:09,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:41:09,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:41:09,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:41:09,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:41:09,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:41:09,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:41:09,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:41:09,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:41:09,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:41:09,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:41:09,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:41:09,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:41:09,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:41:09,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:41:09,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:41:09,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:41:09,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:41:09,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:41:09,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:41:09,251 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:41:09,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:41:09,252 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:41:09,252 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:41:09,254 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:41:09,254 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:41:09,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:41:09,255 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:41:09,255 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:41:09,255 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:41:09,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:41:09,256 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:41:09,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:41:09,257 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:41:09,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:41:09,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:41:09,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:41:09,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:41:09,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:41:09,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:41:09,259 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:41:09,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:41:09,260 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:41:09,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:41:09,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:41:09,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:41:09,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:41:09,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:41:09,262 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:41:09,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:41:09,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:41:09,262 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:41:09,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:41:09,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:41:09,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:41:09,264 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_9918a3e6-50c3-4a30-9b04-71ad884027b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f6e67caa8159a722902bebe9d23adade07462f3fac0eb20b485945b97ba6592 [2022-11-23 14:41:09,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:41:09,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:41:09,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:41:09,679 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:41:09,683 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:41:09,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c [2022-11-23 14:41:13,280 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:41:14,192 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:41:14,193 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c [2022-11-23 14:41:14,255 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/data/e0cb1c4f6/6c80b31107df46429bdff8c0b1c8aa60/FLAGee88211fa [2022-11-23 14:41:14,277 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/data/e0cb1c4f6/6c80b31107df46429bdff8c0b1c8aa60 [2022-11-23 14:41:14,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:41:14,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:41:14,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:41:14,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:41:14,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:41:14,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:14" (1/1) ... [2022-11-23 14:41:14,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b8330ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:14, skipping insertion in model container [2022-11-23 14:41:14,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:14" (1/1) ... [2022-11-23 14:41:14,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:41:14,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:41:17,416 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_9918a3e6-50c3-4a30-9b04-71ad884027b7/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c[377069,377082] [2022-11-23 14:41:17,460 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_9918a3e6-50c3-4a30-9b04-71ad884027b7/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c[383339,383352] [2022-11-23 14:41:17,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:41:17,706 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:41:19,210 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_9918a3e6-50c3-4a30-9b04-71ad884027b7/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c[377069,377082] [2022-11-23 14:41:19,222 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_9918a3e6-50c3-4a30-9b04-71ad884027b7/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c[383339,383352] [2022-11-23 14:41:19,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:41:19,329 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:41:19,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19 WrapperNode [2022-11-23 14:41:19,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:41:19,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:41:19,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:41:19,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:41:19,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:19,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:19,917 INFO L138 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2022-11-23 14:41:19,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:41:19,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:41:19,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:41:19,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:41:19,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:19,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:20,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:20,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:20,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:20,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:20,728 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:20,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:20,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:41:20,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:41:20,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:41:20,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:41:20,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (1/1) ... [2022-11-23 14:41:20,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:41:20,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:20,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:41:20,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:41:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:41:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-23 14:41:20,958 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-23 14:41:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 14:41:20,958 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 14:41:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-23 14:41:20,959 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-23 14:41:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-23 14:41:20,959 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-23 14:41:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-23 14:41:20,960 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-23 14:41:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-23 14:41:20,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-23 14:41:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:41:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:41:20,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:41:21,131 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:41:21,134 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:41:32,791 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:41:35,295 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:41:35,296 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-23 14:41:35,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:41:35 BoogieIcfgContainer [2022-11-23 14:41:35,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:41:35,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:41:35,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:41:35,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:41:35,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:41:14" (1/3) ... [2022-11-23 14:41:35,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec196cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:41:35, skipping insertion in model container [2022-11-23 14:41:35,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:19" (2/3) ... [2022-11-23 14:41:35,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec196cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:41:35, skipping insertion in model container [2022-11-23 14:41:35,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:41:35" (3/3) ... [2022-11-23 14:41:35,314 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.03.cil-2.c [2022-11-23 14:41:35,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:41:35,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 14:41:35,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:41:35,471 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;@4d1dd96c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:41:35,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 14:41:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 1732 states, 1706 states have (on average 1.9747948417350527) internal successors, (3369), 1709 states have internal predecessors, (3369), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-23 14:41:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 14:41:35,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:35,503 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] [2022-11-23 14:41:35,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1781392638, now seen corresponding path program 1 times [2022-11-23 14:41:35,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723541904] [2022-11-23 14:41:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:36,120 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 14:41:36,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:36,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723541904] [2022-11-23 14:41:36,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723541904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:36,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:36,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:41:36,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97663785] [2022-11-23 14:41:36,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:36,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:41:36,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:36,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:41:36,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:41:36,205 INFO L87 Difference]: Start difference. First operand has 1732 states, 1706 states have (on average 1.9747948417350527) internal successors, (3369), 1709 states have internal predecessors, (3369), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 14:41:37,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:37,482 INFO L93 Difference]: Finished difference Result 3536 states and 6923 transitions. [2022-11-23 14:41:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:41:37,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 40 [2022-11-23 14:41:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:37,515 INFO L225 Difference]: With dead ends: 3536 [2022-11-23 14:41:37,516 INFO L226 Difference]: Without dead ends: 1803 [2022-11-23 14:41:37,526 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 14:41:37,530 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 3482 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 6420 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:37,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 6420 Invalid, 596 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:41:37,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-11-23 14:41:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1802. [2022-11-23 14:41:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1758 states have (on average 1.9522184300341296) internal successors, (3432), 1761 states have internal predecessors, (3432), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-23 14:41:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 3492 transitions. [2022-11-23 14:41:37,698 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 3492 transitions. Word has length 40 [2022-11-23 14:41:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:37,698 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 3492 transitions. [2022-11-23 14:41:37,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 14:41:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 3492 transitions. [2022-11-23 14:41:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:41:37,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:37,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 14:41:37,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:41:37,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:37,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1848839034, now seen corresponding path program 1 times [2022-11-23 14:41:37,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:37,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995283483] [2022-11-23 14:41:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:37,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:41:37,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:37,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995283483] [2022-11-23 14:41:37,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995283483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:37,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478539511] [2022-11-23 14:41:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:37,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:37,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:37,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:38,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:41:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:41:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:41:38,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:38,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478539511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:38,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:41:38,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:41:38,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527615909] [2022-11-23 14:41:38,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:38,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:38,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:38,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:38,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:41:38,354 INFO L87 Difference]: Start difference. First operand 1802 states and 3492 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:41:38,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:38,955 INFO L93 Difference]: Finished difference Result 2107 states and 3925 transitions. [2022-11-23 14:41:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:38,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-23 14:41:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:38,975 INFO L225 Difference]: With dead ends: 2107 [2022-11-23 14:41:38,975 INFO L226 Difference]: Without dead ends: 1951 [2022-11-23 14:41:38,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:41:38,980 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3363 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3363 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:38,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3363 Valid, 3280 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:41:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-23 14:41:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1947. [2022-11-23 14:41:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1867 states have (on average 1.9180503481521156) internal successors, (3581), 1871 states have internal predecessors, (3581), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-23 14:41:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 3689 transitions. [2022-11-23 14:41:39,079 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 3689 transitions. Word has length 73 [2022-11-23 14:41:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:39,080 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 3689 transitions. [2022-11-23 14:41:39,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:41:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 3689 transitions. [2022-11-23 14:41:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:41:39,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:39,093 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 14:41:39,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:39,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:39,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1342636600, now seen corresponding path program 1 times [2022-11-23 14:41:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:39,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731036602] [2022-11-23 14:41:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:39,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:41:39,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:39,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731036602] [2022-11-23 14:41:39,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731036602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:39,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284730665] [2022-11-23 14:41:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:39,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:39,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:39,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:41:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:39,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:41:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:41:39,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:39,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284730665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:39,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:41:39,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:41:39,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827120617] [2022-11-23 14:41:39,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:39,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:39,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:39,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:41:39,664 INFO L87 Difference]: Start difference. First operand 1947 states and 3689 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:41:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:40,456 INFO L93 Difference]: Finished difference Result 2536 states and 4516 transitions. [2022-11-23 14:41:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-23 14:41:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:40,474 INFO L225 Difference]: With dead ends: 2536 [2022-11-23 14:41:40,474 INFO L226 Difference]: Without dead ends: 2235 [2022-11-23 14:41:40,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:41:40,481 INFO L413 NwaCegarLoop]: 3166 mSDtfsCounter, 3366 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 3256 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:40,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3366 Valid, 3256 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:41:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-11-23 14:41:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2229. [2022-11-23 14:41:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2079 states have (on average 1.86002886002886) internal successors, (3867), 2085 states have internal predecessors, (3867), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-23 14:41:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 4067 transitions. [2022-11-23 14:41:40,623 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 4067 transitions. Word has length 73 [2022-11-23 14:41:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:40,623 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 4067 transitions. [2022-11-23 14:41:40,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:41:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 4067 transitions. [2022-11-23 14:41:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:41:40,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:40,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 14:41:40,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:40,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:40,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash -696101562, now seen corresponding path program 1 times [2022-11-23 14:41:40,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:40,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190305432] [2022-11-23 14:41:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:40,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:41:41,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:41,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190305432] [2022-11-23 14:41:41,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190305432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:41,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:41,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:41:41,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925812555] [2022-11-23 14:41:41,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:41,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:41:41,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:41:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:41:41,530 INFO L87 Difference]: Start difference. First operand 2229 states and 4067 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 14:41:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:42,949 INFO L93 Difference]: Finished difference Result 3505 states and 5806 transitions. [2022-11-23 14:41:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:41:42,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 73 [2022-11-23 14:41:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:42,977 INFO L225 Difference]: With dead ends: 3505 [2022-11-23 14:41:42,978 INFO L226 Difference]: Without dead ends: 2923 [2022-11-23 14:41:42,983 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 14:41:42,986 INFO L413 NwaCegarLoop]: 3173 mSDtfsCounter, 3590 mSDsluCounter, 9386 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3602 SdHoareTripleChecker+Valid, 12559 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:42,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3602 Valid, 12559 Invalid, 1146 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [87 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:41:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2022-11-23 14:41:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2761. [2022-11-23 14:41:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2475 states have (on average 1.7741414141414142) internal successors, (4391), 2485 states have internal predecessors, (4391), 188 states have call successors, (188), 96 states have call predecessors, (188), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-23 14:41:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 4767 transitions. [2022-11-23 14:41:43,222 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 4767 transitions. Word has length 73 [2022-11-23 14:41:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:43,223 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 4767 transitions. [2022-11-23 14:41:43,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 14:41:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 4767 transitions. [2022-11-23 14:41:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:41:43,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:43,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:43,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:41:43,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash 521254283, now seen corresponding path program 1 times [2022-11-23 14:41:43,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:43,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576705845] [2022-11-23 14:41:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:41:43,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:43,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576705845] [2022-11-23 14:41:43,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576705845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:43,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:43,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:41:43,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696756267] [2022-11-23 14:41:43,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:43,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:43,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:43,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:43,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:41:43,378 INFO L87 Difference]: Start difference. First operand 2761 states and 4767 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 14:41:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:44,217 INFO L93 Difference]: Finished difference Result 3622 states and 5946 transitions. [2022-11-23 14:41:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 74 [2022-11-23 14:41:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:44,240 INFO L225 Difference]: With dead ends: 3622 [2022-11-23 14:41:44,240 INFO L226 Difference]: Without dead ends: 3044 [2022-11-23 14:41:44,244 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 14:41:44,247 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 45 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6362 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:44,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6362 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:41:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-11-23 14:41:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2913. [2022-11-23 14:41:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2611 states have (on average 1.7644580620451935) internal successors, (4607), 2621 states have internal predecessors, (4607), 196 states have call successors, (196), 104 states have call predecessors, (196), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2022-11-23 14:41:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 4999 transitions. [2022-11-23 14:41:44,574 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 4999 transitions. Word has length 74 [2022-11-23 14:41:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:44,575 INFO L495 AbstractCegarLoop]: Abstraction has 2913 states and 4999 transitions. [2022-11-23 14:41:44,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 14:41:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 4999 transitions. [2022-11-23 14:41:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 14:41:44,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:44,584 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, 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 14:41:44,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:41:44,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:44,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:44,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1195856980, now seen corresponding path program 1 times [2022-11-23 14:41:44,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:44,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405841296] [2022-11-23 14:41:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:44,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:41:44,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405841296] [2022-11-23 14:41:44,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405841296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:44,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:44,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:41:44,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10593424] [2022-11-23 14:41:44,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:44,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:44,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:41:44,697 INFO L87 Difference]: Start difference. First operand 2913 states and 4999 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 14:41:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:45,361 INFO L93 Difference]: Finished difference Result 4810 states and 7608 transitions. [2022-11-23 14:41:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:45,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 96 [2022-11-23 14:41:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:45,382 INFO L225 Difference]: With dead ends: 4810 [2022-11-23 14:41:45,382 INFO L226 Difference]: Without dead ends: 3543 [2022-11-23 14:41:45,388 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 14:41:45,389 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3359 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:45,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3359 Valid, 3280 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:41:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2022-11-23 14:41:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 3529. [2022-11-23 14:41:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3083 states have (on average 1.6980214077197535) internal successors, (5235), 3097 states have internal predecessors, (5235), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-11-23 14:41:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 5811 transitions. [2022-11-23 14:41:45,599 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 5811 transitions. Word has length 96 [2022-11-23 14:41:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:45,600 INFO L495 AbstractCegarLoop]: Abstraction has 3529 states and 5811 transitions. [2022-11-23 14:41:45,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 14:41:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 5811 transitions. [2022-11-23 14:41:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:41:45,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:45,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:45,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:41:45,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1026546287, now seen corresponding path program 1 times [2022-11-23 14:41:45,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:45,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650217904] [2022-11-23 14:41:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:45,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-23 14:41:45,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:45,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650217904] [2022-11-23 14:41:45,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650217904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:45,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996780647] [2022-11-23 14:41:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:45,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:45,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:45,759 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:45,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:41:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:45,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:41:45,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:41:46,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:46,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996780647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:46,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:41:46,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 14:41:46,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794844966] [2022-11-23 14:41:46,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:46,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:46,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:46,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:46,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:41:46,015 INFO L87 Difference]: Start difference. First operand 3529 states and 5811 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 14:41:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:46,775 INFO L93 Difference]: Finished difference Result 5197 states and 8113 transitions. [2022-11-23 14:41:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:46,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 109 [2022-11-23 14:41:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:46,798 INFO L225 Difference]: With dead ends: 5197 [2022-11-23 14:41:46,798 INFO L226 Difference]: Without dead ends: 3931 [2022-11-23 14:41:46,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 14:41:46,811 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 53 mSDsluCounter, 3160 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:46,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 6364 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:41:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2022-11-23 14:41:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3741. [2022-11-23 14:41:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3271 states have (on average 1.6921430755120759) internal successors, (5535), 3285 states have internal predecessors, (5535), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-23 14:41:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 6135 transitions. [2022-11-23 14:41:47,048 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 6135 transitions. Word has length 109 [2022-11-23 14:41:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:47,049 INFO L495 AbstractCegarLoop]: Abstraction has 3741 states and 6135 transitions. [2022-11-23 14:41:47,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 14:41:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 6135 transitions. [2022-11-23 14:41:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:41:47,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:47,059 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:47,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:47,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:47,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:47,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:47,267 INFO L85 PathProgramCache]: Analyzing trace with hash 215914077, now seen corresponding path program 2 times [2022-11-23 14:41:47,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:47,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689152680] [2022-11-23 14:41:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:47,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:41:47,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689152680] [2022-11-23 14:41:47,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689152680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:47,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392344888] [2022-11-23 14:41:47,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:41:47,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:47,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:47,751 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:47,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:41:47,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:41:47,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:41:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:41:47,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:41:47,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:47,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392344888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:47,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:41:47,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:41:47,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546699583] [2022-11-23 14:41:47,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:47,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:47,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:47,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:47,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:47,950 INFO L87 Difference]: Start difference. First operand 3741 states and 6135 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 14:41:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:48,747 INFO L93 Difference]: Finished difference Result 5229 states and 8277 transitions. [2022-11-23 14:41:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:48,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 109 [2022-11-23 14:41:48,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:48,794 INFO L225 Difference]: With dead ends: 5229 [2022-11-23 14:41:48,794 INFO L226 Difference]: Without dead ends: 3751 [2022-11-23 14:41:48,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 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 14:41:48,802 INFO L413 NwaCegarLoop]: 3217 mSDtfsCounter, 102 mSDsluCounter, 3147 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:48,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6364 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:41:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-11-23 14:41:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 3733. [2022-11-23 14:41:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3263 states have (on average 1.681581366840331) internal successors, (5487), 3277 states have internal predecessors, (5487), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-23 14:41:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 6087 transitions. [2022-11-23 14:41:49,034 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 6087 transitions. Word has length 109 [2022-11-23 14:41:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:49,035 INFO L495 AbstractCegarLoop]: Abstraction has 3733 states and 6087 transitions. [2022-11-23 14:41:49,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 14:41:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 6087 transitions. [2022-11-23 14:41:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:41:49,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:49,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:49,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:49,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 14:41:49,250 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:49,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:49,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1225921311, now seen corresponding path program 1 times [2022-11-23 14:41:49,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:49,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023169272] [2022-11-23 14:41:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:49,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:41:49,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:49,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023169272] [2022-11-23 14:41:49,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023169272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:49,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666775351] [2022-11-23 14:41:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:49,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:49,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:49,556 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:49,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:41:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:49,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:41:49,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:41:49,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:49,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666775351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:49,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:41:49,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:41:49,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454341658] [2022-11-23 14:41:49,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:49,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:49,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:49,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:49,808 INFO L87 Difference]: Start difference. First operand 3733 states and 6087 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 14:41:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:50,504 INFO L93 Difference]: Finished difference Result 5579 states and 8550 transitions. [2022-11-23 14:41:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:50,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 109 [2022-11-23 14:41:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:50,521 INFO L225 Difference]: With dead ends: 5579 [2022-11-23 14:41:50,521 INFO L226 Difference]: Without dead ends: 4181 [2022-11-23 14:41:50,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 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 14:41:50,531 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 3369 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3369 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:50,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3369 Valid, 3191 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:41:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2022-11-23 14:41:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4181. [2022-11-23 14:41:50,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 3647 states have (on average 1.6262681656155744) internal successors, (5931), 3661 states have internal predecessors, (5931), 320 states have call successors, (320), 212 states have call predecessors, (320), 212 states have return successors, (320), 308 states have call predecessors, (320), 320 states have call successors, (320) [2022-11-23 14:41:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 6571 transitions. [2022-11-23 14:41:50,939 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 6571 transitions. Word has length 109 [2022-11-23 14:41:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:50,940 INFO L495 AbstractCegarLoop]: Abstraction has 4181 states and 6571 transitions. [2022-11-23 14:41:50,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 14:41:50,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 6571 transitions. [2022-11-23 14:41:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-23 14:41:50,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:50,949 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:50,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:51,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 14:41:51,156 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1775648256, now seen corresponding path program 1 times [2022-11-23 14:41:51,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:51,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24769239] [2022-11-23 14:41:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:51,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:41:51,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:51,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24769239] [2022-11-23 14:41:51,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24769239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:51,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926475104] [2022-11-23 14:41:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:51,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:51,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:51,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:41:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:41:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:41:51,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:51,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926475104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:51,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:41:51,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:41:51,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025705683] [2022-11-23 14:41:51,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:51,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:51,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:51,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:51,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:51,722 INFO L87 Difference]: Start difference. First operand 4181 states and 6571 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 14:41:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:52,629 INFO L93 Difference]: Finished difference Result 7683 states and 11232 transitions. [2022-11-23 14:41:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:52,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 110 [2022-11-23 14:41:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:52,652 INFO L225 Difference]: With dead ends: 7683 [2022-11-23 14:41:52,652 INFO L226 Difference]: Without dead ends: 5149 [2022-11-23 14:41:52,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 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 14:41:52,662 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 49 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:52,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 6326 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:41:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2022-11-23 14:41:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 4477. [2022-11-23 14:41:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 3907 states have (on average 1.6204248784233428) internal successors, (6331), 3922 states have internal predecessors, (6331), 338 states have call successors, (338), 230 states have call predecessors, (338), 230 states have return successors, (338), 325 states have call predecessors, (338), 338 states have call successors, (338) [2022-11-23 14:41:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 7007 transitions. [2022-11-23 14:41:52,975 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 7007 transitions. Word has length 110 [2022-11-23 14:41:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:52,976 INFO L495 AbstractCegarLoop]: Abstraction has 4477 states and 7007 transitions. [2022-11-23 14:41:52,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 14:41:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 7007 transitions. [2022-11-23 14:41:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 14:41:52,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:52,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:52,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:53,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:53,197 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash -117604901, now seen corresponding path program 1 times [2022-11-23 14:41:53,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:53,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670119655] [2022-11-23 14:41:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:53,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 14:41:53,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:53,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670119655] [2022-11-23 14:41:53,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670119655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:53,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652634255] [2022-11-23 14:41:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:53,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:53,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:53,350 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:53,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:41:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:53,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:41:53,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:41:53,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:53,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652634255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:53,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:41:53,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 14:41:53,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988445707] [2022-11-23 14:41:53,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:53,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:53,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:53,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:41:53,586 INFO L87 Difference]: Start difference. First operand 4477 states and 7007 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 14:41:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:54,700 INFO L93 Difference]: Finished difference Result 6987 states and 10395 transitions. [2022-11-23 14:41:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:54,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 111 [2022-11-23 14:41:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:54,724 INFO L225 Difference]: With dead ends: 6987 [2022-11-23 14:41:54,724 INFO L226 Difference]: Without dead ends: 5529 [2022-11-23 14:41:54,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 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 14:41:54,732 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 63 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:54,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 6380 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:41:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2022-11-23 14:41:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 4957. [2022-11-23 14:41:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4323 states have (on average 1.6069858894286375) internal successors, (6947), 4338 states have internal predecessors, (6947), 370 states have call successors, (370), 262 states have call predecessors, (370), 262 states have return successors, (370), 357 states have call predecessors, (370), 370 states have call successors, (370) [2022-11-23 14:41:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 7687 transitions. [2022-11-23 14:41:55,236 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 7687 transitions. Word has length 111 [2022-11-23 14:41:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:55,237 INFO L495 AbstractCegarLoop]: Abstraction has 4957 states and 7687 transitions. [2022-11-23 14:41:55,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 14:41:55,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 7687 transitions. [2022-11-23 14:41:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 14:41:55,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:55,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:55,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:55,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:55,458 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:55,459 INFO L85 PathProgramCache]: Analyzing trace with hash -629796505, now seen corresponding path program 1 times [2022-11-23 14:41:55,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:55,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357488502] [2022-11-23 14:41:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:55,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 14:41:55,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:55,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357488502] [2022-11-23 14:41:55,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357488502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:55,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965382940] [2022-11-23 14:41:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:55,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:55,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:55,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:41:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:55,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:41:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:41:55,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:55,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965382940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:55,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:41:55,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 14:41:55,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082884821] [2022-11-23 14:41:55,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:55,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:41:55,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:55,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:41:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:41:55,911 INFO L87 Difference]: Start difference. First operand 4957 states and 7687 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 14:41:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:57,099 INFO L93 Difference]: Finished difference Result 7815 states and 11567 transitions. [2022-11-23 14:41:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:41:57,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 111 [2022-11-23 14:41:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:57,125 INFO L225 Difference]: With dead ends: 7815 [2022-11-23 14:41:57,125 INFO L226 Difference]: Without dead ends: 6109 [2022-11-23 14:41:57,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 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 14:41:57,134 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 57 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6375 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:57,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6375 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:41:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2022-11-23 14:41:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 5621. [2022-11-23 14:41:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 4891 states have (on average 1.5863831527295031) internal successors, (7759), 4906 states have internal predecessors, (7759), 418 states have call successors, (418), 310 states have call predecessors, (418), 310 states have return successors, (418), 405 states have call predecessors, (418), 418 states have call successors, (418) [2022-11-23 14:41:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 8595 transitions. [2022-11-23 14:41:57,681 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 8595 transitions. Word has length 111 [2022-11-23 14:41:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:57,681 INFO L495 AbstractCegarLoop]: Abstraction has 5621 states and 8595 transitions. [2022-11-23 14:41:57,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 14:41:57,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 8595 transitions. [2022-11-23 14:41:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 14:41:57,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:57,694 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:57,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:57,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:41:57,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:57,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1643957699, now seen corresponding path program 1 times [2022-11-23 14:41:57,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:57,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259715363] [2022-11-23 14:41:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:57,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 14:41:58,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:58,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259715363] [2022-11-23 14:41:58,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259715363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:58,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679576107] [2022-11-23 14:41:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:58,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:58,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:58,216 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:58,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:41:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:58,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:41:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:41:58,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:58,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679576107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:58,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:41:58,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-23 14:41:58,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299104674] [2022-11-23 14:41:58,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:58,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:41:58,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:41:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:58,589 INFO L87 Difference]: Start difference. First operand 5621 states and 8595 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:42:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:00,105 INFO L93 Difference]: Finished difference Result 11073 states and 15837 transitions. [2022-11-23 14:42:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:42:00,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-11-23 14:42:00,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:00,131 INFO L225 Difference]: With dead ends: 11073 [2022-11-23 14:42:00,131 INFO L226 Difference]: Without dead ends: 7099 [2022-11-23 14:42:00,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:00,143 INFO L413 NwaCegarLoop]: 3166 mSDtfsCounter, 3560 mSDsluCounter, 6270 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3572 SdHoareTripleChecker+Valid, 9436 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:00,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3572 Valid, 9436 Invalid, 875 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [104 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:42:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-11-23 14:42:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 7097. [2022-11-23 14:42:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 6065 states have (on average 1.523330585325639) internal successors, (9239), 6086 states have internal predecessors, (9239), 592 states have call successors, (592), 438 states have call predecessors, (592), 438 states have return successors, (592), 573 states have call predecessors, (592), 592 states have call successors, (592) [2022-11-23 14:42:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 10423 transitions. [2022-11-23 14:42:00,805 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 10423 transitions. Word has length 111 [2022-11-23 14:42:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:00,806 INFO L495 AbstractCegarLoop]: Abstraction has 7097 states and 10423 transitions. [2022-11-23 14:42:00,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:42:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 10423 transitions. [2022-11-23 14:42:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 14:42:00,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:00,822 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:00,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:01,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:42:01,029 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:01,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:01,030 INFO L85 PathProgramCache]: Analyzing trace with hash -799030835, now seen corresponding path program 1 times [2022-11-23 14:42:01,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:01,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048161609] [2022-11-23 14:42:01,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:01,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 14:42:01,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048161609] [2022-11-23 14:42:01,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048161609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202582742] [2022-11-23 14:42:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:01,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:01,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:01,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:42:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:01,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:42:01,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:42:01,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:01,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202582742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:01,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:01,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-23 14:42:01,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853762156] [2022-11-23 14:42:01,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:01,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:42:01,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:42:01,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:42:01,641 INFO L87 Difference]: Start difference. First operand 7097 states and 10423 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:42:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:03,312 INFO L93 Difference]: Finished difference Result 14609 states and 20208 transitions. [2022-11-23 14:42:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:42:03,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-23 14:42:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:03,350 INFO L225 Difference]: With dead ends: 14609 [2022-11-23 14:42:03,350 INFO L226 Difference]: Without dead ends: 9159 [2022-11-23 14:42:03,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:03,372 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 6897 mSDsluCounter, 6224 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6909 SdHoareTripleChecker+Valid, 9382 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:03,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6909 Valid, 9382 Invalid, 881 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [139 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:42:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9159 states. [2022-11-23 14:42:04,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9159 to 9157. [2022-11-23 14:42:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 7695 states have (on average 1.462508122157245) internal successors, (11254), 7725 states have internal predecessors, (11254), 840 states have call successors, (840), 620 states have call predecessors, (840), 620 states have return successors, (840), 812 states have call predecessors, (840), 840 states have call successors, (840) [2022-11-23 14:42:04,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 12934 transitions. [2022-11-23 14:42:04,314 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 12934 transitions. Word has length 112 [2022-11-23 14:42:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:04,315 INFO L495 AbstractCegarLoop]: Abstraction has 9157 states and 12934 transitions. [2022-11-23 14:42:04,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:42:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 12934 transitions. [2022-11-23 14:42:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 14:42:04,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:04,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:04,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:04,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:04,540 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash -570833092, now seen corresponding path program 1 times [2022-11-23 14:42:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:04,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448167109] [2022-11-23 14:42:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:04,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:42:04,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448167109] [2022-11-23 14:42:04,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448167109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:04,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835565116] [2022-11-23 14:42:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:04,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:04,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:04,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:04,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:42:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:42:04,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:42:05,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:05,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835565116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:05,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:05,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-23 14:42:05,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182752902] [2022-11-23 14:42:05,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:05,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:42:05,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:05,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:42:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:42:05,024 INFO L87 Difference]: Start difference. First operand 9157 states and 12934 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:42:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:06,492 INFO L93 Difference]: Finished difference Result 12316 states and 17008 transitions. [2022-11-23 14:42:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:42:06,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-23 14:42:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:06,530 INFO L225 Difference]: With dead ends: 12316 [2022-11-23 14:42:06,531 INFO L226 Difference]: Without dead ends: 9627 [2022-11-23 14:42:06,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:42:06,544 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3373 mSDsluCounter, 3302 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3373 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:06,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3373 Valid, 6522 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:42:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2022-11-23 14:42:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 9399. [2022-11-23 14:42:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 7890 states have (on average 1.4574144486692016) internal successors, (11499), 7938 states have internal predecessors, (11499), 847 states have call successors, (847), 624 states have call predecessors, (847), 660 states have return successors, (883), 837 states have call predecessors, (883), 847 states have call successors, (883) [2022-11-23 14:42:07,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 13229 transitions. [2022-11-23 14:42:07,323 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 13229 transitions. Word has length 116 [2022-11-23 14:42:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:07,324 INFO L495 AbstractCegarLoop]: Abstraction has 9399 states and 13229 transitions. [2022-11-23 14:42:07,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:42:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 13229 transitions. [2022-11-23 14:42:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 14:42:07,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:07,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:07,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:07,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:42:07,554 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash 156707491, now seen corresponding path program 1 times [2022-11-23 14:42:07,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:07,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417966256] [2022-11-23 14:42:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:07,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:42:07,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417966256] [2022-11-23 14:42:07,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417966256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470159149] [2022-11-23 14:42:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:07,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:07,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:07,633 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:07,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:42:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:07,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:42:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:42:07,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:07,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470159149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:07,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:07,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-23 14:42:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456937262] [2022-11-23 14:42:07,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:07,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:42:07,857 INFO L87 Difference]: Start difference. First operand 9399 states and 13229 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 14:42:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:09,227 INFO L93 Difference]: Finished difference Result 12154 states and 16848 transitions. [2022-11-23 14:42:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:09,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 117 [2022-11-23 14:42:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:09,266 INFO L225 Difference]: With dead ends: 12154 [2022-11-23 14:42:09,266 INFO L226 Difference]: Without dead ends: 9141 [2022-11-23 14:42:09,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 14:42:09,277 INFO L413 NwaCegarLoop]: 3169 mSDtfsCounter, 22 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6321 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:09,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6321 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:42:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9141 states. [2022-11-23 14:42:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9141 to 8730. [2022-11-23 14:42:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 7329 states have (on average 1.4719607040523945) internal successors, (10788), 7350 states have internal predecessors, (10788), 811 states have call successors, (811), 588 states have call predecessors, (811), 588 states have return successors, (811), 792 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-23 14:42:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 12410 transitions. [2022-11-23 14:42:10,030 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 12410 transitions. Word has length 117 [2022-11-23 14:42:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:10,031 INFO L495 AbstractCegarLoop]: Abstraction has 8730 states and 12410 transitions. [2022-11-23 14:42:10,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 14:42:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 12410 transitions. [2022-11-23 14:42:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 14:42:10,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:10,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:10,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:10,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:42:10,256 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1491826406, now seen corresponding path program 1 times [2022-11-23 14:42:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:10,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742132093] [2022-11-23 14:42:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:10,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:42:10,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:10,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742132093] [2022-11-23 14:42:10,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742132093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:10,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988455751] [2022-11-23 14:42:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:10,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:10,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:10,444 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:10,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:42:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:10,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:42:10,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:42:10,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:10,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988455751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:10,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:10,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-23 14:42:10,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121818797] [2022-11-23 14:42:10,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:10,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:10,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:10,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:10,738 INFO L87 Difference]: Start difference. First operand 8730 states and 12410 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 14:42:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:12,133 INFO L93 Difference]: Finished difference Result 14729 states and 20254 transitions. [2022-11-23 14:42:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:12,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 117 [2022-11-23 14:42:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:12,178 INFO L225 Difference]: With dead ends: 14729 [2022-11-23 14:42:12,178 INFO L226 Difference]: Without dead ends: 9757 [2022-11-23 14:42:12,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:12,192 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3344 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3344 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:12,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3344 Valid, 3207 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:42:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2022-11-23 14:42:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 9665. [2022-11-23 14:42:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9665 states, 8189 states have (on average 1.4359506655269263) internal successors, (11759), 8210 states have internal predecessors, (11759), 821 states have call successors, (821), 653 states have call predecessors, (821), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-23 14:42:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9665 states to 9665 states and 13457 transitions. [2022-11-23 14:42:13,382 INFO L78 Accepts]: Start accepts. Automaton has 9665 states and 13457 transitions. Word has length 117 [2022-11-23 14:42:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:13,382 INFO L495 AbstractCegarLoop]: Abstraction has 9665 states and 13457 transitions. [2022-11-23 14:42:13,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 14:42:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 9665 states and 13457 transitions. [2022-11-23 14:42:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 14:42:13,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:13,400 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:13,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:13,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:13,607 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:13,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:13,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1363633466, now seen corresponding path program 1 times [2022-11-23 14:42:13,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:13,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431722252] [2022-11-23 14:42:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:13,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-23 14:42:13,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431722252] [2022-11-23 14:42:13,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431722252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520030145] [2022-11-23 14:42:13,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:13,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:13,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:13,698 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:13,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:42:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:42:13,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:42:13,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:13,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520030145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:13,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:13,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-23 14:42:13,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481698367] [2022-11-23 14:42:13,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:13,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:13,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:13,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:42:13,962 INFO L87 Difference]: Start difference. First operand 9665 states and 13457 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 14:42:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:15,367 INFO L93 Difference]: Finished difference Result 15251 states and 20837 transitions. [2022-11-23 14:42:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 117 [2022-11-23 14:42:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:15,405 INFO L225 Difference]: With dead ends: 15251 [2022-11-23 14:42:15,405 INFO L226 Difference]: Without dead ends: 9649 [2022-11-23 14:42:15,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 14:42:15,421 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 86 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:15,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 6380 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:42:15,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9649 states. [2022-11-23 14:42:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9649 to 9537. [2022-11-23 14:42:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 8061 states have (on average 1.4150849770499938) internal successors, (11407), 8082 states have internal predecessors, (11407), 821 states have call successors, (821), 653 states have call predecessors, (821), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-23 14:42:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 13105 transitions. [2022-11-23 14:42:16,509 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 13105 transitions. Word has length 117 [2022-11-23 14:42:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:16,509 INFO L495 AbstractCegarLoop]: Abstraction has 9537 states and 13105 transitions. [2022-11-23 14:42:16,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 14:42:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 13105 transitions. [2022-11-23 14:42:16,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 14:42:16,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:16,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:16,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:16,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:42:16,734 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:16,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1683733287, now seen corresponding path program 1 times [2022-11-23 14:42:16,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:16,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215559625] [2022-11-23 14:42:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:16,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:42:17,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:17,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215559625] [2022-11-23 14:42:17,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215559625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:17,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:17,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 14:42:17,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668104893] [2022-11-23 14:42:17,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:17,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:42:17,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:42:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:17,375 INFO L87 Difference]: Start difference. First operand 9537 states and 13105 transitions. Second operand has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 14:42:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:20,910 INFO L93 Difference]: Finished difference Result 21997 states and 29098 transitions. [2022-11-23 14:42:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 14:42:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 114 [2022-11-23 14:42:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:20,968 INFO L225 Difference]: With dead ends: 21997 [2022-11-23 14:42:20,969 INFO L226 Difference]: Without dead ends: 18009 [2022-11-23 14:42:20,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:42:20,986 INFO L413 NwaCegarLoop]: 3124 mSDtfsCounter, 10560 mSDsluCounter, 12533 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10575 SdHoareTripleChecker+Valid, 15657 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:20,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10575 Valid, 15657 Invalid, 2041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [309 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 14:42:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2022-11-23 14:42:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 15807. [2022-11-23 14:42:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15807 states, 13287 states have (on average 1.342891548129751) internal successors, (17843), 13320 states have internal predecessors, (17843), 1367 states have call successors, (1367), 1151 states have call predecessors, (1367), 1151 states have return successors, (1464), 1336 states have call predecessors, (1464), 1367 states have call successors, (1464) [2022-11-23 14:42:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15807 states to 15807 states and 20674 transitions. [2022-11-23 14:42:22,666 INFO L78 Accepts]: Start accepts. Automaton has 15807 states and 20674 transitions. Word has length 114 [2022-11-23 14:42:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:22,667 INFO L495 AbstractCegarLoop]: Abstraction has 15807 states and 20674 transitions. [2022-11-23 14:42:22,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 14:42:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 15807 states and 20674 transitions. [2022-11-23 14:42:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 14:42:22,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:22,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:42:22,689 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2001044955, now seen corresponding path program 1 times [2022-11-23 14:42:22,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:22,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124016365] [2022-11-23 14:42:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:42:22,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:22,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124016365] [2022-11-23 14:42:22,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124016365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:22,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:22,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:42:22,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390612998] [2022-11-23 14:42:22,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:22,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:42:22,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:42:22,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:22,922 INFO L87 Difference]: Start difference. First operand 15807 states and 20674 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:42:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:25,889 INFO L93 Difference]: Finished difference Result 24037 states and 30733 transitions. [2022-11-23 14:42:25,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:42:25,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-23 14:42:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:25,944 INFO L225 Difference]: With dead ends: 24037 [2022-11-23 14:42:25,944 INFO L226 Difference]: Without dead ends: 16805 [2022-11-23 14:42:25,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:42:25,964 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 94 mSDsluCounter, 9420 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 12631 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:25,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 12631 Invalid, 1120 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:42:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2022-11-23 14:42:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 16129. [2022-11-23 14:42:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16129 states, 13391 states have (on average 1.324994399223359) internal successors, (17743), 13457 states have internal predecessors, (17743), 1494 states have call successors, (1494), 1236 states have call predecessors, (1494), 1242 states have return successors, (1656), 1436 states have call predecessors, (1656), 1494 states have call successors, (1656) [2022-11-23 14:42:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16129 states to 16129 states and 20893 transitions. [2022-11-23 14:42:27,578 INFO L78 Accepts]: Start accepts. Automaton has 16129 states and 20893 transitions. Word has length 115 [2022-11-23 14:42:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:27,578 INFO L495 AbstractCegarLoop]: Abstraction has 16129 states and 20893 transitions. [2022-11-23 14:42:27,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:42:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 16129 states and 20893 transitions. [2022-11-23 14:42:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 14:42:27,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:27,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:27,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 14:42:27,595 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:27,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1313391497, now seen corresponding path program 1 times [2022-11-23 14:42:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:27,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373308950] [2022-11-23 14:42:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:27,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:42:27,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373308950] [2022-11-23 14:42:27,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373308950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442725476] [2022-11-23 14:42:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:27,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:27,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:27,829 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:27,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 14:42:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:42:27,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:28,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:28,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442725476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:28,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:28,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-23 14:42:28,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528602351] [2022-11-23 14:42:28,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:28,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:42:28,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:42:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:28,079 INFO L87 Difference]: Start difference. First operand 16129 states and 20893 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 14:42:31,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:31,296 INFO L93 Difference]: Finished difference Result 31038 states and 39132 transitions. [2022-11-23 14:42:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:42:31,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-11-23 14:42:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:31,362 INFO L225 Difference]: With dead ends: 31038 [2022-11-23 14:42:31,363 INFO L226 Difference]: Without dead ends: 21336 [2022-11-23 14:42:31,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:31,390 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 197 mSDsluCounter, 12486 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 15702 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:31,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 15702 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:42:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21336 states. [2022-11-23 14:42:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21336 to 20074. [2022-11-23 14:42:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20074 states, 16515 states have (on average 1.2927641537995762) internal successors, (21350), 16578 states have internal predecessors, (21350), 1966 states have call successors, (1966), 1603 states have call predecessors, (1966), 1591 states have return successors, (2260), 1893 states have call predecessors, (2260), 1966 states have call successors, (2260) [2022-11-23 14:42:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20074 states to 20074 states and 25576 transitions. [2022-11-23 14:42:33,929 INFO L78 Accepts]: Start accepts. Automaton has 20074 states and 25576 transitions. Word has length 116 [2022-11-23 14:42:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:33,930 INFO L495 AbstractCegarLoop]: Abstraction has 20074 states and 25576 transitions. [2022-11-23 14:42:33,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 14:42:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 20074 states and 25576 transitions. [2022-11-23 14:42:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 14:42:33,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:33,953 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:33,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:34,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 14:42:34,160 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:34,161 INFO L85 PathProgramCache]: Analyzing trace with hash 507298014, now seen corresponding path program 1 times [2022-11-23 14:42:34,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:34,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168690732] [2022-11-23 14:42:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:34,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 14:42:34,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:34,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168690732] [2022-11-23 14:42:34,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168690732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:34,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324588111] [2022-11-23 14:42:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:34,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:34,374 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:34,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 14:42:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:42:34,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:42:34,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:34,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324588111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:34,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:34,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-23 14:42:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965507820] [2022-11-23 14:42:34,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:34,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:34,670 INFO L87 Difference]: Start difference. First operand 20074 states and 25576 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 14:42:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:37,513 INFO L93 Difference]: Finished difference Result 35206 states and 44397 transitions. [2022-11-23 14:42:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:37,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 141 [2022-11-23 14:42:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:37,571 INFO L225 Difference]: With dead ends: 35206 [2022-11-23 14:42:37,571 INFO L226 Difference]: Without dead ends: 22349 [2022-11-23 14:42:37,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:37,597 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3345 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3345 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:37,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3345 Valid, 3207 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:42:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22349 states. [2022-11-23 14:42:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22349 to 21575. [2022-11-23 14:42:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21575 states, 17881 states have (on average 1.2700072702868968) internal successors, (22709), 18019 states have internal predecessors, (22709), 1966 states have call successors, (1966), 1654 states have call predecessors, (1966), 1726 states have return successors, (2383), 1902 states have call predecessors, (2383), 1966 states have call successors, (2383) [2022-11-23 14:42:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21575 states to 21575 states and 27058 transitions. [2022-11-23 14:42:39,993 INFO L78 Accepts]: Start accepts. Automaton has 21575 states and 27058 transitions. Word has length 141 [2022-11-23 14:42:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:39,994 INFO L495 AbstractCegarLoop]: Abstraction has 21575 states and 27058 transitions. [2022-11-23 14:42:39,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 14:42:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 21575 states and 27058 transitions. [2022-11-23 14:42:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 14:42:40,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:40,016 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:40,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:40,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:40,223 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:40,223 INFO L85 PathProgramCache]: Analyzing trace with hash 428855611, now seen corresponding path program 1 times [2022-11-23 14:42:40,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:40,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496305491] [2022-11-23 14:42:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:40,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-23 14:42:40,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:40,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496305491] [2022-11-23 14:42:40,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496305491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:40,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115322645] [2022-11-23 14:42:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:40,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:40,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:40,308 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:40,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 14:42:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:40,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:42:40,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 14:42:40,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:40,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115322645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:40,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:40,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-23 14:42:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806461664] [2022-11-23 14:42:40,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:40,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:42:40,529 INFO L87 Difference]: Start difference. First operand 21575 states and 27058 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 14:42:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:43,521 INFO L93 Difference]: Finished difference Result 35655 states and 44777 transitions. [2022-11-23 14:42:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 141 [2022-11-23 14:42:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:43,586 INFO L225 Difference]: With dead ends: 35655 [2022-11-23 14:42:43,586 INFO L226 Difference]: Without dead ends: 21526 [2022-11-23 14:42:43,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 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 14:42:43,612 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 85 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 6371 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:43,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 6371 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:42:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21526 states. [2022-11-23 14:42:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21526 to 21359. [2022-11-23 14:42:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21359 states, 17665 states have (on average 1.2407585621285027) internal successors, (21918), 17803 states have internal predecessors, (21918), 1966 states have call successors, (1966), 1654 states have call predecessors, (1966), 1726 states have return successors, (2383), 1902 states have call predecessors, (2383), 1966 states have call successors, (2383) [2022-11-23 14:42:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21359 states to 21359 states and 26267 transitions. [2022-11-23 14:42:46,484 INFO L78 Accepts]: Start accepts. Automaton has 21359 states and 26267 transitions. Word has length 141 [2022-11-23 14:42:46,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:46,485 INFO L495 AbstractCegarLoop]: Abstraction has 21359 states and 26267 transitions. [2022-11-23 14:42:46,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 14:42:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 21359 states and 26267 transitions. [2022-11-23 14:42:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:42:46,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:46,505 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:46,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:46,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:46,712 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:46,713 INFO L85 PathProgramCache]: Analyzing trace with hash -21266982, now seen corresponding path program 1 times [2022-11-23 14:42:46,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:46,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862960386] [2022-11-23 14:42:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:46,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-23 14:42:46,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:46,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862960386] [2022-11-23 14:42:46,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862960386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:46,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217410084] [2022-11-23 14:42:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:46,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:46,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:46,981 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:47,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 14:42:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:42:47,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:42:47,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:47,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217410084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:47,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:47,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-23 14:42:47,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018332802] [2022-11-23 14:42:47,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:47,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:42:47,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:47,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:42:47,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:47,307 INFO L87 Difference]: Start difference. First operand 21359 states and 26267 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 14:42:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:51,537 INFO L93 Difference]: Finished difference Result 41136 states and 49552 transitions. [2022-11-23 14:42:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:42:51,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-11-23 14:42:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:51,611 INFO L225 Difference]: With dead ends: 41136 [2022-11-23 14:42:51,611 INFO L226 Difference]: Without dead ends: 27280 [2022-11-23 14:42:51,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:51,643 INFO L413 NwaCegarLoop]: 3213 mSDtfsCounter, 210 mSDsluCounter, 9350 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 12563 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:51,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 12563 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:42:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27280 states. [2022-11-23 14:42:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27280 to 25890. [2022-11-23 14:42:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25890 states, 21282 states have (on average 1.2168499201202894) internal successors, (25897), 21467 states have internal predecessors, (25897), 2460 states have call successors, (2460), 2046 states have call predecessors, (2460), 2146 states have return successors, (3151), 2377 states have call predecessors, (3151), 2460 states have call successors, (3151) [2022-11-23 14:42:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25890 states to 25890 states and 31508 transitions. [2022-11-23 14:42:54,668 INFO L78 Accepts]: Start accepts. Automaton has 25890 states and 31508 transitions. Word has length 144 [2022-11-23 14:42:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:54,668 INFO L495 AbstractCegarLoop]: Abstraction has 25890 states and 31508 transitions. [2022-11-23 14:42:54,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 14:42:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 25890 states and 31508 transitions. [2022-11-23 14:42:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-23 14:42:54,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:54,697 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:54,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:54,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 14:42:54,907 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash 609191606, now seen corresponding path program 1 times [2022-11-23 14:42:54,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:54,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410422650] [2022-11-23 14:42:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:54,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 14:42:55,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410422650] [2022-11-23 14:42:55,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410422650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277869903] [2022-11-23 14:42:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:55,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:55,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:55,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:55,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9918a3e6-50c3-4a30-9b04-71ad884027b7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 14:42:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:55,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:42:55,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 14:42:56,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-23 14:42:56,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277869903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:56,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121536576] [2022-11-23 14:42:56,621 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-23 14:42:56,621 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:56,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:56,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:56,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs