./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta --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 8ff0a322ea14915785d13405f40f59a899d91f6127d01ad0d503cb7ec027b40c --- 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-dbf71c6-m [2022-10-17 17:36:05,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:36:05,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:36:05,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:36:05,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:36:05,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:36:05,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:36:05,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:36:05,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:36:05,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:36:05,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:36:05,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:36:05,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:36:05,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:36:05,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:36:05,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:36:05,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:36:05,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:36:05,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:36:05,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:36:05,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:36:05,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:36:05,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:36:05,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:36:05,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:36:05,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:36:05,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:36:05,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:36:05,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:36:05,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:36:05,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:36:05,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:36:05,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:36:05,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:36:05,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:36:05,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:36:05,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:36:05,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:36:05,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:36:05,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:36:05,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:36:05,169 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:36:05,220 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:36:05,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:36:05,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:36:05,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:36:05,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:36:05,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:36:05,223 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:36:05,223 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:36:05,224 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:36:05,224 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:36:05,225 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:36:05,225 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:36:05,225 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:36:05,226 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:36:05,226 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:36:05,226 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:36:05,226 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:36:05,227 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:36:05,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:36:05,228 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:36:05,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:36:05,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:36:05,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:36:05,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:36:05,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:36:05,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:36:05,230 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:36:05,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:36:05,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:36:05,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:36:05,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:36:05,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:36:05,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:05,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:36:05,232 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:36:05,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:36:05,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:36:05,233 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:36:05,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:36:05,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:36:05,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:36:05,234 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_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ff0a322ea14915785d13405f40f59a899d91f6127d01ad0d503cb7ec027b40c [2022-10-17 17:36:05,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:36:05,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:36:05,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:36:05,602 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:36:05,603 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:36:05,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c [2022-10-17 17:36:05,659 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/data/452f73cdf/8831da13934e446589910cdddf4e646d/FLAGe6403bfcd [2022-10-17 17:36:06,260 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:36:06,267 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c [2022-10-17 17:36:06,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/data/452f73cdf/8831da13934e446589910cdddf4e646d/FLAGe6403bfcd [2022-10-17 17:36:06,560 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/data/452f73cdf/8831da13934e446589910cdddf4e646d [2022-10-17 17:36:06,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:36:06,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:36:06,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:06,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:36:06,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:36:06,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:06" (1/1) ... [2022-10-17 17:36:06,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d05b0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:06, skipping insertion in model container [2022-10-17 17:36:06,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:06" (1/1) ... [2022-10-17 17:36:06,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:36:06,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:36:06,843 WARN L230 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_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c[911,924] [2022-10-17 17:36:06,905 WARN L230 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_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c[8416,8429] [2022-10-17 17:36:06,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:06,949 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:36:06,963 WARN L230 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_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c[911,924] [2022-10-17 17:36:06,992 WARN L230 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_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c[8416,8429] [2022-10-17 17:36:07,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:07,036 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:36:07,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07 WrapperNode [2022-10-17 17:36:07,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:07,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:07,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:36:07,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:36:07,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,121 INFO L138 Inliner]: procedures = 57, calls = 64, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 440 [2022-10-17 17:36:07,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:07,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:36:07,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:36:07,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:36:07,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,193 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:36:07,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:36:07,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:36:07,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:36:07,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (1/1) ... [2022-10-17 17:36:07,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:07,258 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:36:07,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:36:07,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:36:07,314 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:36:07,314 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:36:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-10-17 17:36:07,315 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-10-17 17:36:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-10-17 17:36:07,315 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-10-17 17:36:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-10-17 17:36:07,315 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-10-17 17:36:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-10-17 17:36:07,316 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-10-17 17:36:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-10-17 17:36:07,316 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-10-17 17:36:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-10-17 17:36:07,316 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-10-17 17:36:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-10-17 17:36:07,317 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-10-17 17:36:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-10-17 17:36:07,317 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-10-17 17:36:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-10-17 17:36:07,317 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-10-17 17:36:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-10-17 17:36:07,318 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-10-17 17:36:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:36:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-10-17 17:36:07,319 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-10-17 17:36:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-10-17 17:36:07,319 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-10-17 17:36:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:36:07,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:36:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-10-17 17:36:07,320 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-10-17 17:36:07,456 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:36:07,459 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:36:08,112 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-10-17 17:36:08,112 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-10-17 17:36:08,161 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:36:08,424 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:36:08,425 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-10-17 17:36:08,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:08 BoogieIcfgContainer [2022-10-17 17:36:08,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:36:08,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:36:08,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:36:08,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:36:08,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:36:06" (1/3) ... [2022-10-17 17:36:08,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4054259b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:08, skipping insertion in model container [2022-10-17 17:36:08,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:07" (2/3) ... [2022-10-17 17:36:08,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4054259b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:08, skipping insertion in model container [2022-10-17 17:36:08,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:08" (3/3) ... [2022-10-17 17:36:08,440 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.01.cil-1.c [2022-10-17 17:36:08,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:36:08,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:36:08,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:36:08,558 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;@1294c63b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:36:08,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:36:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 104 states have internal predecessors, (145), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-10-17 17:36:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 17:36:08,585 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:08,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:08,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:08,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:08,594 INFO L85 PathProgramCache]: Analyzing trace with hash 42980526, now seen corresponding path program 1 times [2022-10-17 17:36:08,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:08,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065458015] [2022-10-17 17:36:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:08,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:09,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:09,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065458015] [2022-10-17 17:36:09,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065458015] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:09,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:09,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:36:09,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882705194] [2022-10-17 17:36:09,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:09,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:36:09,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:36:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:36:09,161 INFO L87 Difference]: Start difference. First operand has 146 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 104 states have internal predecessors, (145), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:36:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:09,861 INFO L93 Difference]: Finished difference Result 505 states and 732 transitions. [2022-10-17 17:36:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:36:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-10-17 17:36:09,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:09,886 INFO L225 Difference]: With dead ends: 505 [2022-10-17 17:36:09,887 INFO L226 Difference]: Without dead ends: 354 [2022-10-17 17:36:09,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:09,904 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 453 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:09,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 495 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:36:09,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-10-17 17:36:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 343. [2022-10-17 17:36:10,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 232 states have (on average 1.3405172413793103) internal successors, (311), 239 states have internal predecessors, (311), 72 states have call successors, (72), 38 states have call predecessors, (72), 37 states have return successors, (88), 67 states have call predecessors, (88), 70 states have call successors, (88) [2022-10-17 17:36:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 471 transitions. [2022-10-17 17:36:10,033 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 471 transitions. Word has length 34 [2022-10-17 17:36:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:10,034 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 471 transitions. [2022-10-17 17:36:10,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:36:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 471 transitions. [2022-10-17 17:36:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 17:36:10,038 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:10,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:36:10,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:10,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash 833281710, now seen corresponding path program 1 times [2022-10-17 17:36:10,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:10,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345001025] [2022-10-17 17:36:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:10,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:10,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345001025] [2022-10-17 17:36:10,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345001025] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:10,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:10,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:36:10,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194630562] [2022-10-17 17:36:10,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:10,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:36:10,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:36:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:36:10,201 INFO L87 Difference]: Start difference. First operand 343 states and 471 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:36:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:10,602 INFO L93 Difference]: Finished difference Result 543 states and 748 transitions. [2022-10-17 17:36:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:36:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-10-17 17:36:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:10,614 INFO L225 Difference]: With dead ends: 543 [2022-10-17 17:36:10,614 INFO L226 Difference]: Without dead ends: 472 [2022-10-17 17:36:10,620 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 [2022-10-17 17:36:10,622 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 251 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:10,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 391 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:36:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-10-17 17:36:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 461. [2022-10-17 17:36:10,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 316 states have (on average 1.3386075949367089) internal successors, (423), 323 states have internal predecessors, (423), 92 states have call successors, (92), 52 states have call predecessors, (92), 51 states have return successors, (111), 87 states have call predecessors, (111), 90 states have call successors, (111) [2022-10-17 17:36:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 626 transitions. [2022-10-17 17:36:10,761 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 626 transitions. Word has length 44 [2022-10-17 17:36:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:10,761 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 626 transitions. [2022-10-17 17:36:10,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:36:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 626 transitions. [2022-10-17 17:36:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 17:36:10,773 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:10,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:10,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:36:10,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:10,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2049754991, now seen corresponding path program 1 times [2022-10-17 17:36:10,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:10,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385848773] [2022-10-17 17:36:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:10,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:10,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385848773] [2022-10-17 17:36:10,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385848773] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:10,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:10,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:36:10,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109432998] [2022-10-17 17:36:10,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:10,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:36:10,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:10,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:36:10,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:10,941 INFO L87 Difference]: Start difference. First operand 461 states and 626 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:36:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:11,732 INFO L93 Difference]: Finished difference Result 998 states and 1349 transitions. [2022-10-17 17:36:11,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:36:11,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-10-17 17:36:11,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:11,739 INFO L225 Difference]: With dead ends: 998 [2022-10-17 17:36:11,740 INFO L226 Difference]: Without dead ends: 532 [2022-10-17 17:36:11,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:36:11,751 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 622 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:11,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 755 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 17:36:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-10-17 17:36:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 447. [2022-10-17 17:36:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 302 states have (on average 1.2913907284768211) internal successors, (390), 309 states have internal predecessors, (390), 92 states have call successors, (92), 52 states have call predecessors, (92), 51 states have return successors, (108), 87 states have call predecessors, (108), 90 states have call successors, (108) [2022-10-17 17:36:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 590 transitions. [2022-10-17 17:36:11,860 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 590 transitions. Word has length 45 [2022-10-17 17:36:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:11,861 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 590 transitions. [2022-10-17 17:36:11,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:36:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 590 transitions. [2022-10-17 17:36:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 17:36:11,866 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:11,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:11,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:36:11,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash 155440008, now seen corresponding path program 1 times [2022-10-17 17:36:11,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:11,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151927072] [2022-10-17 17:36:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:11,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:12,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:12,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151927072] [2022-10-17 17:36:12,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151927072] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:12,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:12,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:36:12,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052499686] [2022-10-17 17:36:12,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:12,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:36:12,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:12,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:36:12,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:36:12,152 INFO L87 Difference]: Start difference. First operand 447 states and 590 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 17:36:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:12,776 INFO L93 Difference]: Finished difference Result 749 states and 958 transitions. [2022-10-17 17:36:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 17:36:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-10-17 17:36:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:12,782 INFO L225 Difference]: With dead ends: 749 [2022-10-17 17:36:12,782 INFO L226 Difference]: Without dead ends: 575 [2022-10-17 17:36:12,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:36:12,785 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 296 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:12,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 517 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:36:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-10-17 17:36:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 549. [2022-10-17 17:36:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 370 states have (on average 1.2756756756756757) internal successors, (472), 377 states have internal predecessors, (472), 112 states have call successors, (112), 66 states have call predecessors, (112), 65 states have return successors, (128), 107 states have call predecessors, (128), 110 states have call successors, (128) [2022-10-17 17:36:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 712 transitions. [2022-10-17 17:36:12,870 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 712 transitions. Word has length 46 [2022-10-17 17:36:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:12,871 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 712 transitions. [2022-10-17 17:36:12,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 17:36:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 712 transitions. [2022-10-17 17:36:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 17:36:12,873 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:12,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:12,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:36:12,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1186619376, now seen corresponding path program 1 times [2022-10-17 17:36:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:12,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232274617] [2022-10-17 17:36:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:12,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:12,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232274617] [2022-10-17 17:36:12,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232274617] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:12,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:12,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:36:12,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890393324] [2022-10-17 17:36:12,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:12,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:36:12,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:36:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:36:12,926 INFO L87 Difference]: Start difference. First operand 549 states and 712 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:36:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:13,032 INFO L93 Difference]: Finished difference Result 814 states and 1048 transitions. [2022-10-17 17:36:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:36:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-10-17 17:36:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:13,035 INFO L225 Difference]: With dead ends: 814 [2022-10-17 17:36:13,035 INFO L226 Difference]: Without dead ends: 268 [2022-10-17 17:36:13,037 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 [2022-10-17 17:36:13,038 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 159 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:13,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 143 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:36:13,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-10-17 17:36:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-10-17 17:36:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 181 states have (on average 1.3093922651933703) internal successors, (237), 185 states have internal predecessors, (237), 56 states have call successors, (56), 30 states have call predecessors, (56), 30 states have return successors, (74), 53 states have call predecessors, (74), 56 states have call successors, (74) [2022-10-17 17:36:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 367 transitions. [2022-10-17 17:36:13,084 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 367 transitions. Word has length 47 [2022-10-17 17:36:13,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:13,084 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 367 transitions. [2022-10-17 17:36:13,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:36:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 367 transitions. [2022-10-17 17:36:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-17 17:36:13,085 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:13,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:13,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:36:13,086 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:13,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1079891644, now seen corresponding path program 1 times [2022-10-17 17:36:13,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:13,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576292] [2022-10-17 17:36:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:13,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:36:13,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:13,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576292] [2022-10-17 17:36:13,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576292] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:13,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:13,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:36:13,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439017036] [2022-10-17 17:36:13,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:13,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:36:13,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:13,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:36:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:13,309 INFO L87 Difference]: Start difference. First operand 268 states and 367 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 17:36:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:13,566 INFO L93 Difference]: Finished difference Result 675 states and 919 transitions. [2022-10-17 17:36:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:36:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2022-10-17 17:36:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:13,571 INFO L225 Difference]: With dead ends: 675 [2022-10-17 17:36:13,571 INFO L226 Difference]: Without dead ends: 414 [2022-10-17 17:36:13,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-10-17 17:36:13,574 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 160 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:13,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 208 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:36:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-10-17 17:36:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 412. [2022-10-17 17:36:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 277 states have (on average 1.2815884476534296) internal successors, (355), 283 states have internal predecessors, (355), 86 states have call successors, (86), 48 states have call predecessors, (86), 48 states have return successors, (116), 81 states have call predecessors, (116), 86 states have call successors, (116) [2022-10-17 17:36:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 557 transitions. [2022-10-17 17:36:13,645 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 557 transitions. Word has length 59 [2022-10-17 17:36:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:13,646 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 557 transitions. [2022-10-17 17:36:13,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 17:36:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 557 transitions. [2022-10-17 17:36:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-10-17 17:36:13,648 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:13,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:13,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:36:13,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:13,649 INFO L85 PathProgramCache]: Analyzing trace with hash -887495026, now seen corresponding path program 1 times [2022-10-17 17:36:13,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:13,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182390789] [2022-10-17 17:36:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:13,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:36:13,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:13,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182390789] [2022-10-17 17:36:13,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182390789] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:13,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:13,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:36:13,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377381247] [2022-10-17 17:36:13,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:13,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:36:13,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:13,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:36:13,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:36:13,715 INFO L87 Difference]: Start difference. First operand 412 states and 557 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:36:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:13,820 INFO L93 Difference]: Finished difference Result 853 states and 1163 transitions. [2022-10-17 17:36:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:36:13,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2022-10-17 17:36:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:13,825 INFO L225 Difference]: With dead ends: 853 [2022-10-17 17:36:13,825 INFO L226 Difference]: Without dead ends: 499 [2022-10-17 17:36:13,827 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 [2022-10-17 17:36:13,828 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 28 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:13,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 175 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:36:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-10-17 17:36:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 443. [2022-10-17 17:36:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.2913907284768211) internal successors, (390), 308 states have internal predecessors, (390), 89 states have call successors, (89), 51 states have call predecessors, (89), 51 states have return successors, (119), 84 states have call predecessors, (119), 89 states have call successors, (119) [2022-10-17 17:36:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 598 transitions. [2022-10-17 17:36:13,914 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 598 transitions. Word has length 60 [2022-10-17 17:36:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:13,915 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 598 transitions. [2022-10-17 17:36:13,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:36:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 598 transitions. [2022-10-17 17:36:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:36:13,918 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:13,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:13,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:36:13,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1085092601, now seen corresponding path program 1 times [2022-10-17 17:36:13,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:13,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273877458] [2022-10-17 17:36:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:13,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-10-17 17:36:14,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:14,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273877458] [2022-10-17 17:36:14,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273877458] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:14,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119246086] [2022-10-17 17:36:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:14,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:14,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:14,022 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:14,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:36:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:36:14,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:36:14,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:36:14,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119246086] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:14,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:36:14,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-10-17 17:36:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717112098] [2022-10-17 17:36:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:14,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:36:14,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:36:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:14,239 INFO L87 Difference]: Start difference. First operand 443 states and 598 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (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) [2022-10-17 17:36:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:14,372 INFO L93 Difference]: Finished difference Result 845 states and 1149 transitions. [2022-10-17 17:36:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:36:14,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2022-10-17 17:36:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:14,378 INFO L225 Difference]: With dead ends: 845 [2022-10-17 17:36:14,378 INFO L226 Difference]: Without dead ends: 522 [2022-10-17 17:36:14,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:14,380 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 59 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:14,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 92 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:36:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-10-17 17:36:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 507. [2022-10-17 17:36:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 357 states have (on average 1.2773109243697478) internal successors, (456), 362 states have internal predecessors, (456), 89 states have call successors, (89), 59 states have call predecessors, (89), 60 states have return successors, (117), 86 states have call predecessors, (117), 89 states have call successors, (117) [2022-10-17 17:36:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 662 transitions. [2022-10-17 17:36:14,481 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 662 transitions. Word has length 87 [2022-10-17 17:36:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:14,482 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 662 transitions. [2022-10-17 17:36:14,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (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) [2022-10-17 17:36:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 662 transitions. [2022-10-17 17:36:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:36:14,487 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:14,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:14,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:14,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:14,704 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -423758810, now seen corresponding path program 1 times [2022-10-17 17:36:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:14,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045883241] [2022-10-17 17:36:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 17:36:14,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:14,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045883241] [2022-10-17 17:36:14,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045883241] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:14,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080608996] [2022-10-17 17:36:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:14,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:14,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:14,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:14,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:36:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:36:14,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:36:15,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:36:15,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080608996] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:15,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:36:15,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-10-17 17:36:15,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128048547] [2022-10-17 17:36:15,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:15,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:36:15,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:36:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:15,014 INFO L87 Difference]: Start difference. First operand 507 states and 662 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:36:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:15,138 INFO L93 Difference]: Finished difference Result 973 states and 1276 transitions. [2022-10-17 17:36:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:36:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2022-10-17 17:36:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:15,144 INFO L225 Difference]: With dead ends: 973 [2022-10-17 17:36:15,144 INFO L226 Difference]: Without dead ends: 603 [2022-10-17 17:36:15,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:15,149 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 36 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:15,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 178 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:36:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-10-17 17:36:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 533. [2022-10-17 17:36:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 377 states have (on average 1.2811671087533156) internal successors, (483), 382 states have internal predecessors, (483), 92 states have call successors, (92), 62 states have call predecessors, (92), 63 states have return successors, (120), 89 states have call predecessors, (120), 92 states have call successors, (120) [2022-10-17 17:36:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 695 transitions. [2022-10-17 17:36:15,247 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 695 transitions. Word has length 87 [2022-10-17 17:36:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:15,248 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 695 transitions. [2022-10-17 17:36:15,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:36:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 695 transitions. [2022-10-17 17:36:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:36:15,257 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:15,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:15,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:15,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 17:36:15,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:15,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1097850441, now seen corresponding path program 2 times [2022-10-17 17:36:15,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:15,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220086938] [2022-10-17 17:36:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:15,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-17 17:36:15,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:15,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220086938] [2022-10-17 17:36:15,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220086938] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:15,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029889706] [2022-10-17 17:36:15,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:36:15,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:15,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:15,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:15,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:36:15,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:36:15,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:36:15,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:36:15,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:36:15,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:36:15,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029889706] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:15,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:36:15,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:36:15,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303533287] [2022-10-17 17:36:15,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:15,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:36:15,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:36:15,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:15,851 INFO L87 Difference]: Start difference. First operand 533 states and 695 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2022-10-17 17:36:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:15,987 INFO L93 Difference]: Finished difference Result 1036 states and 1393 transitions. [2022-10-17 17:36:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:36:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 87 [2022-10-17 17:36:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:15,992 INFO L225 Difference]: With dead ends: 1036 [2022-10-17 17:36:15,993 INFO L226 Difference]: Without dead ends: 640 [2022-10-17 17:36:15,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:15,995 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 58 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:15,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 180 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:36:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-10-17 17:36:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 620. [2022-10-17 17:36:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 442 states have (on average 1.262443438914027) internal successors, (558), 448 states have internal predecessors, (558), 105 states have call successors, (105), 72 states have call predecessors, (105), 72 states have return successors, (143), 100 states have call predecessors, (143), 105 states have call successors, (143) [2022-10-17 17:36:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 806 transitions. [2022-10-17 17:36:16,089 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 806 transitions. Word has length 87 [2022-10-17 17:36:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:16,089 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 806 transitions. [2022-10-17 17:36:16,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2022-10-17 17:36:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 806 transitions. [2022-10-17 17:36:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-10-17 17:36:16,092 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:16,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:16,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:16,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 17:36:16,308 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -656583507, now seen corresponding path program 1 times [2022-10-17 17:36:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:16,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397601512] [2022-10-17 17:36:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 17:36:16,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:16,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397601512] [2022-10-17 17:36:16,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397601512] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:16,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353643273] [2022-10-17 17:36:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:16,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:16,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:16,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:16,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:36:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:16,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:36:16,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:36:16,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:36:16,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353643273] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:16,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:36:16,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:36:16,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152295128] [2022-10-17 17:36:16,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:16,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:36:16,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:16,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:36:16,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:16,669 INFO L87 Difference]: Start difference. First operand 620 states and 806 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:36:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:16,821 INFO L93 Difference]: Finished difference Result 1467 states and 1905 transitions. [2022-10-17 17:36:16,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:36:16,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 88 [2022-10-17 17:36:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:16,828 INFO L225 Difference]: With dead ends: 1467 [2022-10-17 17:36:16,828 INFO L226 Difference]: Without dead ends: 854 [2022-10-17 17:36:16,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:16,832 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 33 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:16,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 155 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:36:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-10-17 17:36:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 685. [2022-10-17 17:36:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 491 states have (on average 1.264765784114053) internal successors, (621), 498 states have internal predecessors, (621), 113 states have call successors, (113), 80 states have call predecessors, (113), 80 states have return successors, (151), 107 states have call predecessors, (151), 113 states have call successors, (151) [2022-10-17 17:36:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 885 transitions. [2022-10-17 17:36:16,962 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 885 transitions. Word has length 88 [2022-10-17 17:36:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:16,962 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 885 transitions. [2022-10-17 17:36:16,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:36:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 885 transitions. [2022-10-17 17:36:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-10-17 17:36:16,966 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:16,966 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:17,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:17,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 17:36:17,192 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash 191966113, now seen corresponding path program 1 times [2022-10-17 17:36:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:17,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620335852] [2022-10-17 17:36:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:17,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-17 17:36:17,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:17,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620335852] [2022-10-17 17:36:17,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620335852] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:17,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:17,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:36:17,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040292310] [2022-10-17 17:36:17,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:17,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:36:17,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:36:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:36:17,381 INFO L87 Difference]: Start difference. First operand 685 states and 885 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:36:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:17,721 INFO L93 Difference]: Finished difference Result 1656 states and 2112 transitions. [2022-10-17 17:36:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:36:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2022-10-17 17:36:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:17,730 INFO L225 Difference]: With dead ends: 1656 [2022-10-17 17:36:17,730 INFO L226 Difference]: Without dead ends: 1169 [2022-10-17 17:36:17,733 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 [2022-10-17 17:36:17,733 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 131 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:17,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 233 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:36:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-10-17 17:36:17,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1131. [2022-10-17 17:36:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 807 states have (on average 1.255266418835192) internal successors, (1013), 811 states have internal predecessors, (1013), 191 states have call successors, (191), 132 states have call predecessors, (191), 132 states have return successors, (227), 188 states have call predecessors, (227), 191 states have call successors, (227) [2022-10-17 17:36:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1431 transitions. [2022-10-17 17:36:17,945 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1431 transitions. Word has length 89 [2022-10-17 17:36:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:17,945 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1431 transitions. [2022-10-17 17:36:17,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:36:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1431 transitions. [2022-10-17 17:36:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-10-17 17:36:17,948 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:17,949 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:17,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 17:36:17,949 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:17,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1537441805, now seen corresponding path program 1 times [2022-10-17 17:36:17,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:17,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397740731] [2022-10-17 17:36:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:17,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 17:36:18,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:18,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397740731] [2022-10-17 17:36:18,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397740731] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:18,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142186757] [2022-10-17 17:36:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:18,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:18,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:18,195 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:18,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d303f7f-4ddc-4d69-b4ed-8761290fd4c1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:36:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:18,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 17:36:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 50 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:36:18,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:36:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-10-17 17:36:18,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142186757] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:36:18,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680607073] [2022-10-17 17:36:18,810 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-10-17 17:36:18,811 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:36:18,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:36:18,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:36:18,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:36:31,091 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 115 for LOIs [2022-10-17 17:36:31,140 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 57 for LOIs [2022-10-17 17:36:31,148 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 115 for LOIs [2022-10-17 17:36:31,183 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 74 for LOIs [2022-10-17 17:36:31,288 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 119 for LOIs [2022-10-17 17:36:31,561 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 128 for LOIs [2022-10-17 17:36:31,611 INFO L180 IcfgInterpreter]: Interpretation finished