./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/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_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/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_3eb354d8-491e-4a93-8055-1c09fa9cf886/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 e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 --- 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 15:56:03,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:56:03,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:56:03,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:56:03,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:56:03,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:56:03,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:56:03,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:56:03,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:56:03,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:56:03,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:56:03,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:56:03,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:56:03,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:56:03,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:56:03,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:56:03,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:56:03,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:56:03,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:56:03,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:56:03,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:56:03,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:56:03,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:56:03,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:56:03,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:56:03,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:56:03,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:56:03,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:56:03,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:56:03,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:56:03,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:56:03,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:56:03,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:56:03,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:56:03,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:56:03,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:56:03,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:56:03,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:56:03,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:56:03,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:56:03,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:56:03,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:56:03,345 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:56:03,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:56:03,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:56:03,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:56:03,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:56:03,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:56:03,346 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:56:03,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:56:03,347 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:56:03,347 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:56:03,347 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:56:03,347 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:56:03,347 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:56:03,347 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:56:03,348 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:56:03,348 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:56:03,348 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:56:03,348 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:56:03,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:56:03,349 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:56:03,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:56:03,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:56:03,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:56:03,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:56:03,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:56:03,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:56:03,350 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:56:03,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:56:03,350 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:56:03,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:56:03,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:56:03,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:56:03,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:56:03,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:56:03,351 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:56:03,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:56:03,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:56:03,351 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:56:03,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:56:03,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:56:03,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:56:03,352 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_3eb354d8-491e-4a93-8055-1c09fa9cf886/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 [2022-12-14 15:56:03,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:56:03,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:56:03,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:56:03,543 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:56:03,543 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:56:03,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2022-12-14 15:56:06,123 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:56:06,310 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:56:06,310 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2022-12-14 15:56:06,320 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/data/a779dfe5f/61ac994c1eb54e70be4fd3d0bf82769c/FLAGf55690b80 [2022-12-14 15:56:06,674 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/data/a779dfe5f/61ac994c1eb54e70be4fd3d0bf82769c [2022-12-14 15:56:06,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:56:06,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:56:06,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:56:06,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:56:06,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:56:06,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:06,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2b3de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06, skipping insertion in model container [2022-12-14 15:56:06,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:06,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:56:06,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:56:06,836 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_3eb354d8-491e-4a93-8055-1c09fa9cf886/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2022-12-14 15:56:06,869 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_3eb354d8-491e-4a93-8055-1c09fa9cf886/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2022-12-14 15:56:06,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:56:06,931 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:56:06,939 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_3eb354d8-491e-4a93-8055-1c09fa9cf886/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2022-12-14 15:56:06,948 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_3eb354d8-491e-4a93-8055-1c09fa9cf886/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2022-12-14 15:56:06,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:56:06,986 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:56:06,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06 WrapperNode [2022-12-14 15:56:06,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:56:06,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:56:06,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:56:06,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:56:06,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,040 INFO L138 Inliner]: procedures = 64, calls = 73, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 828 [2022-12-14 15:56:07,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:56:07,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:56:07,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:56:07,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:56:07,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,079 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:56:07,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:56:07,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:56:07,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:56:07,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (1/1) ... [2022-12-14 15:56:07,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:56:07,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:07,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:56:07,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:56:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:56:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 15:56:07,151 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 15:56:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-12-14 15:56:07,151 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-12-14 15:56:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 15:56:07,152 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 15:56:07,152 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 15:56:07,152 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 15:56:07,152 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 15:56:07,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 15:56:07,152 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 15:56:07,153 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 15:56:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 15:56:07,153 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 15:56:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:56:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 15:56:07,153 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 15:56:07,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:56:07,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:56:07,154 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 15:56:07,154 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 15:56:07,154 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 15:56:07,154 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 15:56:07,257 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:56:07,259 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:56:07,811 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:56:08,046 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:56:08,046 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-14 15:56:08,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:56:08 BoogieIcfgContainer [2022-12-14 15:56:08,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:56:08,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:56:08,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:56:08,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:56:08,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:56:06" (1/3) ... [2022-12-14 15:56:08,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be9a3b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:56:08, skipping insertion in model container [2022-12-14 15:56:08,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:06" (2/3) ... [2022-12-14 15:56:08,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be9a3b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:56:08, skipping insertion in model container [2022-12-14 15:56:08,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:56:08" (3/3) ... [2022-12-14 15:56:08,055 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2022-12-14 15:56:08,069 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:56:08,069 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 15:56:08,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:56:08,111 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;@412df2e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:56:08,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 15:56:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 201 states, 158 states have (on average 1.5632911392405062) internal successors, (247), 165 states have internal predecessors, (247), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 15:56:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 15:56:08,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:08,123 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] [2022-12-14 15:56:08,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1452017222, now seen corresponding path program 1 times [2022-12-14 15:56:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:08,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817736502] [2022-12-14 15:56:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:08,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:08,325 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 15:56:08,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:08,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817736502] [2022-12-14 15:56:08,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817736502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:08,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:08,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:08,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388328711] [2022-12-14 15:56:08,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:08,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:08,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:08,358 INFO L87 Difference]: Start difference. First operand has 201 states, 158 states have (on average 1.5632911392405062) internal successors, (247), 165 states have internal predecessors, (247), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:56:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:08,518 INFO L93 Difference]: Finished difference Result 434 states and 662 transitions. [2022-12-14 15:56:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:08,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-14 15:56:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:08,530 INFO L225 Difference]: With dead ends: 434 [2022-12-14 15:56:08,530 INFO L226 Difference]: Without dead ends: 233 [2022-12-14 15:56:08,534 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 15:56:08,537 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 272 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:08,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 315 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-12-14 15:56:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2022-12-14 15:56:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 184 states have (on average 1.4891304347826086) internal successors, (274), 188 states have internal predecessors, (274), 33 states have call successors, (33), 12 states have call predecessors, (33), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 15:56:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 336 transitions. [2022-12-14 15:56:08,585 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 336 transitions. Word has length 28 [2022-12-14 15:56:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:08,585 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 336 transitions. [2022-12-14 15:56:08,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:56:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 336 transitions. [2022-12-14 15:56:08,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 15:56:08,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:08,587 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] [2022-12-14 15:56:08,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:56:08,588 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash -809436015, now seen corresponding path program 1 times [2022-12-14 15:56:08,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:08,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889294904] [2022-12-14 15:56:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:08,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:08,632 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 15:56:08,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:08,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889294904] [2022-12-14 15:56:08,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889294904] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:08,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:08,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:08,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203665612] [2022-12-14 15:56:08,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:08,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:08,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:08,635 INFO L87 Difference]: Start difference. First operand 229 states and 336 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:56:08,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:08,727 INFO L93 Difference]: Finished difference Result 385 states and 553 transitions. [2022-12-14 15:56:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:08,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-12-14 15:56:08,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:08,731 INFO L225 Difference]: With dead ends: 385 [2022-12-14 15:56:08,731 INFO L226 Difference]: Without dead ends: 304 [2022-12-14 15:56:08,732 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 15:56:08,732 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 270 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:08,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 300 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-12-14 15:56:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2022-12-14 15:56:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 244 states have (on average 1.4549180327868851) internal successors, (355), 248 states have internal predecessors, (355), 40 states have call successors, (40), 16 states have call predecessors, (40), 14 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 15:56:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 431 transitions. [2022-12-14 15:56:08,751 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 431 transitions. Word has length 29 [2022-12-14 15:56:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:08,751 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 431 transitions. [2022-12-14 15:56:08,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:56:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 431 transitions. [2022-12-14 15:56:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 15:56:08,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:08,753 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] [2022-12-14 15:56:08,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:56:08,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:08,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:08,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1441773529, now seen corresponding path program 1 times [2022-12-14 15:56:08,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:08,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301114845] [2022-12-14 15:56:08,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:08,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:08,788 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 15:56:08,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:08,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301114845] [2022-12-14 15:56:08,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301114845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:08,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:08,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:08,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970043172] [2022-12-14 15:56:08,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:08,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:08,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:08,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:08,791 INFO L87 Difference]: Start difference. First operand 300 states and 431 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:56:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:08,892 INFO L93 Difference]: Finished difference Result 540 states and 759 transitions. [2022-12-14 15:56:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:08,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-12-14 15:56:08,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:08,895 INFO L225 Difference]: With dead ends: 540 [2022-12-14 15:56:08,895 INFO L226 Difference]: Without dead ends: 388 [2022-12-14 15:56:08,896 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 15:56:08,896 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 46 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:08,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 485 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-12-14 15:56:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 374. [2022-12-14 15:56:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 307 states have (on average 1.4332247557003257) internal successors, (440), 313 states have internal predecessors, (440), 46 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 15:56:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 528 transitions. [2022-12-14 15:56:08,921 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 528 transitions. Word has length 30 [2022-12-14 15:56:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:08,921 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 528 transitions. [2022-12-14 15:56:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:56:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 528 transitions. [2022-12-14 15:56:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 15:56:08,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:08,923 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] [2022-12-14 15:56:08,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:56:08,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1144409774, now seen corresponding path program 1 times [2022-12-14 15:56:08,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:08,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012276323] [2022-12-14 15:56:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:08,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:08,975 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 15:56:08,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:08,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012276323] [2022-12-14 15:56:08,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012276323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:08,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:08,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310581862] [2022-12-14 15:56:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:08,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:08,978 INFO L87 Difference]: Start difference. First operand 374 states and 528 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 15:56:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:09,073 INFO L93 Difference]: Finished difference Result 537 states and 746 transitions. [2022-12-14 15:56:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:09,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-12-14 15:56:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:09,076 INFO L225 Difference]: With dead ends: 537 [2022-12-14 15:56:09,076 INFO L226 Difference]: Without dead ends: 379 [2022-12-14 15:56:09,077 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 15:56:09,078 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:09,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 517 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-12-14 15:56:09,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 368. [2022-12-14 15:56:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 301 states have (on average 1.415282392026578) internal successors, (426), 307 states have internal predecessors, (426), 46 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 15:56:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 514 transitions. [2022-12-14 15:56:09,092 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 514 transitions. Word has length 43 [2022-12-14 15:56:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:09,093 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 514 transitions. [2022-12-14 15:56:09,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 15:56:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 514 transitions. [2022-12-14 15:56:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 15:56:09,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:09,094 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] [2022-12-14 15:56:09,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:56:09,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:09,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash -875975302, now seen corresponding path program 1 times [2022-12-14 15:56:09,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:09,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461038021] [2022-12-14 15:56:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:09,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:56:09,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461038021] [2022-12-14 15:56:09,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461038021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:09,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:09,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:09,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518385513] [2022-12-14 15:56:09,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:09,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:09,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:09,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:09,125 INFO L87 Difference]: Start difference. First operand 368 states and 514 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:56:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:09,196 INFO L93 Difference]: Finished difference Result 617 states and 838 transitions. [2022-12-14 15:56:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:09,197 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-12-14 15:56:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:09,198 INFO L225 Difference]: With dead ends: 617 [2022-12-14 15:56:09,198 INFO L226 Difference]: Without dead ends: 414 [2022-12-14 15:56:09,199 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 15:56:09,200 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 256 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:09,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 298 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-12-14 15:56:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-12-14 15:56:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 340 states have (on average 1.3794117647058823) internal successors, (469), 346 states have internal predecessors, (469), 50 states have call successors, (50), 24 states have call predecessors, (50), 22 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2022-12-14 15:56:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 565 transitions. [2022-12-14 15:56:09,215 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 565 transitions. Word has length 46 [2022-12-14 15:56:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:09,215 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 565 transitions. [2022-12-14 15:56:09,216 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:56:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 565 transitions. [2022-12-14 15:56:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:56:09,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:09,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:56:09,217 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1559414321, now seen corresponding path program 1 times [2022-12-14 15:56:09,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:09,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240708236] [2022-12-14 15:56:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:56:09,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:09,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240708236] [2022-12-14 15:56:09,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240708236] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:09,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:09,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:56:09,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055738610] [2022-12-14 15:56:09,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:09,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:56:09,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:09,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:56:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:56:09,267 INFO L87 Difference]: Start difference. First operand 414 states and 565 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 15:56:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:09,417 INFO L93 Difference]: Finished difference Result 454 states and 612 transitions. [2022-12-14 15:56:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:56:09,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-12-14 15:56:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:09,420 INFO L225 Difference]: With dead ends: 454 [2022-12-14 15:56:09,420 INFO L226 Difference]: Without dead ends: 451 [2022-12-14 15:56:09,421 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 15:56:09,421 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 468 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:09,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 296 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-12-14 15:56:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 413. [2022-12-14 15:56:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 340 states have (on average 1.3735294117647059) internal successors, (467), 345 states have internal predecessors, (467), 49 states have call successors, (49), 24 states have call predecessors, (49), 22 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2022-12-14 15:56:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 562 transitions. [2022-12-14 15:56:09,445 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 562 transitions. Word has length 47 [2022-12-14 15:56:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:09,445 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 562 transitions. [2022-12-14 15:56:09,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 15:56:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 562 transitions. [2022-12-14 15:56:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 15:56:09,447 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:09,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:09,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:56:09,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:09,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1098331107, now seen corresponding path program 1 times [2022-12-14 15:56:09,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:09,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985612056] [2022-12-14 15:56:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:09,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:56:09,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:09,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985612056] [2022-12-14 15:56:09,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985612056] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:09,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749428536] [2022-12-14 15:56:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:09,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:09,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:09,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:09,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:56:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:09,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:56:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:56:09,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:56:10,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749428536] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:10,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883243081] [2022-12-14 15:56:10,050 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-12-14 15:56:10,050 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:56:10,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:56:10,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:56:10,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:56:12,597 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 145 for LOIs [2022-12-14 15:56:12,608 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 160 for LOIs [2022-12-14 15:56:12,622 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 336 for LOIs [2022-12-14 15:56:14,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:56:34,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7786#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~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) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 15:56:34,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:56:34,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:56:34,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 15:56:34,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213025568] [2022-12-14 15:56:34,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:56:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:56:34,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:34,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:56:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 15:56:34,164 INFO L87 Difference]: Start difference. First operand 413 states and 562 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 15:56:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:34,463 INFO L93 Difference]: Finished difference Result 856 states and 1130 transitions. [2022-12-14 15:56:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:56:34,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-12-14 15:56:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:34,466 INFO L225 Difference]: With dead ends: 856 [2022-12-14 15:56:34,466 INFO L226 Difference]: Without dead ends: 853 [2022-12-14 15:56:34,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 15:56:34,467 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 587 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:34,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1049 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:56:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-12-14 15:56:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 622. [2022-12-14 15:56:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 517 states have (on average 1.3539651837524178) internal successors, (700), 524 states have internal predecessors, (700), 68 states have call successors, (68), 37 states have call predecessors, (68), 35 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2022-12-14 15:56:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 833 transitions. [2022-12-14 15:56:34,498 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 833 transitions. Word has length 48 [2022-12-14 15:56:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:34,498 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 833 transitions. [2022-12-14 15:56:34,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 15:56:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 833 transitions. [2022-12-14 15:56:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 15:56:34,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:34,499 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] [2022-12-14 15:56:34,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:34,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:34,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1487005991, now seen corresponding path program 1 times [2022-12-14 15:56:34,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:34,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612133336] [2022-12-14 15:56:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:34,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:34,781 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 15:56:34,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612133336] [2022-12-14 15:56:34,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612133336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:34,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:34,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:56:34,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866985145] [2022-12-14 15:56:34,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:34,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:56:34,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:56:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:56:34,783 INFO L87 Difference]: Start difference. First operand 622 states and 833 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 15:56:34,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:34,980 INFO L93 Difference]: Finished difference Result 894 states and 1268 transitions. [2022-12-14 15:56:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:56:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 56 [2022-12-14 15:56:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:34,984 INFO L225 Difference]: With dead ends: 894 [2022-12-14 15:56:34,984 INFO L226 Difference]: Without dead ends: 752 [2022-12-14 15:56:34,985 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 15:56:34,985 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 444 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:34,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 699 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:56:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-12-14 15:56:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 751. [2022-12-14 15:56:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 622 states have (on average 1.3729903536977492) internal successors, (854), 630 states have internal predecessors, (854), 86 states have call successors, (86), 43 states have call predecessors, (86), 41 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-12-14 15:56:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1023 transitions. [2022-12-14 15:56:35,023 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1023 transitions. Word has length 56 [2022-12-14 15:56:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:35,024 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 1023 transitions. [2022-12-14 15:56:35,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 15:56:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1023 transitions. [2022-12-14 15:56:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 15:56:35,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:35,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:35,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:56:35,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1804983466, now seen corresponding path program 2 times [2022-12-14 15:56:35,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:35,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674383179] [2022-12-14 15:56:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:35,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 15:56:35,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674383179] [2022-12-14 15:56:35,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674383179] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:35,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:35,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:35,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138290763] [2022-12-14 15:56:35,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:35,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:35,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:35,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:35,053 INFO L87 Difference]: Start difference. First operand 751 states and 1023 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 15:56:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:35,147 INFO L93 Difference]: Finished difference Result 1081 states and 1456 transitions. [2022-12-14 15:56:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-12-14 15:56:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:35,150 INFO L225 Difference]: With dead ends: 1081 [2022-12-14 15:56:35,150 INFO L226 Difference]: Without dead ends: 693 [2022-12-14 15:56:35,150 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 15:56:35,151 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 268 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:35,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 310 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-12-14 15:56:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 684. [2022-12-14 15:56:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 565 states have (on average 1.368141592920354) internal successors, (773), 574 states have internal predecessors, (773), 80 states have call successors, (80), 39 states have call predecessors, (80), 37 states have return successors, (77), 71 states have call predecessors, (77), 77 states have call successors, (77) [2022-12-14 15:56:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 930 transitions. [2022-12-14 15:56:35,191 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 930 transitions. Word has length 61 [2022-12-14 15:56:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:35,191 INFO L495 AbstractCegarLoop]: Abstraction has 684 states and 930 transitions. [2022-12-14 15:56:35,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 15:56:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 930 transitions. [2022-12-14 15:56:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 15:56:35,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:35,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:56:35,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:56:35,194 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:35,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1588701574, now seen corresponding path program 1 times [2022-12-14 15:56:35,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:35,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612274833] [2022-12-14 15:56:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:35,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:56:35,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:35,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612274833] [2022-12-14 15:56:35,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612274833] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:35,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281197587] [2022-12-14 15:56:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:35,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:35,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:35,322 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:35,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:56:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:35,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:56:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:56:35,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:35,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281197587] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:35,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:56:35,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 15:56:35,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682049005] [2022-12-14 15:56:35,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:35,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:35,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:56:35,425 INFO L87 Difference]: Start difference. First operand 684 states and 930 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 15:56:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:35,519 INFO L93 Difference]: Finished difference Result 811 states and 1089 transitions. [2022-12-14 15:56:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-12-14 15:56:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:35,521 INFO L225 Difference]: With dead ends: 811 [2022-12-14 15:56:35,521 INFO L226 Difference]: Without dead ends: 277 [2022-12-14 15:56:35,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:56:35,522 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 25 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:35,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 486 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-12-14 15:56:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-12-14 15:56:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 222 states have (on average 1.490990990990991) internal successors, (331), 225 states have internal predecessors, (331), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-14 15:56:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 413 transitions. [2022-12-14 15:56:35,539 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 413 transitions. Word has length 73 [2022-12-14 15:56:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:35,539 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 413 transitions. [2022-12-14 15:56:35,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 15:56:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 413 transitions. [2022-12-14 15:56:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 15:56:35,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:35,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:35,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:56:35,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:35,743 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1432004654, now seen corresponding path program 1 times [2022-12-14 15:56:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:35,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667934419] [2022-12-14 15:56:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:35,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:56:35,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:35,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667934419] [2022-12-14 15:56:35,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667934419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:35,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822731138] [2022-12-14 15:56:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:35,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:35,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:35,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:35,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:56:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:36,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:56:36,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:56:36,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:36,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822731138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:36,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:56:36,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:56:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545592994] [2022-12-14 15:56:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:36,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:56:36,118 INFO L87 Difference]: Start difference. First operand 277 states and 413 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 15:56:36,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:36,240 INFO L93 Difference]: Finished difference Result 812 states and 1232 transitions. [2022-12-14 15:56:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:36,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 109 [2022-12-14 15:56:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:36,243 INFO L225 Difference]: With dead ends: 812 [2022-12-14 15:56:36,244 INFO L226 Difference]: Without dead ends: 541 [2022-12-14 15:56:36,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 15:56:36,245 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 191 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:36,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 406 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-12-14 15:56:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 535. [2022-12-14 15:56:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 434 states have (on average 1.4884792626728112) internal successors, (646), 438 states have internal predecessors, (646), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-12-14 15:56:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 796 transitions. [2022-12-14 15:56:36,279 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 796 transitions. Word has length 109 [2022-12-14 15:56:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:36,279 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 796 transitions. [2022-12-14 15:56:36,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 15:56:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 796 transitions. [2022-12-14 15:56:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 15:56:36,281 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:36,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:36,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:56:36,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 15:56:36,481 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:36,482 INFO L85 PathProgramCache]: Analyzing trace with hash -995259022, now seen corresponding path program 1 times [2022-12-14 15:56:36,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:36,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029750631] [2022-12-14 15:56:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:36,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:56:36,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:36,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029750631] [2022-12-14 15:56:36,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029750631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:36,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368672931] [2022-12-14 15:56:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:36,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:36,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:36,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:36,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:56:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:36,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:56:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 15:56:36,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:36,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368672931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:36,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:56:36,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:56:36,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902930199] [2022-12-14 15:56:36,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:36,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:36,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:36,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:36,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:56:36,818 INFO L87 Difference]: Start difference. First operand 535 states and 796 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 15:56:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:36,974 INFO L93 Difference]: Finished difference Result 1580 states and 2391 transitions. [2022-12-14 15:56:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:36,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 109 [2022-12-14 15:56:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:36,978 INFO L225 Difference]: With dead ends: 1580 [2022-12-14 15:56:36,978 INFO L226 Difference]: Without dead ends: 1051 [2022-12-14 15:56:36,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 15:56:36,980 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 188 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 370 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 15:56:36,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 370 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-12-14 15:56:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1043. [2022-12-14 15:56:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 852 states have (on average 1.483568075117371) internal successors, (1264), 858 states have internal predecessors, (1264), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-14 15:56:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1546 transitions. [2022-12-14 15:56:37,029 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1546 transitions. Word has length 109 [2022-12-14 15:56:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:37,030 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1546 transitions. [2022-12-14 15:56:37,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 15:56:37,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1546 transitions. [2022-12-14 15:56:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 15:56:37,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:37,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:37,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:56:37,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:37,232 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1872086062, now seen corresponding path program 1 times [2022-12-14 15:56:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:37,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102439372] [2022-12-14 15:56:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:37,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:56:37,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:37,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102439372] [2022-12-14 15:56:37,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102439372] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:37,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830512401] [2022-12-14 15:56:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:37,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:37,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:37,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:37,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:56:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:37,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:56:37,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 15:56:37,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:37,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830512401] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:37,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:56:37,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:56:37,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495545763] [2022-12-14 15:56:37,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:37,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:37,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:37,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:37,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:56:37,449 INFO L87 Difference]: Start difference. First operand 1043 states and 1546 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 15:56:37,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:37,680 INFO L93 Difference]: Finished difference Result 3092 states and 4659 transitions. [2022-12-14 15:56:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:37,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 109 [2022-12-14 15:56:37,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:37,689 INFO L225 Difference]: With dead ends: 3092 [2022-12-14 15:56:37,690 INFO L226 Difference]: Without dead ends: 2055 [2022-12-14 15:56:37,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 15:56:37,694 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 197 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:37,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 404 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2022-12-14 15:56:37,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 2043. [2022-12-14 15:56:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 1676 states have (on average 1.477326968973747) internal successors, (2476), 1686 states have internal predecessors, (2476), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-12-14 15:56:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 3014 transitions. [2022-12-14 15:56:37,854 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 3014 transitions. Word has length 109 [2022-12-14 15:56:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:37,854 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 3014 transitions. [2022-12-14 15:56:37,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 15:56:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 3014 transitions. [2022-12-14 15:56:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 15:56:37,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:37,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:37,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:56:38,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:56:38,058 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:38,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1097090702, now seen corresponding path program 1 times [2022-12-14 15:56:38,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:38,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716293035] [2022-12-14 15:56:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:38,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:56:38,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716293035] [2022-12-14 15:56:38,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716293035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135480605] [2022-12-14 15:56:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:38,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:38,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:38,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:56:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:56:38,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:56:38,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135480605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:38,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:56:38,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:56:38,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785016605] [2022-12-14 15:56:38,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:38,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:38,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:56:38,309 INFO L87 Difference]: Start difference. First operand 2043 states and 3014 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 15:56:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:38,603 INFO L93 Difference]: Finished difference Result 6068 states and 9095 transitions. [2022-12-14 15:56:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:38,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 109 [2022-12-14 15:56:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:38,617 INFO L225 Difference]: With dead ends: 6068 [2022-12-14 15:56:38,617 INFO L226 Difference]: Without dead ends: 4031 [2022-12-14 15:56:38,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 15:56:38,623 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 182 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 370 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 15:56:38,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 370 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2022-12-14 15:56:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 4011. [2022-12-14 15:56:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4011 states, 3300 states have (on average 1.4703030303030302) internal successors, (4852), 3318 states have internal predecessors, (4852), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-12-14 15:56:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4011 states to 4011 states and 5886 transitions. [2022-12-14 15:56:38,836 INFO L78 Accepts]: Start accepts. Automaton has 4011 states and 5886 transitions. Word has length 109 [2022-12-14 15:56:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:38,836 INFO L495 AbstractCegarLoop]: Abstraction has 4011 states and 5886 transitions. [2022-12-14 15:56:38,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 15:56:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4011 states and 5886 transitions. [2022-12-14 15:56:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 15:56:38,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:38,845 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:38,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:39,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:56:39,046 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2020429870, now seen corresponding path program 1 times [2022-12-14 15:56:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:39,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878291537] [2022-12-14 15:56:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:39,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 15:56:39,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:39,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878291537] [2022-12-14 15:56:39,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878291537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:39,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:39,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:39,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590012313] [2022-12-14 15:56:39,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:39,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:39,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:39,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:39,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:39,147 INFO L87 Difference]: Start difference. First operand 4011 states and 5886 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 15:56:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:39,494 INFO L93 Difference]: Finished difference Result 7135 states and 10641 transitions. [2022-12-14 15:56:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 109 [2022-12-14 15:56:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:39,512 INFO L225 Difference]: With dead ends: 7135 [2022-12-14 15:56:39,512 INFO L226 Difference]: Without dead ends: 5067 [2022-12-14 15:56:39,517 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 15:56:39,517 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 91 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:39,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 466 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2022-12-14 15:56:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 4731. [2022-12-14 15:56:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4731 states, 3988 states have (on average 1.5135406218655967) internal successors, (6036), 4006 states have internal predecessors, (6036), 534 states have call successors, (534), 209 states have call predecessors, (534), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-12-14 15:56:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4731 states to 4731 states and 7102 transitions. [2022-12-14 15:56:39,834 INFO L78 Accepts]: Start accepts. Automaton has 4731 states and 7102 transitions. Word has length 109 [2022-12-14 15:56:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:39,835 INFO L495 AbstractCegarLoop]: Abstraction has 4731 states and 7102 transitions. [2022-12-14 15:56:39,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 15:56:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4731 states and 7102 transitions. [2022-12-14 15:56:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 15:56:39,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:39,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:39,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 15:56:39,844 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash 512805465, now seen corresponding path program 1 times [2022-12-14 15:56:39,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:39,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709360105] [2022-12-14 15:56:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:39,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 15:56:39,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:39,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709360105] [2022-12-14 15:56:39,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709360105] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:39,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:39,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:39,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017685780] [2022-12-14 15:56:39,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:39,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:39,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:39,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:39,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:39,898 INFO L87 Difference]: Start difference. First operand 4731 states and 7102 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:56:40,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:40,435 INFO L93 Difference]: Finished difference Result 14036 states and 21319 transitions. [2022-12-14 15:56:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:40,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 15:56:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:40,469 INFO L225 Difference]: With dead ends: 14036 [2022-12-14 15:56:40,470 INFO L226 Difference]: Without dead ends: 9311 [2022-12-14 15:56:40,479 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 15:56:40,479 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 184 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:40,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 372 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2022-12-14 15:56:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 9259. [2022-12-14 15:56:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9259 states, 7812 states have (on average 1.5038402457757296) internal successors, (11748), 7846 states have internal predecessors, (11748), 1030 states have call successors, (1030), 417 states have call predecessors, (1030), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-12-14 15:56:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9259 states to 9259 states and 13806 transitions. [2022-12-14 15:56:41,024 INFO L78 Accepts]: Start accepts. Automaton has 9259 states and 13806 transitions. Word has length 147 [2022-12-14 15:56:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:41,025 INFO L495 AbstractCegarLoop]: Abstraction has 9259 states and 13806 transitions. [2022-12-14 15:56:41,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:56:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 9259 states and 13806 transitions. [2022-12-14 15:56:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 15:56:41,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:41,054 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:41,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 15:56:41,055 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash -543517651, now seen corresponding path program 1 times [2022-12-14 15:56:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:41,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44467750] [2022-12-14 15:56:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:41,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 15:56:41,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:41,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44467750] [2022-12-14 15:56:41,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44467750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:41,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:41,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618121703] [2022-12-14 15:56:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:41,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:41,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:41,139 INFO L87 Difference]: Start difference. First operand 9259 states and 13806 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:56:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:42,259 INFO L93 Difference]: Finished difference Result 27476 states and 41431 transitions. [2022-12-14 15:56:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 15:56:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:42,307 INFO L225 Difference]: With dead ends: 27476 [2022-12-14 15:56:42,308 INFO L226 Difference]: Without dead ends: 18223 [2022-12-14 15:56:42,325 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 15:56:42,325 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 186 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:42,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 372 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18223 states. [2022-12-14 15:56:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18223 to 18123. [2022-12-14 15:56:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18123 states, 15300 states have (on average 1.49359477124183) internal successors, (22852), 15366 states have internal predecessors, (22852), 1990 states have call successors, (1990), 833 states have call predecessors, (1990), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-12-14 15:56:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18123 states to 18123 states and 26830 transitions. [2022-12-14 15:56:43,269 INFO L78 Accepts]: Start accepts. Automaton has 18123 states and 26830 transitions. Word has length 147 [2022-12-14 15:56:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:43,269 INFO L495 AbstractCegarLoop]: Abstraction has 18123 states and 26830 transitions. [2022-12-14 15:56:43,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:56:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 18123 states and 26830 transitions. [2022-12-14 15:56:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 15:56:43,302 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:43,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:43,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 15:56:43,303 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:43,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:43,303 INFO L85 PathProgramCache]: Analyzing trace with hash -234942947, now seen corresponding path program 1 times [2022-12-14 15:56:43,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:43,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249495575] [2022-12-14 15:56:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:43,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 15:56:43,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:43,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249495575] [2022-12-14 15:56:43,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249495575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:43,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:43,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:43,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998365489] [2022-12-14 15:56:43,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:43,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:43,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:43,381 INFO L87 Difference]: Start difference. First operand 18123 states and 26830 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:56:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:45,237 INFO L93 Difference]: Finished difference Result 53780 states and 80471 transitions. [2022-12-14 15:56:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:45,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 15:56:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:45,318 INFO L225 Difference]: With dead ends: 53780 [2022-12-14 15:56:45,319 INFO L226 Difference]: Without dead ends: 35663 [2022-12-14 15:56:45,352 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 15:56:45,353 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 189 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:45,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 372 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35663 states. [2022-12-14 15:56:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35663 to 35467. [2022-12-14 15:56:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35467 states, 29956 states have (on average 1.4828415008679396) internal successors, (44420), 30086 states have internal predecessors, (44420), 3846 states have call successors, (3846), 1665 states have call predecessors, (3846), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-12-14 15:56:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35467 states to 35467 states and 52110 transitions. [2022-12-14 15:56:47,525 INFO L78 Accepts]: Start accepts. Automaton has 35467 states and 52110 transitions. Word has length 147 [2022-12-14 15:56:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:47,525 INFO L495 AbstractCegarLoop]: Abstraction has 35467 states and 52110 transitions. [2022-12-14 15:56:47,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:56:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 35467 states and 52110 transitions. [2022-12-14 15:56:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 15:56:47,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:47,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:47,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 15:56:47,593 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:47,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1032727897, now seen corresponding path program 1 times [2022-12-14 15:56:47,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:47,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872146421] [2022-12-14 15:56:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:47,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 15:56:47,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:47,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872146421] [2022-12-14 15:56:47,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872146421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:47,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:47,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855093249] [2022-12-14 15:56:47,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:47,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:47,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:47,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:47,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:47,648 INFO L87 Difference]: Start difference. First operand 35467 states and 52110 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:56:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:51,776 INFO L93 Difference]: Finished difference Result 105236 states and 156183 transitions. [2022-12-14 15:56:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:51,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 15:56:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:51,955 INFO L225 Difference]: With dead ends: 105236 [2022-12-14 15:56:51,955 INFO L226 Difference]: Without dead ends: 69775 [2022-12-14 15:56:52,036 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 15:56:52,036 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 191 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:52,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 393 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69775 states. [2022-12-14 15:56:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69775 to 69387. [2022-12-14 15:56:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69387 states, 58628 states have (on average 1.4715835436992564) internal successors, (86276), 58886 states have internal predecessors, (86276), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-12-14 15:56:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69387 states to 69387 states and 101134 transitions. [2022-12-14 15:56:55,539 INFO L78 Accepts]: Start accepts. Automaton has 69387 states and 101134 transitions. Word has length 147 [2022-12-14 15:56:55,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:55,539 INFO L495 AbstractCegarLoop]: Abstraction has 69387 states and 101134 transitions. [2022-12-14 15:56:55,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:56:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 69387 states and 101134 transitions. [2022-12-14 15:56:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 15:56:55,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:55,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:56:55,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 15:56:55,657 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:56:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1596638073, now seen corresponding path program 1 times [2022-12-14 15:56:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:56:55,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21705375] [2022-12-14 15:56:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:55,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:56:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 15:56:55,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:56:55,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21705375] [2022-12-14 15:56:55,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21705375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:56:55,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689580095] [2022-12-14 15:56:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:55,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:55,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:55,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:55,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:56:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:55,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:56:55,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 15:56:55,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:55,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689580095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:55,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:56:55,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:56:55,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105293499] [2022-12-14 15:56:55,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:55,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:55,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:56:55,991 INFO L87 Difference]: Start difference. First operand 69387 states and 101134 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:57:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:00,082 INFO L93 Difference]: Finished difference Result 105107 states and 155668 transitions. [2022-12-14 15:57:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 168 [2022-12-14 15:57:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:00,246 INFO L225 Difference]: With dead ends: 105107 [2022-12-14 15:57:00,246 INFO L226 Difference]: Without dead ends: 69647 [2022-12-14 15:57:00,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:57:00,413 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 181 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:00,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 503 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:57:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69647 states. [2022-12-14 15:57:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69647 to 69131. [2022-12-14 15:57:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69131 states, 58372 states have (on average 1.4561090934009457) internal successors, (84996), 58630 states have internal predecessors, (84996), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-12-14 15:57:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69131 states to 69131 states and 99854 transitions. [2022-12-14 15:57:03,759 INFO L78 Accepts]: Start accepts. Automaton has 69131 states and 99854 transitions. Word has length 168 [2022-12-14 15:57:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:03,759 INFO L495 AbstractCegarLoop]: Abstraction has 69131 states and 99854 transitions. [2022-12-14 15:57:03,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:57:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 69131 states and 99854 transitions. [2022-12-14 15:57:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 15:57:03,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:03,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:03,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 15:57:04,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:04,082 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:04,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1745009157, now seen corresponding path program 1 times [2022-12-14 15:57:04,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:04,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675554409] [2022-12-14 15:57:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:04,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 15:57:04,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:04,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675554409] [2022-12-14 15:57:04,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675554409] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:57:04,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581020932] [2022-12-14 15:57:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:04,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:04,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:57:04,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:57:04,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:57:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:04,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:57:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 15:57:04,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:57:04,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581020932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:04,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:57:04,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:57:04,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064660767] [2022-12-14 15:57:04,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:04,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:57:04,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:04,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:57:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:57:04,405 INFO L87 Difference]: Start difference. First operand 69131 states and 99854 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:57:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:08,315 INFO L93 Difference]: Finished difference Result 122889 states and 174731 transitions. [2022-12-14 15:57:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:08,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 15:57:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:08,511 INFO L225 Difference]: With dead ends: 122889 [2022-12-14 15:57:08,511 INFO L226 Difference]: Without dead ends: 87813 [2022-12-14 15:57:08,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:57:08,596 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 193 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:08,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 258 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:57:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87813 states. [2022-12-14 15:57:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87813 to 87813. [2022-12-14 15:57:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87813 states, 75522 states have (on average 1.4033791477979927) internal successors, (105986), 75780 states have internal predecessors, (105986), 7940 states have call successors, (7940), 4351 states have call predecessors, (7940), 4350 states have return successors, (7938), 7682 states have call predecessors, (7938), 7938 states have call successors, (7938) [2022-12-14 15:57:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87813 states to 87813 states and 121864 transitions. [2022-12-14 15:57:13,388 INFO L78 Accepts]: Start accepts. Automaton has 87813 states and 121864 transitions. Word has length 168 [2022-12-14 15:57:13,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:13,389 INFO L495 AbstractCegarLoop]: Abstraction has 87813 states and 121864 transitions. [2022-12-14 15:57:13,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:57:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 87813 states and 121864 transitions. [2022-12-14 15:57:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 15:57:13,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:13,516 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:13,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:57:13,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:13,717 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash 5999838, now seen corresponding path program 1 times [2022-12-14 15:57:13,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:13,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688769758] [2022-12-14 15:57:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 15:57:14,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:14,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688769758] [2022-12-14 15:57:14,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688769758] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:57:14,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047428979] [2022-12-14 15:57:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:14,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:14,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:57:14,014 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:57:14,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:57:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:57:14,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:57:14,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:57:14,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047428979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:14,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:57:14,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:57:14,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824516735] [2022-12-14 15:57:14,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:14,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:57:14,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:57:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:57:14,190 INFO L87 Difference]: Start difference. First operand 87813 states and 121864 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:57:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:18,392 INFO L93 Difference]: Finished difference Result 132877 states and 187406 transitions. [2022-12-14 15:57:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:18,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 169 [2022-12-14 15:57:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:18,591 INFO L225 Difference]: With dead ends: 132877 [2022-12-14 15:57:18,591 INFO L226 Difference]: Without dead ends: 88073 [2022-12-14 15:57:18,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:57:18,676 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 169 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:18,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 509 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:57:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88073 states. [2022-12-14 15:57:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88073 to 87557. [2022-12-14 15:57:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87557 states, 75266 states have (on average 1.3877447984481706) internal successors, (104450), 75524 states have internal predecessors, (104450), 7940 states have call successors, (7940), 4351 states have call predecessors, (7940), 4350 states have return successors, (7938), 7682 states have call predecessors, (7938), 7938 states have call successors, (7938) [2022-12-14 15:57:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87557 states to 87557 states and 120328 transitions. [2022-12-14 15:57:23,469 INFO L78 Accepts]: Start accepts. Automaton has 87557 states and 120328 transitions. Word has length 169 [2022-12-14 15:57:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:23,469 INFO L495 AbstractCegarLoop]: Abstraction has 87557 states and 120328 transitions. [2022-12-14 15:57:23,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:57:23,470 INFO L276 IsEmpty]: Start isEmpty. Operand 87557 states and 120328 transitions. [2022-12-14 15:57:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 15:57:23,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:23,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 15:57:23,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:57:23,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 15:57:23,797 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -858324226, now seen corresponding path program 1 times [2022-12-14 15:57:23,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:23,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115651428] [2022-12-14 15:57:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:23,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 15:57:23,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115651428] [2022-12-14 15:57:23,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115651428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:57:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073189920] [2022-12-14 15:57:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:23,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:23,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:57:23,947 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:57:23,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:57:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:24,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:57:24,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:57:24,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:57:24,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073189920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:24,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:57:24,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 15:57:24,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5022670] [2022-12-14 15:57:24,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:24,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:57:24,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:24,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:57:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:57:24,105 INFO L87 Difference]: Start difference. First operand 87557 states and 120328 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 15:57:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:32,778 INFO L93 Difference]: Finished difference Result 267131 states and 366588 transitions. [2022-12-14 15:57:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:57:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 169 [2022-12-14 15:57:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:33,219 INFO L225 Difference]: With dead ends: 267131 [2022-12-14 15:57:33,219 INFO L226 Difference]: Without dead ends: 179581 [2022-12-14 15:57:33,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:57:33,336 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 218 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:33,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 906 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:57:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179581 states. [2022-12-14 15:57:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179581 to 179321. [2022-12-14 15:57:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179321 states, 154750 states have (on average 1.3780032310177706) internal successors, (213246), 155520 states have internal predecessors, (213246), 15616 states have call successors, (15616), 8699 states have call predecessors, (15616), 8954 states have return successors, (16382), 15102 states have call predecessors, (16382), 15614 states have call successors, (16382) [2022-12-14 15:57:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179321 states to 179321 states and 245244 transitions. [2022-12-14 15:57:42,865 INFO L78 Accepts]: Start accepts. Automaton has 179321 states and 245244 transitions. Word has length 169 [2022-12-14 15:57:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:42,865 INFO L495 AbstractCegarLoop]: Abstraction has 179321 states and 245244 transitions. [2022-12-14 15:57:42,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 15:57:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 179321 states and 245244 transitions. [2022-12-14 15:57:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 15:57:43,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:43,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:43,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:57:43,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 15:57:43,366 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:43,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1902417421, now seen corresponding path program 1 times [2022-12-14 15:57:43,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:43,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217254014] [2022-12-14 15:57:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:43,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 15:57:43,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:43,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217254014] [2022-12-14 15:57:43,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217254014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:57:43,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520903167] [2022-12-14 15:57:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:43,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:43,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:57:43,528 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:57:43,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:57:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:43,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:57:43,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 15:57:43,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:57:43,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520903167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:43,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:57:43,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:57:43,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549122631] [2022-12-14 15:57:43,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:43,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:57:43,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:43,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:57:43,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:57:43,693 INFO L87 Difference]: Start difference. First operand 179321 states and 245244 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:57:56,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:56,584 INFO L93 Difference]: Finished difference Result 417765 states and 581601 transitions. [2022-12-14 15:57:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:56,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 169 [2022-12-14 15:57:56,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:57,302 INFO L225 Difference]: With dead ends: 417765 [2022-12-14 15:57:57,302 INFO L226 Difference]: Without dead ends: 238451 [2022-12-14 15:57:57,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:57:57,565 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 101 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:57,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 383 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:57:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238451 states. [2022-12-14 15:58:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238451 to 198789. [2022-12-14 15:58:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198789 states, 173188 states have (on average 1.4087119199944569) internal successors, (243972), 173960 states have internal predecessors, (243972), 16131 states have call successors, (16131), 9214 states have call predecessors, (16131), 9469 states have return successors, (16897), 15615 states have call predecessors, (16897), 16129 states have call successors, (16897) [2022-12-14 15:58:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198789 states to 198789 states and 277000 transitions. [2022-12-14 15:58:09,240 INFO L78 Accepts]: Start accepts. Automaton has 198789 states and 277000 transitions. Word has length 169 [2022-12-14 15:58:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:09,241 INFO L495 AbstractCegarLoop]: Abstraction has 198789 states and 277000 transitions. [2022-12-14 15:58:09,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:58:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 198789 states and 277000 transitions. [2022-12-14 15:58:09,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 15:58:09,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:09,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:09,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:58:09,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:09,864 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash -275135416, now seen corresponding path program 2 times [2022-12-14 15:58:09,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:09,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980806899] [2022-12-14 15:58:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:09,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 16 proven. 57 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:58:10,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980806899] [2022-12-14 15:58:10,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980806899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861707014] [2022-12-14 15:58:10,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:58:10,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:10,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:10,140 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:10,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:58:10,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:58:10,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:58:10,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:58:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 15:58:10,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:58:10,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861707014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:10,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:58:10,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:58:10,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424349442] [2022-12-14 15:58:10,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:10,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:58:10,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:58:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:58:10,306 INFO L87 Difference]: Start difference. First operand 198789 states and 277000 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:58:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:24,686 INFO L93 Difference]: Finished difference Result 384135 states and 540802 transitions. [2022-12-14 15:58:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:58:24,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 169 [2022-12-14 15:58:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:25,567 INFO L225 Difference]: With dead ends: 384135 [2022-12-14 15:58:25,567 INFO L226 Difference]: Without dead ends: 283651 [2022-12-14 15:58:25,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:58:25,738 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 146 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:25,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 501 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:58:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283651 states. [2022-12-14 15:58:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283651 to 236165. [2022-12-14 15:58:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236165 states, 208516 states have (on average 1.4524161215446296) internal successors, (302852), 209288 states have internal predecessors, (302852), 17155 states have call successors, (17155), 10238 states have call predecessors, (17155), 10493 states have return successors, (17921), 16639 states have call predecessors, (17921), 17153 states have call successors, (17921) [2022-12-14 15:58:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236165 states to 236165 states and 337928 transitions. [2022-12-14 15:58:40,260 INFO L78 Accepts]: Start accepts. Automaton has 236165 states and 337928 transitions. Word has length 169 [2022-12-14 15:58:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:40,261 INFO L495 AbstractCegarLoop]: Abstraction has 236165 states and 337928 transitions. [2022-12-14 15:58:40,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:58:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 236165 states and 337928 transitions. [2022-12-14 15:58:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 15:58:40,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:40,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:40,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:58:40,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:40,946 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash -303789057, now seen corresponding path program 1 times [2022-12-14 15:58:40,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:40,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258889695] [2022-12-14 15:58:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 15:58:41,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:41,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258889695] [2022-12-14 15:58:41,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258889695] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:41,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501914019] [2022-12-14 15:58:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:41,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:41,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:41,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:41,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:58:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:58:41,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:58:41,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:58:41,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501914019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:41,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:58:41,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:58:41,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712294171] [2022-12-14 15:58:41,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:41,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:58:41,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:58:41,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:58:41,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:58:41,397 INFO L87 Difference]: Start difference. First operand 236165 states and 337928 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:02,817 INFO L93 Difference]: Finished difference Result 585077 states and 836534 transitions. [2022-12-14 15:59:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:59:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 170 [2022-12-14 15:59:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:03,724 INFO L225 Difference]: With dead ends: 585077 [2022-12-14 15:59:03,725 INFO L226 Difference]: Without dead ends: 348919 [2022-12-14 15:59:04,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 15:59:04,029 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 573 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:04,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 518 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348919 states. [2022-12-14 15:59:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348919 to 348915. [2022-12-14 15:59:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348915 states, 307710 states have (on average 1.4411426342985278) internal successors, (443454), 308866 states have internal predecessors, (443454), 25469 states have call successors, (25469), 15352 states have call predecessors, (25469), 15735 states have return successors, (26619), 24697 states have call predecessors, (26619), 25467 states have call successors, (26619) [2022-12-14 15:59:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348915 states to 348915 states and 495542 transitions. [2022-12-14 15:59:28,621 INFO L78 Accepts]: Start accepts. Automaton has 348915 states and 495542 transitions. Word has length 170 [2022-12-14 15:59:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:28,621 INFO L495 AbstractCegarLoop]: Abstraction has 348915 states and 495542 transitions. [2022-12-14 15:59:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 348915 states and 495542 transitions. [2022-12-14 15:59:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 15:59:29,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:29,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:29,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:59:29,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 15:59:29,383 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1745608447, now seen corresponding path program 1 times [2022-12-14 15:59:29,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:29,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052621283] [2022-12-14 15:59:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:29,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 15:59:29,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052621283] [2022-12-14 15:59:29,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052621283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:29,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211140130] [2022-12-14 15:59:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:29,692 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:29,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:59:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:59:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 15:59:29,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:29,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211140130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:29,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:29,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:59:29,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322668717] [2022-12-14 15:59:29,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:29,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:59:29,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:29,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:59:29,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:59:29,909 INFO L87 Difference]: Start difference. First operand 348915 states and 495542 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:00:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:00:06,394 INFO L93 Difference]: Finished difference Result 864287 states and 1226432 transitions. [2022-12-14 16:00:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:00:06,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 172 [2022-12-14 16:00:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:00:08,075 INFO L225 Difference]: With dead ends: 864287 [2022-12-14 16:00:08,075 INFO L226 Difference]: Without dead ends: 515379 [2022-12-14 16:00:08,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:00:08,664 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 569 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:00:08,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 513 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:00:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515379 states. [2022-12-14 16:00:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515379 to 515375. [2022-12-14 16:00:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515375 states, 453970 states have (on average 1.429490935524374) internal successors, (648946), 455702 states have internal predecessors, (648946), 37809 states have call successors, (37809), 23020 states have call predecessors, (37809), 23595 states have return successors, (39535), 36653 states have call predecessors, (39535), 37807 states have call successors, (39535) [2022-12-14 16:00:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515375 states to 515375 states and 726290 transitions. [2022-12-14 16:00:45,559 INFO L78 Accepts]: Start accepts. Automaton has 515375 states and 726290 transitions. Word has length 172 [2022-12-14 16:00:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:00:45,559 INFO L495 AbstractCegarLoop]: Abstraction has 515375 states and 726290 transitions. [2022-12-14 16:00:45,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:00:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 515375 states and 726290 transitions. [2022-12-14 16:00:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 16:00:46,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:00:46,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:00:46,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 16:00:46,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 16:00:46,766 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:00:46,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:00:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash -735064321, now seen corresponding path program 1 times [2022-12-14 16:00:46,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:00:46,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786044957] [2022-12-14 16:00:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:46,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:00:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 16:00:46,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:00:46,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786044957] [2022-12-14 16:00:46,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786044957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:00:46,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410139166] [2022-12-14 16:00:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:46,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:46,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:00:46,936 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:00:46,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 16:00:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:47,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:00:47,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:00:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 16:00:47,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:00:47,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410139166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:00:47,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:00:47,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 16:00:47,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241144230] [2022-12-14 16:00:47,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:00:47,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:00:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:00:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:00:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:00:47,131 INFO L87 Difference]: Start difference. First operand 515375 states and 726290 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:01:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:19,501 INFO L93 Difference]: Finished difference Result 926222 states and 1300057 transitions. [2022-12-14 16:01:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:01:19,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 16:01:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:20,628 INFO L225 Difference]: With dead ends: 926222 [2022-12-14 16:01:20,628 INFO L226 Difference]: Without dead ends: 410854 [2022-12-14 16:01:21,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 16:01:21,403 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 694 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:21,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 466 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:01:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410854 states. [2022-12-14 16:01:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410854 to 394488. [2022-12-14 16:01:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394488 states, 347554 states have (on average 1.424549854123388) internal successors, (495108), 348997 states have internal predecessors, (495108), 28511 states have call successors, (28511), 17271 states have call predecessors, (28511), 18422 states have return successors, (29661), 28220 states have call predecessors, (29661), 28509 states have call successors, (29661) [2022-12-14 16:01:51,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394488 states to 394488 states and 553280 transitions. [2022-12-14 16:01:51,048 INFO L78 Accepts]: Start accepts. Automaton has 394488 states and 553280 transitions. Word has length 174 [2022-12-14 16:01:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:51,049 INFO L495 AbstractCegarLoop]: Abstraction has 394488 states and 553280 transitions. [2022-12-14 16:01:51,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:01:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 394488 states and 553280 transitions. [2022-12-14 16:01:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-12-14 16:01:51,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:51,810 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:01:51,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 16:01:52,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 16:01:52,012 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:01:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:52,014 INFO L85 PathProgramCache]: Analyzing trace with hash -814167193, now seen corresponding path program 2 times [2022-12-14 16:01:52,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:01:52,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020904118] [2022-12-14 16:01:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:52,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:01:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:01:52,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:01:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020904118] [2022-12-14 16:01:52,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020904118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:01:52,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21914568] [2022-12-14 16:01:52,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:01:52,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:01:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:01:52,198 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:01:52,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 16:01:52,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 16:01:52,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:01:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:01:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 16:01:52,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:01:52,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21914568] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:01:52,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:01:52,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:01:52,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682653011] [2022-12-14 16:01:52,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:01:52,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:01:52,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:01:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:01:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:01:52,348 INFO L87 Difference]: Start difference. First operand 394488 states and 553280 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:02:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:19,773 INFO L93 Difference]: Finished difference Result 529792 states and 745367 transitions. [2022-12-14 16:02:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 175 [2022-12-14 16:02:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:20,787 INFO L225 Difference]: With dead ends: 529792 [2022-12-14 16:02:20,788 INFO L226 Difference]: Without dead ends: 376152 [2022-12-14 16:02:21,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:02:21,021 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 52 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:21,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 384 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:02:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376152 states. [2022-12-14 16:02:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376152 to 352056. [2022-12-14 16:02:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352056 states, 308578 states have (on average 1.4430192690340853) internal successors, (445284), 309157 states have internal predecessors, (445284), 27359 states have call successors, (27359), 16119 states have call predecessors, (27359), 16118 states have return successors, (27357), 26780 states have call predecessors, (27357), 27357 states have call successors, (27357) [2022-12-14 16:02:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352056 states to 352056 states and 500000 transitions. [2022-12-14 16:02:49,975 INFO L78 Accepts]: Start accepts. Automaton has 352056 states and 500000 transitions. Word has length 175 [2022-12-14 16:02:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:49,975 INFO L495 AbstractCegarLoop]: Abstraction has 352056 states and 500000 transitions. [2022-12-14 16:02:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:02:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 352056 states and 500000 transitions. [2022-12-14 16:02:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-12-14 16:02:50,544 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:50,544 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:50,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 16:02:50,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 16:02:50,745 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:50,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1636454125, now seen corresponding path program 1 times [2022-12-14 16:02:50,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:50,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244546248] [2022-12-14 16:02:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:50,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 16:02:50,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:50,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244546248] [2022-12-14 16:02:50,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244546248] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:50,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212887522] [2022-12-14 16:02:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:50,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:50,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:50,924 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:50,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 16:02:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:51,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:02:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 16:02:51,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:02:51,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212887522] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:51,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:02:51,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:02:51,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888969230] [2022-12-14 16:02:51,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:51,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:02:51,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:51,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:02:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:02:51,145 INFO L87 Difference]: Start difference. First operand 352056 states and 500000 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:03:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:31,073 INFO L93 Difference]: Finished difference Result 870804 states and 1235178 transitions. [2022-12-14 16:03:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:03:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 175 [2022-12-14 16:03:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:32,688 INFO L225 Difference]: With dead ends: 870804 [2022-12-14 16:03:32,688 INFO L226 Difference]: Without dead ends: 518812 [2022-12-14 16:03:33,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:03:33,318 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 633 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:33,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 442 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:03:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518812 states. [2022-12-14 16:04:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518812 to 518808. [2022-12-14 16:04:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518808 states, 454050 states have (on average 1.4291025217487061) internal successors, (648884), 454917 states have internal predecessors, (648884), 40591 states have call successors, (40591), 24167 states have call predecessors, (40591), 24166 states have return successors, (40589), 39724 states have call predecessors, (40589), 40589 states have call successors, (40589) [2022-12-14 16:04:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518808 states to 518808 states and 730064 transitions. [2022-12-14 16:04:15,725 INFO L78 Accepts]: Start accepts. Automaton has 518808 states and 730064 transitions. Word has length 175 [2022-12-14 16:04:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:04:15,725 INFO L495 AbstractCegarLoop]: Abstraction has 518808 states and 730064 transitions. [2022-12-14 16:04:15,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:04:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 518808 states and 730064 transitions. [2022-12-14 16:04:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 16:04:16,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:04:16,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 16:04:16,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 16:04:16,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:04:16,944 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:04:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:04:16,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1897197585, now seen corresponding path program 1 times [2022-12-14 16:04:16,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:04:16,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278985596] [2022-12-14 16:04:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:04:16,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:04:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:04:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 16:04:17,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:04:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278985596] [2022-12-14 16:04:17,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278985596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:04:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170826688] [2022-12-14 16:04:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:04:17,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:04:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:04:17,229 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:04:17,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 16:04:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:04:17,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:04:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:04:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 16:04:17,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:04:17,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170826688] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:04:17,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:04:17,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:04:17,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003248794] [2022-12-14 16:04:17,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:04:17,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:04:17,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:04:17,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:04:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:04:17,366 INFO L87 Difference]: Start difference. First operand 518808 states and 730064 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:05:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:05:08,573 INFO L93 Difference]: Finished difference Result 1007488 states and 1428966 transitions. [2022-12-14 16:05:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:05:08,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 173 [2022-12-14 16:05:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:05:10,566 INFO L225 Difference]: With dead ends: 1007488 [2022-12-14 16:05:10,566 INFO L226 Difference]: Without dead ends: 661836 [2022-12-14 16:05:11,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:05:11,119 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 138 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:05:11,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 495 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:05:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661836 states. [2022-12-14 16:05:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661836 to 602616. [2022-12-14 16:06:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602616 states, 532674 states have (on average 1.452543206539084) internal successors, (773732), 533541 states have internal predecessors, (773732), 43183 states have call successors, (43183), 26759 states have call predecessors, (43183), 26758 states have return successors, (43181), 42316 states have call predecessors, (43181), 43181 states have call successors, (43181) [2022-12-14 16:06:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602616 states to 602616 states and 860096 transitions. [2022-12-14 16:06:02,237 INFO L78 Accepts]: Start accepts. Automaton has 602616 states and 860096 transitions. Word has length 173 [2022-12-14 16:06:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:06:02,237 INFO L495 AbstractCegarLoop]: Abstraction has 602616 states and 860096 transitions. [2022-12-14 16:06:02,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:06:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 602616 states and 860096 transitions. [2022-12-14 16:06:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-12-14 16:06:03,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:06:03,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:06:03,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 16:06:03,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:06:03,720 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:06:03,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:06:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1243506648, now seen corresponding path program 1 times [2022-12-14 16:06:03,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:06:03,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958522842] [2022-12-14 16:06:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:06:03,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:06:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:06:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 16:06:03,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:06:03,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958522842] [2022-12-14 16:06:03,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958522842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:06:03,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061516359] [2022-12-14 16:06:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:06:03,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:06:03,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:06:03,982 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:06:03,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eb354d8-491e-4a93-8055-1c09fa9cf886/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 16:06:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:06:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:06:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:06:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 16:06:04,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:06:04,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061516359] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:06:04,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:06:04,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:06:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489615483] [2022-12-14 16:06:04,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:06:04,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:06:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:06:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:06:04,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:06:04,218 INFO L87 Difference]: Start difference. First operand 602616 states and 860096 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)