./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:51:20,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:51:20,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:51:20,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:51:20,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:51:20,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:51:20,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:51:20,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:51:20,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:51:20,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:51:20,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:51:20,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:51:20,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:51:20,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:51:20,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:51:20,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:51:20,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:51:20,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:51:20,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:51:20,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:51:21,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:51:21,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:51:21,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:51:21,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:51:21,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:51:21,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:51:21,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:51:21,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:51:21,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:51:21,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:51:21,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:51:21,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:51:21,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:51:21,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:51:21,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:51:21,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:51:21,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:51:21,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:51:21,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:51:21,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:51:21,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:51:21,016 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:51:21,036 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:51:21,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:51:21,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:51:21,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:51:21,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:51:21,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:51:21,037 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:51:21,042 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:51:21,042 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:51:21,043 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:51:21,043 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:51:21,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:51:21,043 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:51:21,044 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:51:21,044 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:51:21,044 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:51:21,044 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:51:21,044 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:51:21,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:51:21,045 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:51:21,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:51:21,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:51:21,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:51:21,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:51:21,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:51:21,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:51:21,046 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:51:21,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:51:21,046 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:51:21,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:51:21,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:51:21,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:51:21,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:51:21,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:51:21,047 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:51:21,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:51:21,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:51:21,047 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:51:21,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:51:21,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:51:21,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:51:21,048 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_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a [2022-12-14 15:51:21,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:51:21,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:51:21,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:51:21,231 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:51:21,231 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:51:21,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2022-12-14 15:51:23,843 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:51:24,023 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:51:24,024 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2022-12-14 15:51:24,039 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/data/dc9ba86c5/0e12174cbc0042f6b5aa1c1297b619e2/FLAGfc459ae5b [2022-12-14 15:51:24,050 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/data/dc9ba86c5/0e12174cbc0042f6b5aa1c1297b619e2 [2022-12-14 15:51:24,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:51:24,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:51:24,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:51:24,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:51:24,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:51:24,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e7cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24, skipping insertion in model container [2022-12-14 15:51:24,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:51:24,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:51:24,256 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2022-12-14 15:51:24,305 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2022-12-14 15:51:24,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:51:24,396 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:51:24,404 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2022-12-14 15:51:24,415 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2022-12-14 15:51:24,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:51:24,472 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:51:24,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24 WrapperNode [2022-12-14 15:51:24,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:51:24,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:51:24,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:51:24,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:51:24,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,523 INFO L138 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1045 [2022-12-14 15:51:24,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:51:24,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:51:24,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:51:24,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:51:24,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,564 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:51:24,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:51:24,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:51:24,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:51:24,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (1/1) ... [2022-12-14 15:51:24,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:51:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:51:24,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:51:24,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:51:24,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:51:24,639 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 15:51:24,640 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 15:51:24,640 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 15:51:24,640 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 15:51:24,640 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 15:51:24,640 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 15:51:24,640 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 15:51:24,640 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 15:51:24,640 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 15:51:24,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 15:51:24,641 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 15:51:24,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 15:51:24,641 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 15:51:24,641 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 15:51:24,641 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 15:51:24,641 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 15:51:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 15:51:24,642 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 15:51:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 15:51:24,642 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 15:51:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 15:51:24,642 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 15:51:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:51:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 15:51:24,643 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 15:51:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 15:51:24,643 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 15:51:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:51:24,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:51:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 15:51:24,643 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 15:51:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 15:51:24,644 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 15:51:24,754 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:51:24,756 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:51:25,420 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:51:25,840 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:51:25,840 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-12-14 15:51:25,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:51:25 BoogieIcfgContainer [2022-12-14 15:51:25,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:51:25,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:51:25,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:51:25,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:51:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:51:24" (1/3) ... [2022-12-14 15:51:25,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e87c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:51:25, skipping insertion in model container [2022-12-14 15:51:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:51:24" (2/3) ... [2022-12-14 15:51:25,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e87c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:51:25, skipping insertion in model container [2022-12-14 15:51:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:51:25" (3/3) ... [2022-12-14 15:51:25,851 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2022-12-14 15:51:25,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:51:25,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 15:51:25,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:51:25,913 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;@68a936c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:51:25,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 15:51:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 266 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 214 states have internal predecessors, (319), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 15:51:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:51:25,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:51:25,926 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] [2022-12-14 15:51:25,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:51:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:51:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash -347554300, now seen corresponding path program 1 times [2022-12-14 15:51:25,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:51:25,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675206496] [2022-12-14 15:51:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:25,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:51:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:51:26,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:51:26,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675206496] [2022-12-14 15:51:26,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675206496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:51:26,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:51:26,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:51:26,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488621284] [2022-12-14 15:51:26,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:51:26,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:51:26,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:51:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:51:26,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:51:26,219 INFO L87 Difference]: Start difference. First operand has 266 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 214 states have internal predecessors, (319), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-12-14 15:51:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:51:26,602 INFO L93 Difference]: Finished difference Result 582 states and 877 transitions. [2022-12-14 15:51:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:51:26,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2022-12-14 15:51:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:51:26,615 INFO L225 Difference]: With dead ends: 582 [2022-12-14 15:51:26,615 INFO L226 Difference]: Without dead ends: 320 [2022-12-14 15:51:26,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:51:26,623 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 449 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:51:26,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 660 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:51:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-14 15:51:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 313. [2022-12-14 15:51:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 241 states have (on average 1.4605809128630705) internal successors, (352), 246 states have internal predecessors, (352), 50 states have call successors, (50), 22 states have call predecessors, (50), 20 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-12-14 15:51:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 448 transitions. [2022-12-14 15:51:26,687 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 448 transitions. Word has length 45 [2022-12-14 15:51:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:51:26,688 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 448 transitions. [2022-12-14 15:51:26,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-12-14 15:51:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 448 transitions. [2022-12-14 15:51:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:51:26,690 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:51:26,690 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] [2022-12-14 15:51:26,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:51:26,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:51:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:51:26,692 INFO L85 PathProgramCache]: Analyzing trace with hash 571420323, now seen corresponding path program 1 times [2022-12-14 15:51:26,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:51:26,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479702369] [2022-12-14 15:51:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:26,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:51:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:51:26,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:51:26,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479702369] [2022-12-14 15:51:26,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479702369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:51:26,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:51:26,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:51:26,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366274490] [2022-12-14 15:51:26,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:51:26,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:51:26,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:51:26,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:51:26,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:51:26,823 INFO L87 Difference]: Start difference. First operand 313 states and 448 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) [2022-12-14 15:51:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:51:27,357 INFO L93 Difference]: Finished difference Result 715 states and 951 transitions. [2022-12-14 15:51:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:51:27,358 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 [2022-12-14 15:51:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:51:27,362 INFO L225 Difference]: With dead ends: 715 [2022-12-14 15:51:27,362 INFO L226 Difference]: Without dead ends: 583 [2022-12-14 15:51:27,363 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 [2022-12-14 15:51:27,363 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 920 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:51:27,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 1165 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:51:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-12-14 15:51:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 499. [2022-12-14 15:51:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 373 states have (on average 1.3726541554959786) internal successors, (512), 379 states have internal predecessors, (512), 77 states have call successors, (77), 45 states have call predecessors, (77), 47 states have return successors, (77), 76 states have call predecessors, (77), 73 states have call successors, (77) [2022-12-14 15:51:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 666 transitions. [2022-12-14 15:51:27,395 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 666 transitions. Word has length 45 [2022-12-14 15:51:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:51:27,395 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 666 transitions. [2022-12-14 15:51:27,396 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) [2022-12-14 15:51:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 666 transitions. [2022-12-14 15:51:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 15:51:27,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:51:27,397 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] [2022-12-14 15:51:27,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:51:27,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:51:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:51:27,397 INFO L85 PathProgramCache]: Analyzing trace with hash -428329382, now seen corresponding path program 1 times [2022-12-14 15:51:27,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:51:27,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202374263] [2022-12-14 15:51:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:27,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:51:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:51:27,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:51:27,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202374263] [2022-12-14 15:51:27,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202374263] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:51:27,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:51:27,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:51:27,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64607859] [2022-12-14 15:51:27,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:51:27,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:51:27,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:51:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:51:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:51:27,564 INFO L87 Difference]: Start difference. First operand 499 states and 666 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) [2022-12-14 15:51:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:51:28,258 INFO L93 Difference]: Finished difference Result 1015 states and 1282 transitions. [2022-12-14 15:51:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:51:28,259 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 [2022-12-14 15:51:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:51:28,261 INFO L225 Difference]: With dead ends: 1015 [2022-12-14 15:51:28,262 INFO L226 Difference]: Without dead ends: 713 [2022-12-14 15:51:28,262 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 [2022-12-14 15:51:28,263 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 543 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:51:28,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 1144 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:51:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-12-14 15:51:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 678. [2022-12-14 15:51:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 498 states have (on average 1.3333333333333333) internal successors, (664), 505 states have internal predecessors, (664), 104 states have call successors, (104), 68 states have call predecessors, (104), 74 states have return successors, (108), 106 states have call predecessors, (108), 100 states have call successors, (108) [2022-12-14 15:51:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 876 transitions. [2022-12-14 15:51:28,299 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 876 transitions. Word has length 46 [2022-12-14 15:51:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:51:28,299 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 876 transitions. [2022-12-14 15:51:28,299 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) [2022-12-14 15:51:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 876 transitions. [2022-12-14 15:51:28,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:51:28,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:51:28,301 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] [2022-12-14 15:51:28,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:51:28,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:51:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:51:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash 289195388, now seen corresponding path program 1 times [2022-12-14 15:51:28,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:51:28,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137657901] [2022-12-14 15:51:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:28,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:51:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:51:28,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:51:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137657901] [2022-12-14 15:51:28,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137657901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:51:28,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:51:28,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:51:28,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181137288] [2022-12-14 15:51:28,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:51:28,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:51:28,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:51:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:51:28,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:51:28,339 INFO L87 Difference]: Start difference. First operand 678 states and 876 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) [2022-12-14 15:51:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:51:28,489 INFO L93 Difference]: Finished difference Result 1242 states and 1546 transitions. [2022-12-14 15:51:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:51:28,489 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 [2022-12-14 15:51:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:51:28,493 INFO L225 Difference]: With dead ends: 1242 [2022-12-14 15:51:28,493 INFO L226 Difference]: Without dead ends: 810 [2022-12-14 15:51:28,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:51:28,495 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 67 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:51:28,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 634 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:51:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-12-14 15:51:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 705. [2022-12-14 15:51:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 521 states have (on average 1.3224568138195778) internal successors, (689), 528 states have internal predecessors, (689), 106 states have call successors, (106), 70 states have call predecessors, (106), 76 states have return successors, (110), 108 states have call predecessors, (110), 102 states have call successors, (110) [2022-12-14 15:51:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 905 transitions. [2022-12-14 15:51:28,527 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 905 transitions. Word has length 47 [2022-12-14 15:51:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:51:28,527 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 905 transitions. [2022-12-14 15:51:28,528 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) [2022-12-14 15:51:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 905 transitions. [2022-12-14 15:51:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 15:51:28,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:51:28,529 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:51:28,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:51:28,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:51:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:51:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 792403974, now seen corresponding path program 1 times [2022-12-14 15:51:28,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:51:28,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170553781] [2022-12-14 15:51:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:28,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:51:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:51:28,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:51:28,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170553781] [2022-12-14 15:51:28,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170553781] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:51:28,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:51:28,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:51:28,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993259549] [2022-12-14 15:51:28,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:51:28,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:51:28,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:51:28,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:51:28,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:51:28,570 INFO L87 Difference]: Start difference. First operand 705 states and 905 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-14 15:51:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:51:28,695 INFO L93 Difference]: Finished difference Result 895 states and 1126 transitions. [2022-12-14 15:51:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:51:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 53 [2022-12-14 15:51:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:51:28,697 INFO L225 Difference]: With dead ends: 895 [2022-12-14 15:51:28,697 INFO L226 Difference]: Without dead ends: 622 [2022-12-14 15:51:28,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:51:28,699 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 354 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:51:28,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 395 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:51:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-12-14 15:51:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 513. [2022-12-14 15:51:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 381 states have (on average 1.330708661417323) internal successors, (507), 386 states have internal predecessors, (507), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 15:51:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 667 transitions. [2022-12-14 15:51:28,726 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 667 transitions. Word has length 53 [2022-12-14 15:51:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:51:28,726 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 667 transitions. [2022-12-14 15:51:28,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-14 15:51:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 667 transitions. [2022-12-14 15:51:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 15:51:28,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:51:28,728 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:51:28,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:51:28,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:51:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:51:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1488412024, now seen corresponding path program 1 times [2022-12-14 15:51:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:51:28,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960545878] [2022-12-14 15:51:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:28,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:51:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:51:28,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:51:28,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960545878] [2022-12-14 15:51:28,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960545878] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:51:28,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:51:28,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:51:28,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282489313] [2022-12-14 15:51:28,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:51:28,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:51:28,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:51:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:51:28,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:51:28,808 INFO L87 Difference]: Start difference. First operand 513 states and 667 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 15:51:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:51:29,066 INFO L93 Difference]: Finished difference Result 616 states and 783 transitions. [2022-12-14 15:51:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:51:29,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-12-14 15:51:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:51:29,071 INFO L225 Difference]: With dead ends: 616 [2022-12-14 15:51:29,071 INFO L226 Difference]: Without dead ends: 613 [2022-12-14 15:51:29,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:51:29,072 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 641 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:51:29,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 371 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:51:29,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-12-14 15:51:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 512. [2022-12-14 15:51:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 381 states have (on average 1.3228346456692914) internal successors, (504), 385 states have internal predecessors, (504), 81 states have call successors, (81), 50 states have call predecessors, (81), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 15:51:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 663 transitions. [2022-12-14 15:51:29,105 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 663 transitions. Word has length 54 [2022-12-14 15:51:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:51:29,105 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 663 transitions. [2022-12-14 15:51:29,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 15:51:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 663 transitions. [2022-12-14 15:51:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 15:51:29,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:51:29,106 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:51:29,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:51:29,107 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:51:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:51:29,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1105329051, now seen corresponding path program 1 times [2022-12-14 15:51:29,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:51:29,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798453931] [2022-12-14 15:51:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:29,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:51:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:51:29,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:51:29,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798453931] [2022-12-14 15:51:29,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798453931] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:51:29,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506891793] [2022-12-14 15:51:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:29,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:51:29,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:51:29,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:51:29,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:51:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:51:29,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:51:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:51:29,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:51:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:51:29,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506891793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:51:29,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545259639] [2022-12-14 15:51:29,672 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 15:51:29,672 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:51:29,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:51:29,679 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:51:29,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:51:34,492 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-12-14 15:51:34,520 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 201 for LOIs [2022-12-14 15:51:34,546 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-12-14 15:51:35,123 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-12-14 15:51:35,195 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-12-14 15:51:35,267 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-12-14 15:51:35,294 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-12-14 15:51:35,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:51:54,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1545259639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:51:54,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:51:54,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-12-14 15:51:54,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500279923] [2022-12-14 15:51:54,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:51:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 15:51:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:51:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 15:51:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 15:51:54,259 INFO L87 Difference]: Start difference. First operand 512 states and 663 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 15:52:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:21,725 INFO L93 Difference]: Finished difference Result 876 states and 1074 transitions. [2022-12-14 15:52:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 15:52:21,725 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-12-14 15:52:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:21,727 INFO L225 Difference]: With dead ends: 876 [2022-12-14 15:52:21,727 INFO L226 Difference]: Without dead ends: 561 [2022-12-14 15:52:21,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 15:52:21,729 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 190 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 6580 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 3069 SdHoareTripleChecker+Invalid, 6754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 6580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:21,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 3069 Invalid, 6754 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [174 Valid, 6580 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-12-14 15:52:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-12-14 15:52:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 546. [2022-12-14 15:52:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 407 states have (on average 1.307125307125307) internal successors, (532), 411 states have internal predecessors, (532), 83 states have call successors, (83), 56 states have call predecessors, (83), 54 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-12-14 15:52:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 695 transitions. [2022-12-14 15:52:21,796 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 695 transitions. Word has length 55 [2022-12-14 15:52:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:21,797 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 695 transitions. [2022-12-14 15:52:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 15:52:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 695 transitions. [2022-12-14 15:52:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 15:52:21,798 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:21,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:52:21,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:52:21,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:21,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:21,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1208803338, now seen corresponding path program 1 times [2022-12-14 15:52:22,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:22,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623188498] [2022-12-14 15:52:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:22,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:52:22,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:22,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623188498] [2022-12-14 15:52:22,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623188498] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:22,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:52:22,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:52:22,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304411344] [2022-12-14 15:52:22,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:22,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:52:22,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:22,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:52:22,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:52:22,063 INFO L87 Difference]: Start difference. First operand 546 states and 695 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:52:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:22,277 INFO L93 Difference]: Finished difference Result 827 states and 1017 transitions. [2022-12-14 15:52:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:52:22,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-12-14 15:52:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:22,281 INFO L225 Difference]: With dead ends: 827 [2022-12-14 15:52:22,281 INFO L226 Difference]: Without dead ends: 658 [2022-12-14 15:52:22,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:52:22,282 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 42 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:22,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 673 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:52:22,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-12-14 15:52:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 581. [2022-12-14 15:52:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 436 states have (on average 1.3027522935779816) internal successors, (568), 440 states have internal predecessors, (568), 86 states have call successors, (86), 59 states have call predecessors, (86), 57 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-12-14 15:52:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 737 transitions. [2022-12-14 15:52:22,352 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 737 transitions. Word has length 61 [2022-12-14 15:52:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:22,353 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 737 transitions. [2022-12-14 15:52:22,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:52:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 737 transitions. [2022-12-14 15:52:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 15:52:22,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:22,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:52:22,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:52:22,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:22,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:22,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1647978870, now seen corresponding path program 1 times [2022-12-14 15:52:22,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:22,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064755518] [2022-12-14 15:52:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:22,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:52:22,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:22,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064755518] [2022-12-14 15:52:22,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064755518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:22,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:52:22,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:52:22,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273951874] [2022-12-14 15:52:22,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:22,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:52:22,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:22,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:52:22,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:52:22,461 INFO L87 Difference]: Start difference. First operand 581 states and 737 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:52:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:23,114 INFO L93 Difference]: Finished difference Result 1044 states and 1263 transitions. [2022-12-14 15:52:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:52:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-12-14 15:52:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:23,119 INFO L225 Difference]: With dead ends: 1044 [2022-12-14 15:52:23,119 INFO L226 Difference]: Without dead ends: 741 [2022-12-14 15:52:23,120 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 [2022-12-14 15:52:23,120 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 527 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:23,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1104 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:52:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-12-14 15:52:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 720. [2022-12-14 15:52:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 530 states have (on average 1.2660377358490567) internal successors, (671), 534 states have internal predecessors, (671), 110 states have call successors, (110), 80 states have call predecessors, (110), 78 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2022-12-14 15:52:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 888 transitions. [2022-12-14 15:52:23,197 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 888 transitions. Word has length 63 [2022-12-14 15:52:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:23,197 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 888 transitions. [2022-12-14 15:52:23,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:52:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 888 transitions. [2022-12-14 15:52:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 15:52:23,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:23,198 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:52:23,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:52:23,198 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:23,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:23,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1160430927, now seen corresponding path program 1 times [2022-12-14 15:52:23,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:23,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310778283] [2022-12-14 15:52:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:23,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:52:23,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:23,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310778283] [2022-12-14 15:52:23,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310778283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:52:23,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756358354] [2022-12-14 15:52:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:23,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:52:23,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:52:23,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:52:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:23,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:52:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:52:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:52:23,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:52:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:52:23,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756358354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:52:23,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2066097551] [2022-12-14 15:52:23,649 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 15:52:23,650 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:52:23,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:52:23,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:52:23,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:52:37,742 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-12-14 15:52:37,769 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 171 for LOIs [2022-12-14 15:52:37,783 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 324 for LOIs [2022-12-14 15:52:37,923 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-12-14 15:52:38,473 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-12-14 15:52:38,544 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-12-14 15:52:38,615 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-12-14 15:52:38,641 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-12-14 15:52:38,669 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:53:05,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19901#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 15:53:05,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:53:05,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:53:05,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 15:53:05,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503954015] [2022-12-14 15:53:05,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:53:05,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:53:05,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:53:05,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 15:53:05,699 INFO L87 Difference]: Start difference. First operand 720 states and 888 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-12-14 15:53:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:06,236 INFO L93 Difference]: Finished difference Result 1814 states and 2129 transitions. [2022-12-14 15:53:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:53:06,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-12-14 15:53:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:06,241 INFO L225 Difference]: With dead ends: 1814 [2022-12-14 15:53:06,241 INFO L226 Difference]: Without dead ends: 1811 [2022-12-14 15:53:06,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 15:53:06,242 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 839 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:06,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1347 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:53:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-12-14 15:53:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1234. [2022-12-14 15:53:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 886 states have (on average 1.2302483069977426) internal successors, (1090), 890 states have internal predecessors, (1090), 194 states have call successors, (194), 154 states have call predecessors, (194), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-12-14 15:53:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1475 transitions. [2022-12-14 15:53:06,378 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1475 transitions. Word has length 64 [2022-12-14 15:53:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:06,378 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1475 transitions. [2022-12-14 15:53:06,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-12-14 15:53:06,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1475 transitions. [2022-12-14 15:53:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 15:53:06,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:06,379 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:53:06,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:53:06,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 15:53:06,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash -708849346, now seen corresponding path program 2 times [2022-12-14 15:53:06,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:06,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125493669] [2022-12-14 15:53:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:06,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:53:06,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:06,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125493669] [2022-12-14 15:53:06,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125493669] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:06,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:53:06,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:53:06,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735731037] [2022-12-14 15:53:06,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:06,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:53:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:53:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:53:06,607 INFO L87 Difference]: Start difference. First operand 1234 states and 1475 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:53:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:06,823 INFO L93 Difference]: Finished difference Result 1986 states and 2331 transitions. [2022-12-14 15:53:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:53:06,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-12-14 15:53:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:06,828 INFO L225 Difference]: With dead ends: 1986 [2022-12-14 15:53:06,828 INFO L226 Difference]: Without dead ends: 1230 [2022-12-14 15:53:06,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:53:06,830 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 357 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:06,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 428 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:53:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-12-14 15:53:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1219. [2022-12-14 15:53:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 871 states have (on average 1.2169919632606199) internal successors, (1060), 875 states have internal predecessors, (1060), 194 states have call successors, (194), 154 states have call predecessors, (194), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-12-14 15:53:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1445 transitions. [2022-12-14 15:53:06,977 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1445 transitions. Word has length 67 [2022-12-14 15:53:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:06,978 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1445 transitions. [2022-12-14 15:53:06,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:53:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1445 transitions. [2022-12-14 15:53:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 15:53:06,979 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:06,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:53:06,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 15:53:06,979 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash 346637140, now seen corresponding path program 1 times [2022-12-14 15:53:06,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:06,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128829271] [2022-12-14 15:53:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:53:07,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:07,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128829271] [2022-12-14 15:53:07,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128829271] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:07,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:53:07,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:53:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809448055] [2022-12-14 15:53:07,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:07,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:53:07,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:53:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:53:07,062 INFO L87 Difference]: Start difference. First operand 1219 states and 1445 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:53:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:07,826 INFO L93 Difference]: Finished difference Result 2107 states and 2920 transitions. [2022-12-14 15:53:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:53:07,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2022-12-14 15:53:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:07,836 INFO L225 Difference]: With dead ends: 2107 [2022-12-14 15:53:07,836 INFO L226 Difference]: Without dead ends: 1921 [2022-12-14 15:53:07,837 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 [2022-12-14 15:53:07,837 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1459 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:07,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 1487 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:53:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-12-14 15:53:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1908. [2022-12-14 15:53:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1451 states have (on average 1.3425223983459682) internal successors, (1948), 1458 states have internal predecessors, (1948), 279 states have call successors, (279), 178 states have call predecessors, (279), 176 states have return successors, (338), 273 states have call predecessors, (338), 276 states have call successors, (338) [2022-12-14 15:53:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2565 transitions. [2022-12-14 15:53:08,008 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2565 transitions. Word has length 68 [2022-12-14 15:53:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:08,008 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2565 transitions. [2022-12-14 15:53:08,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:53:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2565 transitions. [2022-12-14 15:53:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 15:53:08,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:08,009 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:53:08,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 15:53:08,010 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:08,010 INFO L85 PathProgramCache]: Analyzing trace with hash -178799852, now seen corresponding path program 1 times [2022-12-14 15:53:08,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:08,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269418072] [2022-12-14 15:53:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:08,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:53:08,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269418072] [2022-12-14 15:53:08,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269418072] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:08,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:53:08,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:53:08,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803628491] [2022-12-14 15:53:08,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:08,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:53:08,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:53:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:53:08,049 INFO L87 Difference]: Start difference. First operand 1908 states and 2565 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:53:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:08,366 INFO L93 Difference]: Finished difference Result 2874 states and 3659 transitions. [2022-12-14 15:53:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:53:08,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-12-14 15:53:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:08,374 INFO L225 Difference]: With dead ends: 2874 [2022-12-14 15:53:08,375 INFO L226 Difference]: Without dead ends: 2084 [2022-12-14 15:53:08,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:53:08,376 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 37 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:08,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 664 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:53:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2022-12-14 15:53:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1955. [2022-12-14 15:53:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1490 states have (on average 1.338255033557047) internal successors, (1994), 1497 states have internal predecessors, (1994), 283 states have call successors, (283), 182 states have call predecessors, (283), 180 states have return successors, (342), 277 states have call predecessors, (342), 280 states have call successors, (342) [2022-12-14 15:53:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2619 transitions. [2022-12-14 15:53:08,558 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2619 transitions. Word has length 71 [2022-12-14 15:53:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:08,558 INFO L495 AbstractCegarLoop]: Abstraction has 1955 states and 2619 transitions. [2022-12-14 15:53:08,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:53:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2619 transitions. [2022-12-14 15:53:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 15:53:08,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:08,559 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:53:08,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 15:53:08,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1276051040, now seen corresponding path program 1 times [2022-12-14 15:53:08,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:08,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567430111] [2022-12-14 15:53:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:08,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 15:53:08,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:08,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567430111] [2022-12-14 15:53:08,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567430111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:53:08,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847871820] [2022-12-14 15:53:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:08,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:53:08,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:53:08,777 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:53:08,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:53:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:08,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:53:08,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:53:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:53:08,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:53:08,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847871820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:08,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:53:08,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-14 15:53:08,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725657612] [2022-12-14 15:53:08,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:08,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:53:08,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:08,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:53:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:53:08,921 INFO L87 Difference]: Start difference. First operand 1955 states and 2619 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 15:53:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:09,432 INFO L93 Difference]: Finished difference Result 2817 states and 3623 transitions. [2022-12-14 15:53:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:53:09,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-12-14 15:53:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:09,437 INFO L225 Difference]: With dead ends: 2817 [2022-12-14 15:53:09,438 INFO L226 Difference]: Without dead ends: 1770 [2022-12-14 15:53:09,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:53:09,440 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 351 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:09,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1371 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:53:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-12-14 15:53:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1585. [2022-12-14 15:53:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1252 states have (on average 1.3761980830670926) internal successors, (1723), 1259 states have internal predecessors, (1723), 212 states have call successors, (212), 121 states have call predecessors, (212), 119 states have return successors, (271), 206 states have call predecessors, (271), 209 states have call successors, (271) [2022-12-14 15:53:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2206 transitions. [2022-12-14 15:53:09,596 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2206 transitions. Word has length 102 [2022-12-14 15:53:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:09,596 INFO L495 AbstractCegarLoop]: Abstraction has 1585 states and 2206 transitions. [2022-12-14 15:53:09,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 15:53:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2206 transitions. [2022-12-14 15:53:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 15:53:09,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:09,598 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:53:09,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:53:09,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:53:09,799 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:09,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash -535850802, now seen corresponding path program 1 times [2022-12-14 15:53:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:09,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125516639] [2022-12-14 15:53:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:09,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 15:53:09,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125516639] [2022-12-14 15:53:09,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125516639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:53:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684679093] [2022-12-14 15:53:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:09,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:53:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:53:09,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:53:09,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:53:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:10,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:53:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:53:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:53:10,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:53:10,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684679093] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:10,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:53:10,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 15:53:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529696313] [2022-12-14 15:53:10,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:10,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:53:10,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:10,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:53:10,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:53:10,113 INFO L87 Difference]: Start difference. First operand 1585 states and 2206 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 15:53:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:10,545 INFO L93 Difference]: Finished difference Result 2134 states and 2831 transitions. [2022-12-14 15:53:10,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:53:10,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-12-14 15:53:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:10,549 INFO L225 Difference]: With dead ends: 2134 [2022-12-14 15:53:10,549 INFO L226 Difference]: Without dead ends: 1541 [2022-12-14 15:53:10,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:53:10,551 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 63 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:10,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 2059 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:53:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-12-14 15:53:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1449. [2022-12-14 15:53:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1152 states have (on average 1.3940972222222223) internal successors, (1606), 1159 states have internal predecessors, (1606), 193 states have call successors, (193), 104 states have call predecessors, (193), 102 states have return successors, (252), 187 states have call predecessors, (252), 190 states have call successors, (252) [2022-12-14 15:53:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2051 transitions. [2022-12-14 15:53:10,690 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2051 transitions. Word has length 112 [2022-12-14 15:53:10,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:10,690 INFO L495 AbstractCegarLoop]: Abstraction has 1449 states and 2051 transitions. [2022-12-14 15:53:10,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 15:53:10,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2051 transitions. [2022-12-14 15:53:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 15:53:10,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:10,691 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:53:10,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 15:53:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:53:10,893 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:10,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:10,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1157251084, now seen corresponding path program 1 times [2022-12-14 15:53:10,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:10,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105795179] [2022-12-14 15:53:10,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:10,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 15:53:10,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:10,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105795179] [2022-12-14 15:53:10,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105795179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:53:10,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736398298] [2022-12-14 15:53:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:10,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:53:10,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:53:10,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:53:11,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:53:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:11,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:53:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:53:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 15:53:11,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:53:11,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736398298] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:11,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:53:11,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-12-14 15:53:11,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470824524] [2022-12-14 15:53:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:53:11,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:53:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:53:11,153 INFO L87 Difference]: Start difference. First operand 1449 states and 2051 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:53:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:11,471 INFO L93 Difference]: Finished difference Result 2198 states and 2896 transitions. [2022-12-14 15:53:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:53:11,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-12-14 15:53:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:11,477 INFO L225 Difference]: With dead ends: 2198 [2022-12-14 15:53:11,477 INFO L226 Difference]: Without dead ends: 1741 [2022-12-14 15:53:11,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:53:11,478 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 337 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:11,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 1478 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:53:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-12-14 15:53:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1707. [2022-12-14 15:53:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1314 states have (on average 1.3592085235920852) internal successors, (1786), 1327 states have internal predecessors, (1786), 241 states have call successors, (241), 146 states have call predecessors, (241), 150 states have return successors, (312), 235 states have call predecessors, (312), 238 states have call successors, (312) [2022-12-14 15:53:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2339 transitions. [2022-12-14 15:53:11,675 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2339 transitions. Word has length 113 [2022-12-14 15:53:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:11,675 INFO L495 AbstractCegarLoop]: Abstraction has 1707 states and 2339 transitions. [2022-12-14 15:53:11,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:53:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2339 transitions. [2022-12-14 15:53:11,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 15:53:11,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:11,676 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:53:11,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:53:11,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 15:53:11,878 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1447795304, now seen corresponding path program 1 times [2022-12-14 15:53:11,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:11,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544899760] [2022-12-14 15:53:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:11,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 15:53:12,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544899760] [2022-12-14 15:53:12,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544899760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:53:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015076118] [2022-12-14 15:53:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:53:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:53:12,450 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:53:12,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:53:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 15:53:12,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:53:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:53:13,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:53:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 15:53:14,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015076118] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:53:14,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741667660] [2022-12-14 15:53:14,264 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 15:53:14,264 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:53:14,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:53:14,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:53:14,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:54:29,559 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 384 for LOIs [2022-12-14 15:54:30,346 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 336 for LOIs [2022-12-14 15:54:30,482 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 329 for LOIs [2022-12-14 15:54:30,623 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 396 for LOIs [2022-12-14 15:54:34,477 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 224 for LOIs [2022-12-14 15:54:34,974 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 173 for LOIs [2022-12-14 15:54:35,487 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 388 for LOIs [2022-12-14 15:54:36,584 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 411 for LOIs [2022-12-14 15:54:37,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:55:55,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60626#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (<= ~t12_i~0 0) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-12-14 15:55:55,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:55:55,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:55:55,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-12-14 15:55:55,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779085748] [2022-12-14 15:55:55,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:55:55,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 15:55:55,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:55:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 15:55:55,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=10337, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 15:55:55,855 INFO L87 Difference]: Start difference. First operand 1707 states and 2339 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-12-14 15:56:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:15,553 INFO L93 Difference]: Finished difference Result 4218 states and 5255 transitions. [2022-12-14 15:56:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-12-14 15:56:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-12-14 15:56:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:15,561 INFO L225 Difference]: With dead ends: 4218 [2022-12-14 15:56:15,561 INFO L226 Difference]: Without dead ends: 3503 [2022-12-14 15:56:15,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 286 SyntacticMatches, 8 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44323 ImplicationChecksByTransitivity, 93.6s TimeCoverageRelationStatistics Valid=10080, Invalid=98490, Unknown=0, NotChecked=0, Total=108570 [2022-12-14 15:56:15,575 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 5894 mSDsluCounter, 3459 mSDsCounter, 0 mSdLazyCounter, 8252 mSolverCounterSat, 2963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5896 SdHoareTripleChecker+Valid, 3725 SdHoareTripleChecker+Invalid, 11215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2963 IncrementalHoareTripleChecker+Valid, 8252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:15,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5896 Valid, 3725 Invalid, 11215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2963 Valid, 8252 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 15:56:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2022-12-14 15:56:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 1983. [2022-12-14 15:56:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1498 states have (on average 1.3331108144192256) internal successors, (1997), 1513 states have internal predecessors, (1997), 286 states have call successors, (286), 183 states have call predecessors, (286), 197 states have return successors, (369), 288 states have call predecessors, (369), 283 states have call successors, (369) [2022-12-14 15:56:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 2652 transitions. [2022-12-14 15:56:15,841 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 2652 transitions. Word has length 114 [2022-12-14 15:56:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:15,841 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 2652 transitions. [2022-12-14 15:56:15,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-12-14 15:56:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 2652 transitions. [2022-12-14 15:56:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 15:56:15,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:15,844 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:15,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:16,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 15:56:16,046 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1376256587, now seen corresponding path program 1 times [2022-12-14 15:56:16,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:16,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861160449] [2022-12-14 15:56:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:16,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:56:16,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:16,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861160449] [2022-12-14 15:56:16,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861160449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:16,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210767569] [2022-12-14 15:56:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:16,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:16,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:16,263 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:16,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:56:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:16,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:56:16,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 15:56:16,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 15:56:16,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210767569] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:16,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:56:16,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-12-14 15:56:16,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251403148] [2022-12-14 15:56:16,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:16,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:56:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:16,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:56:16,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:56:16,557 INFO L87 Difference]: Start difference. First operand 1983 states and 2652 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 15:56:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:17,364 INFO L93 Difference]: Finished difference Result 3307 states and 4200 transitions. [2022-12-14 15:56:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:56:17,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-12-14 15:56:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:17,370 INFO L225 Difference]: With dead ends: 3307 [2022-12-14 15:56:17,370 INFO L226 Difference]: Without dead ends: 2316 [2022-12-14 15:56:17,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-14 15:56:17,371 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 535 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:17,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 607 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:56:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-12-14 15:56:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2063. [2022-12-14 15:56:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 1543 states have (on average 1.3272845106934543) internal successors, (2048), 1561 states have internal predecessors, (2048), 305 states have call successors, (305), 192 states have call predecessors, (305), 213 states have return successors, (409), 311 states have call predecessors, (409), 302 states have call successors, (409) [2022-12-14 15:56:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2762 transitions. [2022-12-14 15:56:17,672 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2762 transitions. Word has length 115 [2022-12-14 15:56:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:17,672 INFO L495 AbstractCegarLoop]: Abstraction has 2063 states and 2762 transitions. [2022-12-14 15:56:17,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 15:56:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2762 transitions. [2022-12-14 15:56:17,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 15:56:17,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:17,674 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:17,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:17,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 15:56:17,875 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2049472915, now seen corresponding path program 1 times [2022-12-14 15:56:17,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:17,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561999792] [2022-12-14 15:56:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:17,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:56:18,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:18,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561999792] [2022-12-14 15:56:18,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561999792] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:18,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670168529] [2022-12-14 15:56:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:18,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:18,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:18,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:56:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:18,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 15:56:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:56:19,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:56:20,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670168529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:20,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [483720054] [2022-12-14 15:56:20,336 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 15:56:20,337 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:56:20,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:56:20,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:56:20,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:56:43,479 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 372 for LOIs [2022-12-14 15:56:44,453 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 321 for LOIs [2022-12-14 15:56:44,576 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 319 for LOIs [2022-12-14 15:56:44,714 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 384 for LOIs [2022-12-14 15:56:48,359 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 212 for LOIs [2022-12-14 15:56:48,824 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 160 for LOIs [2022-12-14 15:56:49,277 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 376 for LOIs [2022-12-14 15:56:50,221 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 399 for LOIs [2022-12-14 15:56:51,035 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:58:00,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '79434#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t11_i~0) (= 0 ~t2_st~0) (<= 2 ~T12_E~0) (<= 2 ~E_5~0) (= ~t12_st~0 0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (= ~t11_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (<= ~t11_i~0 0) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-12-14 15:58:00,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:58:00,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:58:00,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-12-14 15:58:00,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781014193] [2022-12-14 15:58:00,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:58:00,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 15:58:00,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 15:58:00,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=11697, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 15:58:00,290 INFO L87 Difference]: Start difference. First operand 2063 states and 2762 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-12-14 15:58:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:14,441 INFO L93 Difference]: Finished difference Result 4347 states and 5464 transitions. [2022-12-14 15:58:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 15:58:14,442 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-12-14 15:58:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:14,451 INFO L225 Difference]: With dead ends: 4347 [2022-12-14 15:58:14,451 INFO L226 Difference]: Without dead ends: 3276 [2022-12-14 15:58:14,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 316 SyntacticMatches, 6 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27404 ImplicationChecksByTransitivity, 78.0s TimeCoverageRelationStatistics Valid=6757, Invalid=62675, Unknown=0, NotChecked=0, Total=69432 [2022-12-14 15:58:14,456 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 5506 mSDsluCounter, 3861 mSDsCounter, 0 mSdLazyCounter, 10821 mSolverCounterSat, 3684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5506 SdHoareTripleChecker+Valid, 4120 SdHoareTripleChecker+Invalid, 14505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3684 IncrementalHoareTripleChecker+Valid, 10821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:14,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5506 Valid, 4120 Invalid, 14505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3684 Valid, 10821 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 15:58:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2022-12-14 15:58:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 1879. [2022-12-14 15:58:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1431 states have (on average 1.3417190775681342) internal successors, (1920), 1448 states have internal predecessors, (1920), 265 states have call successors, (265), 160 states have call predecessors, (265), 181 states have return successors, (359), 272 states have call predecessors, (359), 262 states have call successors, (359) [2022-12-14 15:58:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 2544 transitions. [2022-12-14 15:58:14,756 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 2544 transitions. Word has length 124 [2022-12-14 15:58:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:14,756 INFO L495 AbstractCegarLoop]: Abstraction has 1879 states and 2544 transitions. [2022-12-14 15:58:14,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-12-14 15:58:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 2544 transitions. [2022-12-14 15:58:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 15:58:14,758 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:14,758 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:14,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:58:14,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:14,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash -231451290, now seen corresponding path program 1 times [2022-12-14 15:58:14,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:14,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886063694] [2022-12-14 15:58:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:14,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 15:58:15,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886063694] [2022-12-14 15:58:15,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886063694] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767911995] [2022-12-14 15:58:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:15,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:15,082 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:15,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:58:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:58:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 15:58:15,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:58:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 15:58:15,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767911995] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:15,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:58:15,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-12-14 15:58:15,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980612431] [2022-12-14 15:58:15,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:15,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:58:15,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:58:15,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:58:15,383 INFO L87 Difference]: Start difference. First operand 1879 states and 2544 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 15:58:16,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:16,293 INFO L93 Difference]: Finished difference Result 2534 states and 3285 transitions. [2022-12-14 15:58:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 15:58:16,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-12-14 15:58:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:16,298 INFO L225 Difference]: With dead ends: 2534 [2022-12-14 15:58:16,298 INFO L226 Difference]: Without dead ends: 1647 [2022-12-14 15:58:16,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-12-14 15:58:16,299 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 810 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:16,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 576 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:58:16,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-12-14 15:58:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1610. [2022-12-14 15:58:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1232 states have (on average 1.359577922077922) internal successors, (1675), 1249 states have internal predecessors, (1675), 229 states have call successors, (229), 130 states have call predecessors, (229), 147 states have return successors, (318), 232 states have call predecessors, (318), 226 states have call successors, (318) [2022-12-14 15:58:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2222 transitions. [2022-12-14 15:58:16,541 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2222 transitions. Word has length 125 [2022-12-14 15:58:16,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:16,541 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 2222 transitions. [2022-12-14 15:58:16,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 15:58:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2222 transitions. [2022-12-14 15:58:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 15:58:16,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:16,543 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:16,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:58:16,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:16,744 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash 582096654, now seen corresponding path program 1 times [2022-12-14 15:58:16,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:16,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2500952] [2022-12-14 15:58:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:16,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:58:16,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:16,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2500952] [2022-12-14 15:58:16,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2500952] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:16,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513047799] [2022-12-14 15:58:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:16,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:16,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:16,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:16,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:58:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:16,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:58:16,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:58:17,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:58:17,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513047799] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:17,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:58:17,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:58:17,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869494031] [2022-12-14 15:58:17,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:17,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:58:17,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:58:17,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:17,034 INFO L87 Difference]: Start difference. First operand 1610 states and 2222 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:17,448 INFO L93 Difference]: Finished difference Result 3344 states and 5134 transitions. [2022-12-14 15:58:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:58:17,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 15:58:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:17,454 INFO L225 Difference]: With dead ends: 3344 [2022-12-14 15:58:17,454 INFO L226 Difference]: Without dead ends: 2469 [2022-12-14 15:58:17,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:17,456 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 329 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:17,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 572 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:58:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-12-14 15:58:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2460. [2022-12-14 15:58:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1950 states have (on average 1.4205128205128206) internal successors, (2770), 1970 states have internal predecessors, (2770), 331 states have call successors, (331), 160 states have call predecessors, (331), 177 states have return successors, (478), 331 states have call predecessors, (478), 328 states have call successors, (478) [2022-12-14 15:58:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3579 transitions. [2022-12-14 15:58:17,787 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3579 transitions. Word has length 137 [2022-12-14 15:58:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:17,787 INFO L495 AbstractCegarLoop]: Abstraction has 2460 states and 3579 transitions. [2022-12-14 15:58:17,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3579 transitions. [2022-12-14 15:58:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 15:58:17,790 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:17,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:17,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:58:17,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:17,990 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -65534994, now seen corresponding path program 1 times [2022-12-14 15:58:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:17,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948580386] [2022-12-14 15:58:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:17,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:58:18,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:18,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948580386] [2022-12-14 15:58:18,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948580386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:18,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136989586] [2022-12-14 15:58:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:18,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:18,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:18,059 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:18,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:58:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:18,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:58:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 15:58:18,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:58:18,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136989586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:18,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:58:18,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:58:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199247358] [2022-12-14 15:58:18,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:18,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:58:18,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:18,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:58:18,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:18,216 INFO L87 Difference]: Start difference. First operand 2460 states and 3579 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:18,964 INFO L93 Difference]: Finished difference Result 5879 states and 9297 transitions. [2022-12-14 15:58:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:58:18,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 15:58:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:18,973 INFO L225 Difference]: With dead ends: 5879 [2022-12-14 15:58:18,973 INFO L226 Difference]: Without dead ends: 4154 [2022-12-14 15:58:18,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:18,978 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 353 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:18,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 569 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:58:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2022-12-14 15:58:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 4140. [2022-12-14 15:58:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3371 states have (on average 1.4624740433105903) internal successors, (4930), 3397 states have internal predecessors, (4930), 530 states have call successors, (530), 220 states have call predecessors, (530), 237 states have return successors, (789), 524 states have call predecessors, (789), 527 states have call successors, (789) [2022-12-14 15:58:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6249 transitions. [2022-12-14 15:58:19,461 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6249 transitions. Word has length 137 [2022-12-14 15:58:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:19,461 INFO L495 AbstractCegarLoop]: Abstraction has 4140 states and 6249 transitions. [2022-12-14 15:58:19,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6249 transitions. [2022-12-14 15:58:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 15:58:19,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:19,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:19,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:58:19,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:19,666 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:19,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1740460238, now seen corresponding path program 1 times [2022-12-14 15:58:19,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:19,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209635817] [2022-12-14 15:58:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:19,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:58:19,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:19,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209635817] [2022-12-14 15:58:19,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209635817] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:19,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382474659] [2022-12-14 15:58:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:19,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:19,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:19,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:19,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:58:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:58:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 15:58:20,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:58:20,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382474659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:20,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:58:20,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:58:20,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556301190] [2022-12-14 15:58:20,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:20,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:58:20,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:58:20,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:20,024 INFO L87 Difference]: Start difference. First operand 4140 states and 6249 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:21,069 INFO L93 Difference]: Finished difference Result 10889 states and 17482 transitions. [2022-12-14 15:58:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:58:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 15:58:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:21,093 INFO L225 Difference]: With dead ends: 10889 [2022-12-14 15:58:21,093 INFO L226 Difference]: Without dead ends: 7484 [2022-12-14 15:58:21,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:21,111 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 344 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:21,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 569 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:58:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2022-12-14 15:58:22,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 7460. [2022-12-14 15:58:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 6183 states have (on average 1.4863334950671194) internal successors, (9190), 6221 states have internal predecessors, (9190), 918 states have call successors, (918), 340 states have call predecessors, (918), 357 states have return successors, (1393), 900 states have call predecessors, (1393), 915 states have call successors, (1393) [2022-12-14 15:58:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 11501 transitions. [2022-12-14 15:58:22,043 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 11501 transitions. Word has length 137 [2022-12-14 15:58:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:22,043 INFO L495 AbstractCegarLoop]: Abstraction has 7460 states and 11501 transitions. [2022-12-14 15:58:22,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 11501 transitions. [2022-12-14 15:58:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 15:58:22,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:22,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:22,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:58:22,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 15:58:22,249 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash -807139346, now seen corresponding path program 1 times [2022-12-14 15:58:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:22,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177245268] [2022-12-14 15:58:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:22,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:58:22,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:22,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177245268] [2022-12-14 15:58:22,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177245268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:22,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672951924] [2022-12-14 15:58:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:22,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:22,319 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:22,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:58:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:22,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:58:22,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 15:58:22,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:58:22,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672951924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:22,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:58:22,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:58:22,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766888596] [2022-12-14 15:58:22,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:22,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:58:22,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:22,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:58:22,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:22,527 INFO L87 Difference]: Start difference. First operand 7460 states and 11501 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:24,390 INFO L93 Difference]: Finished difference Result 20789 states and 33570 transitions. [2022-12-14 15:58:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:58:24,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 15:58:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:24,453 INFO L225 Difference]: With dead ends: 20789 [2022-12-14 15:58:24,453 INFO L226 Difference]: Without dead ends: 14064 [2022-12-14 15:58:24,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:24,489 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 350 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:24,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 572 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:58:24,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14064 states. [2022-12-14 15:58:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14064 to 14020. [2022-12-14 15:58:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 11747 states have (on average 1.4974035924065718) internal successors, (17590), 11809 states have internal predecessors, (17590), 1674 states have call successors, (1674), 580 states have call predecessors, (1674), 597 states have return successors, (2565), 1632 states have call predecessors, (2565), 1671 states have call successors, (2565) [2022-12-14 15:58:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 21829 transitions. [2022-12-14 15:58:26,159 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 21829 transitions. Word has length 137 [2022-12-14 15:58:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:26,159 INFO L495 AbstractCegarLoop]: Abstraction has 14020 states and 21829 transitions. [2022-12-14 15:58:26,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 21829 transitions. [2022-12-14 15:58:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 15:58:26,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:26,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:26,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:58:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 15:58:26,371 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash 883746574, now seen corresponding path program 1 times [2022-12-14 15:58:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:26,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572350613] [2022-12-14 15:58:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:26,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:58:26,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:26,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572350613] [2022-12-14 15:58:26,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572350613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:26,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12325170] [2022-12-14 15:58:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:26,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:26,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:26,441 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:26,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:58:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:26,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:58:26,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:58:26,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:58:26,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12325170] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:26,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:58:26,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:58:26,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665322536] [2022-12-14 15:58:26,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:26,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:58:26,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:26,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:58:26,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:26,659 INFO L87 Difference]: Start difference. First operand 14020 states and 21829 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:30,373 INFO L93 Difference]: Finished difference Result 40349 states and 65182 transitions. [2022-12-14 15:58:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:58:30,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 15:58:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:30,459 INFO L225 Difference]: With dead ends: 40349 [2022-12-14 15:58:30,459 INFO L226 Difference]: Without dead ends: 27064 [2022-12-14 15:58:30,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:30,499 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 332 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:30,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 569 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:58:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27064 states. [2022-12-14 15:58:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27064 to 26980. [2022-12-14 15:58:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26980 states, 22755 states have (on average 1.5007690617446714) internal successors, (34150), 22865 states have internal predecessors, (34150), 3146 states have call successors, (3146), 1060 states have call predecessors, (3146), 1077 states have return successors, (4837), 3056 states have call predecessors, (4837), 3143 states have call successors, (4837) [2022-12-14 15:58:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26980 states to 26980 states and 42133 transitions. [2022-12-14 15:58:34,240 INFO L78 Accepts]: Start accepts. Automaton has 26980 states and 42133 transitions. Word has length 137 [2022-12-14 15:58:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:34,240 INFO L495 AbstractCegarLoop]: Abstraction has 26980 states and 42133 transitions. [2022-12-14 15:58:34,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 26980 states and 42133 transitions. [2022-12-14 15:58:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 15:58:34,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:34,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:34,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 15:58:34,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:34,460 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:34,461 INFO L85 PathProgramCache]: Analyzing trace with hash 282414638, now seen corresponding path program 1 times [2022-12-14 15:58:34,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:34,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166641816] [2022-12-14 15:58:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:34,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:58:34,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:34,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166641816] [2022-12-14 15:58:34,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166641816] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:34,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105350283] [2022-12-14 15:58:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:34,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:34,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:34,531 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:34,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 15:58:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:34,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:58:34,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:58:34,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:58:34,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105350283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:34,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:58:34,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:58:34,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693981909] [2022-12-14 15:58:34,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:58:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:58:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:34,712 INFO L87 Difference]: Start difference. First operand 26980 states and 42133 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:40,294 INFO L93 Difference]: Finished difference Result 78989 states and 127278 transitions. [2022-12-14 15:58:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:58:40,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-12-14 15:58:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:40,426 INFO L225 Difference]: With dead ends: 78989 [2022-12-14 15:58:40,426 INFO L226 Difference]: Without dead ends: 52744 [2022-12-14 15:58:40,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:40,491 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 338 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:40,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 569 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:58:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52744 states. [2022-12-14 15:58:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52744 to 52580. [2022-12-14 15:58:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52580 states, 44531 states have (on average 1.4998540342682625) internal successors, (66790), 44737 states have internal predecessors, (66790), 6010 states have call successors, (6010), 2020 states have call predecessors, (6010), 2037 states have return successors, (9237), 5824 states have call predecessors, (9237), 6007 states have call successors, (9237) [2022-12-14 15:58:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52580 states to 52580 states and 82037 transitions. [2022-12-14 15:58:46,072 INFO L78 Accepts]: Start accepts. Automaton has 52580 states and 82037 transitions. Word has length 137 [2022-12-14 15:58:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:46,072 INFO L495 AbstractCegarLoop]: Abstraction has 52580 states and 82037 transitions. [2022-12-14 15:58:46,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:58:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 52580 states and 82037 transitions. [2022-12-14 15:58:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 15:58:46,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:46,115 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:46,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 15:58:46,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd674be-830c-4cd2-b081-e0f227277437/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 15:58:46,316 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:46,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1838931278, now seen corresponding path program 1 times [2022-12-14 15:58:46,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:46,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834932606] [2022-12-14 15:58:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:46,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 15:58:46,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834932606] [2022-12-14 15:58:46,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834932606] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:46,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:58:46,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:58:46,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426299544] [2022-12-14 15:58:46,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:46,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:58:46,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:58:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:58:46,525 INFO L87 Difference]: Start difference. First operand 52580 states and 82037 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:58:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:55,792 INFO L93 Difference]: Finished difference Result 134764 states and 211067 transitions. [2022-12-14 15:58:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:58:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-12-14 15:58:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:56,073 INFO L225 Difference]: With dead ends: 134764 [2022-12-14 15:58:56,074 INFO L226 Difference]: Without dead ends: 82920 [2022-12-14 15:58:56,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:58:56,193 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1063 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:56,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 802 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:58:56,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82920 states. [2022-12-14 15:59:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82920 to 82916. [2022-12-14 15:59:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82916 states, 70259 states have (on average 1.4953529085241748) internal successors, (105062), 70593 states have internal predecessors, (105062), 9466 states have call successors, (9466), 3172 states have call predecessors, (9466), 3189 states have return successors, (14997), 9152 states have call predecessors, (14997), 9463 states have call successors, (14997) [2022-12-14 15:59:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82916 states to 82916 states and 129525 transitions. [2022-12-14 15:59:05,358 INFO L78 Accepts]: Start accepts. Automaton has 82916 states and 129525 transitions. Word has length 137 [2022-12-14 15:59:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:05,359 INFO L495 AbstractCegarLoop]: Abstraction has 82916 states and 129525 transitions. [2022-12-14 15:59:05,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:59:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 82916 states and 129525 transitions. [2022-12-14 15:59:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 15:59:05,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:05,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:05,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 15:59:05,414 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:05,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:05,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1583241445, now seen corresponding path program 1 times [2022-12-14 15:59:05,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:05,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434461598] [2022-12-14 15:59:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:05,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 15:59:05,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:05,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434461598] [2022-12-14 15:59:05,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434461598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:05,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:05,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:59:05,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757340734] [2022-12-14 15:59:05,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:05,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:59:05,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:05,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:59:05,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:05,673 INFO L87 Difference]: Start difference. First operand 82916 states and 129525 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:59:22,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:22,097 INFO L93 Difference]: Finished difference Result 223852 states and 353083 transitions. [2022-12-14 15:59:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:59:22,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 138 [2022-12-14 15:59:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:22,536 INFO L225 Difference]: With dead ends: 223852 [2022-12-14 15:59:22,536 INFO L226 Difference]: Without dead ends: 141672 [2022-12-14 15:59:22,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:59:22,700 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1089 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:22,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1105 Valid, 898 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:59:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141672 states. [2022-12-14 15:59:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141672 to 122980. [2022-12-14 15:59:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122980 states, 104243 states have (on average 1.4919562944274436) internal successors, (155526), 104737 states have internal predecessors, (155526), 14010 states have call successors, (14010), 4708 states have call predecessors, (14010), 4725 states have return successors, (22181), 13536 states have call predecessors, (22181), 14007 states have call successors, (22181) [2022-12-14 15:59:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122980 states to 122980 states and 191717 transitions. [2022-12-14 15:59:37,408 INFO L78 Accepts]: Start accepts. Automaton has 122980 states and 191717 transitions. Word has length 138 [2022-12-14 15:59:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:37,408 INFO L495 AbstractCegarLoop]: Abstraction has 122980 states and 191717 transitions. [2022-12-14 15:59:37,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:59:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 122980 states and 191717 transitions. [2022-12-14 15:59:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 15:59:37,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:37,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:37,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 15:59:37,480 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2105121170, now seen corresponding path program 1 times [2022-12-14 15:59:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:37,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972072271] [2022-12-14 15:59:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:37,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 15:59:37,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:37,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972072271] [2022-12-14 15:59:37,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972072271] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:37,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:37,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:59:37,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798042340] [2022-12-14 15:59:37,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:37,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:59:37,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:37,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:59:37,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:37,714 INFO L87 Difference]: Start difference. First operand 122980 states and 191717 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 16:00:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:00:01,780 INFO L93 Difference]: Finished difference Result 330156 states and 520235 transitions. [2022-12-14 16:00:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 16:00:01,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 139 [2022-12-14 16:00:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:00:02,500 INFO L225 Difference]: With dead ends: 330156 [2022-12-14 16:00:02,500 INFO L226 Difference]: Without dead ends: 207912 [2022-12-14 16:00:02,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 16:00:02,889 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1066 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:00:02,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 888 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:00:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207912 states. [2022-12-14 16:00:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207912 to 182564. [2022-12-14 16:00:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182564 states, 154771 states have (on average 1.4881728489187251) internal successors, (230326), 155505 states have internal predecessors, (230326), 20762 states have call successors, (20762), 7012 states have call predecessors, (20762), 7029 states have return successors, (32837), 20048 states have call predecessors, (32837), 20759 states have call successors, (32837) [2022-12-14 16:00:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182564 states to 182564 states and 283925 transitions. [2022-12-14 16:00:25,861 INFO L78 Accepts]: Start accepts. Automaton has 182564 states and 283925 transitions. Word has length 139 [2022-12-14 16:00:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:00:25,862 INFO L495 AbstractCegarLoop]: Abstraction has 182564 states and 283925 transitions. [2022-12-14 16:00:25,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 16:00:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 182564 states and 283925 transitions. [2022-12-14 16:00:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 16:00:25,967 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:00:25,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:00:25,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 16:00:25,967 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:00:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:00:25,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1707161729, now seen corresponding path program 1 times [2022-12-14 16:00:25,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:00:25,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43953699] [2022-12-14 16:00:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:25,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:00:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 16:00:26,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:00:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43953699] [2022-12-14 16:00:26,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43953699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:00:26,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:00:26,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 16:00:26,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261859487] [2022-12-14 16:00:26,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:00:26,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:00:26,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:00:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:00:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:00:26,202 INFO L87 Difference]: Start difference. First operand 182564 states and 283925 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 16:01:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:17,217 INFO L93 Difference]: Finished difference Result 606124 states and 956268 transitions. [2022-12-14 16:01:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 16:01:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 140 [2022-12-14 16:01:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:19,080 INFO L225 Difference]: With dead ends: 606124 [2022-12-14 16:01:19,080 INFO L226 Difference]: Without dead ends: 424296 [2022-12-14 16:01:19,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 16:01:19,570 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 1122 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:19,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 808 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:01:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424296 states. [2022-12-14 16:02:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424296 to 357476. [2022-12-14 16:02:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357476 states, 303283 states have (on average 1.482885621680081) internal successors, (449734), 304737 states have internal predecessors, (449734), 40250 states have call successors, (40250), 13924 states have call predecessors, (40250), 13941 states have return successors, (63365), 38816 states have call predecessors, (63365), 40247 states have call successors, (63365) [2022-12-14 16:02:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357476 states to 357476 states and 553349 transitions. [2022-12-14 16:02:07,632 INFO L78 Accepts]: Start accepts. Automaton has 357476 states and 553349 transitions. Word has length 140 [2022-12-14 16:02:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:07,633 INFO L495 AbstractCegarLoop]: Abstraction has 357476 states and 553349 transitions. [2022-12-14 16:02:07,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 16:02:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 357476 states and 553349 transitions. [2022-12-14 16:02:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 16:02:07,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:07,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:07,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 16:02:07,976 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash 80511498, now seen corresponding path program 1 times [2022-12-14 16:02:07,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:07,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115323422] [2022-12-14 16:02:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:07,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 16:02:08,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115323422] [2022-12-14 16:02:08,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115323422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:08,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:02:08,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 16:02:08,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728646049] [2022-12-14 16:02:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:08,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:02:08,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:02:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:02:08,288 INFO L87 Difference]: Start difference. First operand 357476 states and 553349 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 16:03:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:26,751 INFO L93 Difference]: Finished difference Result 946732 states and 1483019 transitions. [2022-12-14 16:03:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 16:03:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 141 [2022-12-14 16:03:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:29,259 INFO L225 Difference]: With dead ends: 946732 [2022-12-14 16:03:29,259 INFO L226 Difference]: Without dead ends: 589992 [2022-12-14 16:03:30,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 16:03:30,221 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1020 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:30,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 868 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:03:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589992 states.