./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash b51c0cff1313a9afa802665dd86b8903b503d10a2ec17c034f2e12e418dc81cd --- 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-5e519f3 [2022-11-03 03:47:44,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:47:44,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:47:44,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:47:44,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:47:44,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:47:44,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:47:44,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:47:44,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:47:44,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:47:44,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:47:44,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:47:44,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:47:44,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:47:44,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:47:44,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:47:44,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:47:44,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:47:44,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:47:44,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:47:44,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:47:44,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:47:44,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:47:44,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:47:44,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:47:44,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:47:44,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:47:44,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:47:44,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:47:44,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:47:44,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:47:44,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:47:44,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:47:44,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:47:44,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:47:44,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:47:44,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:47:44,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:47:44,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:47:44,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:47:44,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:47:44,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:47:44,936 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:47:44,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:47:44,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:47:44,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:47:44,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:47:44,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:47:44,939 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:47:44,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:47:44,939 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:47:44,939 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:47:44,940 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:47:44,941 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:47:44,941 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:47:44,941 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:47:44,941 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:47:44,941 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:47:44,942 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:47:44,942 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:47:44,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:47:44,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:47:44,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:47:44,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:47:44,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:47:44,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:47:44,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:47:44,944 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:47:44,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:47:44,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:47:44,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:47:44,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:44,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:47:44,945 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:47:44,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:47:44,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:47:44,946 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:47:44,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:47:44,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:47:44,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:47:44,947 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_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b51c0cff1313a9afa802665dd86b8903b503d10a2ec17c034f2e12e418dc81cd [2022-11-03 03:47:45,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:47:45,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:47:45,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:47:45,270 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:47:45,270 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:47:45,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c [2022-11-03 03:47:45,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data/9fc709bd9/fe5e5602afdc4f49aef7212700e14ef6/FLAGfd1de633e [2022-11-03 03:47:46,027 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:47:46,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c [2022-11-03 03:47:46,043 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data/9fc709bd9/fe5e5602afdc4f49aef7212700e14ef6/FLAGfd1de633e [2022-11-03 03:47:46,209 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data/9fc709bd9/fe5e5602afdc4f49aef7212700e14ef6 [2022-11-03 03:47:46,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:47:46,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:47:46,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:46,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:47:46,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:47:46,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:46" (1/1) ... [2022-11-03 03:47:46,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c9ff0bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:46, skipping insertion in model container [2022-11-03 03:47:46,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:46" (1/1) ... [2022-11-03 03:47:46,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:47:46,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:47:46,560 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c[1014,1027] [2022-11-03 03:47:46,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:46,959 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:47:46,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c[1014,1027] [2022-11-03 03:47:47,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:47,130 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:47:47,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47 WrapperNode [2022-11-03 03:47:47,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:47,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:47,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:47:47,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:47:47,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,582 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2398 [2022-11-03 03:47:47,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:47,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:47:47,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:47:47,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:47:47,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,802 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:47:47,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:47:47,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:47:47,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:47:47,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (1/1) ... [2022-11-03 03:47:47,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:47,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:47,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:47:47,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:47:48,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:47:48,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:47:48,547 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:47:48,549 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:50:11,797 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:50:26,445 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:50:26,445 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:50:26,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:26 BoogieIcfgContainer [2022-11-03 03:50:26,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:50:26,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:50:26,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:50:26,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:50:26,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:46" (1/3) ... [2022-11-03 03:50:26,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f65f316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:50:26, skipping insertion in model container [2022-11-03 03:50:26,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:47" (2/3) ... [2022-11-03 03:50:26,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f65f316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:50:26, skipping insertion in model container [2022-11-03 03:50:26,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:26" (3/3) ... [2022-11-03 03:50:26,456 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lamport.3.prop1-func-interl.c [2022-11-03 03:50:26,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:50:26,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:50:26,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:50:26,533 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;@7eee7ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:50:26,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:50:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:50:26,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:26,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:50:26,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash 9700463, now seen corresponding path program 1 times [2022-11-03 03:50:26,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:26,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012359658] [2022-11-03 03:50:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:26,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:50:27,285 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:50:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:50:27,674 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:50:27,678 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:50:27,681 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:50:27,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:50:27,689 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:50:27,695 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:50:27,748 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:50:27,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:50:27 BoogieIcfgContainer [2022-11-03 03:50:27,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:50:27,782 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:50:27,782 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:50:27,783 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:50:27,784 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:26" (3/4) ... [2022-11-03 03:50:27,789 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:50:27,789 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:50:27,792 INFO L158 Benchmark]: Toolchain (without parser) took 161573.86ms. Allocated memory was 109.1MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 69.7MB in the beginning and 2.1GB in the end (delta: -2.0GB). Peak memory consumption was 485.2MB. Max. memory is 16.1GB. [2022-11-03 03:50:27,792 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:50:27,794 INFO L158 Benchmark]: CACSL2BoogieTranslator took 907.88ms. Allocated memory is still 109.1MB. Free memory was 69.6MB in the beginning and 47.1MB in the end (delta: 22.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-03 03:50:27,796 INFO L158 Benchmark]: Boogie Procedure Inliner took 451.22ms. Allocated memory was 109.1MB in the beginning and 161.5MB in the end (delta: 52.4MB). Free memory was 47.1MB in the beginning and 89.7MB in the end (delta: -42.7MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. [2022-11-03 03:50:27,803 INFO L158 Benchmark]: Boogie Preprocessor took 285.10ms. Allocated memory is still 161.5MB. Free memory was 89.7MB in the beginning and 63.6MB in the end (delta: 26.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-03 03:50:27,804 INFO L158 Benchmark]: RCFGBuilder took 158578.13ms. Allocated memory was 161.5MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 63.6MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2022-11-03 03:50:27,806 INFO L158 Benchmark]: TraceAbstraction took 1329.72ms. Allocated memory is still 2.6GB. Free memory was 2.2GB in the beginning and 2.1GB in the end (delta: 92.3MB). Peak memory consumption was 92.3MB. Max. memory is 16.1GB. [2022-11-03 03:50:27,807 INFO L158 Benchmark]: Witness Printer took 7.36ms. Allocated memory is still 2.6GB. Free memory was 2.1GB in the beginning and 2.1GB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:50:27,816 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 907.88ms. Allocated memory is still 109.1MB. Free memory was 69.6MB in the beginning and 47.1MB in the end (delta: 22.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 451.22ms. Allocated memory was 109.1MB in the beginning and 161.5MB in the end (delta: 52.4MB). Free memory was 47.1MB in the beginning and 89.7MB in the end (delta: -42.7MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 285.10ms. Allocated memory is still 161.5MB. Free memory was 89.7MB in the beginning and 63.6MB in the end (delta: 26.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * RCFGBuilder took 158578.13ms. Allocated memory was 161.5MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 63.6MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. * TraceAbstraction took 1329.72ms. Allocated memory is still 2.6GB. Free memory was 2.2GB in the beginning and 2.1GB in the end (delta: 92.3MB). Peak memory consumption was 92.3MB. Max. memory is 16.1GB. * Witness Printer took 7.36ms. Allocated memory is still 2.6GB. Free memory was 2.1GB in the beginning and 2.1GB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 302, overapproximation of bitwiseAnd at line 213. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_22 = 0; [L39] const SORT_4 var_85 = 1; [L40] const SORT_4 var_86 = 0; [L41] const SORT_2 var_96 = 0; [L42] const SORT_2 var_100 = 1; [L43] const SORT_2 var_124 = 255; [L44] const SORT_2 var_126 = 2; [L45] const SORT_3 var_151 = 0; [L46] const SORT_4 var_320 = 3; [L47] const SORT_2 var_331 = 3; [L49] SORT_1 input_95; [L50] SORT_1 input_97; [L51] SORT_1 input_98; [L52] SORT_1 input_99; [L53] SORT_1 input_106; [L54] SORT_1 input_107; [L55] SORT_1 input_108; [L56] SORT_1 input_109; [L57] SORT_1 input_115; [L58] SORT_1 input_116; [L59] SORT_1 input_117; [L60] SORT_1 input_118; [L61] SORT_1 input_125; [L62] SORT_1 input_127; [L63] SORT_1 input_128; [L64] SORT_1 input_135; [L65] SORT_1 input_136; [L66] SORT_1 input_137; [L67] SORT_1 input_138; [L68] SORT_1 input_139; [L69] SORT_1 input_140; [L70] SORT_1 input_150; [L71] SORT_1 input_158; [L72] SORT_1 input_165; [L73] SORT_1 input_173; [L74] SORT_1 input_175; [L75] SORT_1 input_179; [L76] SORT_1 input_181; [L77] SORT_1 input_190; [L78] SORT_1 input_204; [L79] SORT_1 input_215; [L80] SORT_1 input_217; [L81] SORT_1 input_221; [L82] SORT_1 input_223; [L83] SORT_1 input_232; [L84] SORT_1 input_246; [L85] SORT_1 input_257; [L86] SORT_1 input_259; [L87] SORT_1 input_263; [L88] SORT_1 input_265; [L89] SORT_1 input_274; [L90] SORT_1 input_288; [L92] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L93] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L94] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L95] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L96] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L97] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L98] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L99] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L100] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L102] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L106] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L108] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L109] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L111] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L113] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L117] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L119] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L121] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L122] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L123] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L124] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L125] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L126] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L127] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L128] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L129] SORT_1 state_81 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L130] SORT_1 state_83 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L132] SORT_2 init_7_arg_1 = var_5; [L133] state_6 = init_7_arg_1 [L134] SORT_2 init_9_arg_1 = var_5; [L135] state_8 = init_9_arg_1 [L136] SORT_2 init_11_arg_1 = var_5; [L137] state_10 = init_11_arg_1 [L138] SORT_2 init_13_arg_1 = var_5; [L139] state_12 = init_13_arg_1 [L140] SORT_2 init_15_arg_1 = var_5; [L141] state_14 = init_15_arg_1 [L142] SORT_2 init_17_arg_1 = var_5; [L143] state_16 = init_17_arg_1 [L144] SORT_2 init_19_arg_1 = var_5; [L145] state_18 = init_19_arg_1 [L146] SORT_2 init_21_arg_1 = var_5; [L147] state_20 = init_21_arg_1 [L148] SORT_1 init_24_arg_1 = var_22; [L149] state_23 = init_24_arg_1 [L150] SORT_1 init_26_arg_1 = var_22; [L151] state_25 = init_26_arg_1 [L152] SORT_1 init_28_arg_1 = var_22; [L153] state_27 = init_28_arg_1 [L154] SORT_1 init_30_arg_1 = var_22; [L155] state_29 = init_30_arg_1 [L156] SORT_1 init_32_arg_1 = var_22; [L157] state_31 = init_32_arg_1 [L158] SORT_1 init_34_arg_1 = var_22; [L159] state_33 = init_34_arg_1 [L160] SORT_1 init_36_arg_1 = var_22; [L161] state_35 = init_36_arg_1 [L162] SORT_1 init_38_arg_1 = var_22; [L163] state_37 = init_38_arg_1 [L164] SORT_1 init_40_arg_1 = var_22; [L165] state_39 = init_40_arg_1 [L166] SORT_1 init_42_arg_1 = var_22; [L167] state_41 = init_42_arg_1 [L168] SORT_1 init_44_arg_1 = var_22; [L169] state_43 = init_44_arg_1 [L170] SORT_1 init_46_arg_1 = var_22; [L171] state_45 = init_46_arg_1 [L172] SORT_1 init_48_arg_1 = var_22; [L173] state_47 = init_48_arg_1 [L174] SORT_1 init_50_arg_1 = var_22; [L175] state_49 = init_50_arg_1 [L176] SORT_1 init_52_arg_1 = var_22; [L177] state_51 = init_52_arg_1 [L178] SORT_1 init_54_arg_1 = var_22; [L179] state_53 = init_54_arg_1 [L180] SORT_1 init_56_arg_1 = var_22; [L181] state_55 = init_56_arg_1 [L182] SORT_1 init_58_arg_1 = var_22; [L183] state_57 = init_58_arg_1 [L184] SORT_1 init_60_arg_1 = var_22; [L185] state_59 = init_60_arg_1 [L186] SORT_1 init_62_arg_1 = var_22; [L187] state_61 = init_62_arg_1 [L188] SORT_1 init_64_arg_1 = var_22; [L189] state_63 = init_64_arg_1 [L190] SORT_1 init_66_arg_1 = var_22; [L191] state_65 = init_66_arg_1 [L192] SORT_1 init_68_arg_1 = var_22; [L193] state_67 = init_68_arg_1 [L194] SORT_1 init_70_arg_1 = var_22; [L195] state_69 = init_70_arg_1 [L196] SORT_1 init_72_arg_1 = var_22; [L197] state_71 = init_72_arg_1 [L198] SORT_1 init_74_arg_1 = var_22; [L199] state_73 = init_74_arg_1 [L200] SORT_1 init_76_arg_1 = var_22; [L201] state_75 = init_76_arg_1 [L202] SORT_1 init_78_arg_1 = var_22; [L203] state_77 = init_78_arg_1 [L204] SORT_1 init_80_arg_1 = var_22; [L205] state_79 = init_80_arg_1 [L206] SORT_1 init_82_arg_1 = var_22; [L207] state_81 = init_82_arg_1 [L208] SORT_1 init_84_arg_1 = var_22; [L209] state_83 = init_84_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_68_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_76_arg_1=0, init_78_arg_1=0, init_7_arg_1=0, init_80_arg_1=0, init_82_arg_1=0, init_84_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_23=0, state_25=0, state_27=0, state_29=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_63=0, state_65=0, state_67=0, state_69=0, state_71=0, state_73=0, state_75=0, state_77=0, state_79=0, state_8=0, state_81=0, state_83=0, var_100=1, var_124=255, var_126=2, var_151=0, var_22=0, var_320=3, var_331=3, var_5=0, var_85=1, var_86=0, var_96=0] [L212] input_95 = __VERIFIER_nondet_uchar() [L213] input_95 = input_95 & mask_SORT_1 [L214] input_97 = __VERIFIER_nondet_uchar() [L215] input_97 = input_97 & mask_SORT_1 [L216] input_98 = __VERIFIER_nondet_uchar() [L217] input_98 = input_98 & mask_SORT_1 [L218] input_99 = __VERIFIER_nondet_uchar() [L219] input_99 = input_99 & mask_SORT_1 [L220] input_106 = __VERIFIER_nondet_uchar() [L221] input_106 = input_106 & mask_SORT_1 [L222] input_107 = __VERIFIER_nondet_uchar() [L223] input_107 = input_107 & mask_SORT_1 [L224] input_108 = __VERIFIER_nondet_uchar() [L225] input_108 = input_108 & mask_SORT_1 [L226] input_109 = __VERIFIER_nondet_uchar() [L227] input_109 = input_109 & mask_SORT_1 [L228] input_115 = __VERIFIER_nondet_uchar() [L229] input_115 = input_115 & mask_SORT_1 [L230] input_116 = __VERIFIER_nondet_uchar() [L231] input_116 = input_116 & mask_SORT_1 [L232] input_117 = __VERIFIER_nondet_uchar() [L233] input_117 = input_117 & mask_SORT_1 [L234] input_118 = __VERIFIER_nondet_uchar() [L235] input_118 = input_118 & mask_SORT_1 [L236] input_125 = __VERIFIER_nondet_uchar() [L237] input_125 = input_125 & mask_SORT_1 [L238] input_127 = __VERIFIER_nondet_uchar() [L239] input_127 = input_127 & mask_SORT_1 [L240] input_128 = __VERIFIER_nondet_uchar() [L241] input_128 = input_128 & mask_SORT_1 [L242] input_135 = __VERIFIER_nondet_uchar() [L243] input_135 = input_135 & mask_SORT_1 [L244] input_136 = __VERIFIER_nondet_uchar() [L245] input_136 = input_136 & mask_SORT_1 [L246] input_137 = __VERIFIER_nondet_uchar() [L247] input_137 = input_137 & mask_SORT_1 [L248] input_138 = __VERIFIER_nondet_uchar() [L249] input_138 = input_138 & mask_SORT_1 [L250] input_139 = __VERIFIER_nondet_uchar() [L251] input_139 = input_139 & mask_SORT_1 [L252] input_140 = __VERIFIER_nondet_uchar() [L253] input_140 = input_140 & mask_SORT_1 [L254] input_150 = __VERIFIER_nondet_uchar() [L255] input_150 = input_150 & mask_SORT_1 [L256] input_158 = __VERIFIER_nondet_uchar() [L257] input_158 = input_158 & mask_SORT_1 [L258] input_165 = __VERIFIER_nondet_uchar() [L259] input_165 = input_165 & mask_SORT_1 [L260] input_173 = __VERIFIER_nondet_uchar() [L261] input_175 = __VERIFIER_nondet_uchar() [L262] input_179 = __VERIFIER_nondet_uchar() [L263] input_181 = __VERIFIER_nondet_uchar() [L264] input_190 = __VERIFIER_nondet_uchar() [L265] input_204 = __VERIFIER_nondet_uchar() [L266] input_215 = __VERIFIER_nondet_uchar() [L267] input_217 = __VERIFIER_nondet_uchar() [L268] input_221 = __VERIFIER_nondet_uchar() [L269] input_223 = __VERIFIER_nondet_uchar() [L270] input_232 = __VERIFIER_nondet_uchar() [L271] input_246 = __VERIFIER_nondet_uchar() [L272] input_257 = __VERIFIER_nondet_uchar() [L273] input_259 = __VERIFIER_nondet_uchar() [L274] input_263 = __VERIFIER_nondet_uchar() [L275] input_265 = __VERIFIER_nondet_uchar() [L276] input_274 = __VERIFIER_nondet_uchar() [L277] input_288 = __VERIFIER_nondet_uchar() [L280] SORT_1 var_87_arg_0 = state_25; [L281] SORT_4 var_87_arg_1 = var_85; [L282] SORT_4 var_87_arg_2 = var_86; [L283] EXPR var_87_arg_0 ? var_87_arg_1 : var_87_arg_2 [L283] SORT_4 var_87 = var_87_arg_0 ? var_87_arg_1 : var_87_arg_2; [L284] SORT_1 var_88_arg_0 = state_45; [L285] SORT_4 var_88_arg_1 = var_85; [L286] SORT_4 var_88_arg_2 = var_86; [L287] EXPR var_88_arg_0 ? var_88_arg_1 : var_88_arg_2 [L287] SORT_4 var_88 = var_88_arg_0 ? var_88_arg_1 : var_88_arg_2; [L288] SORT_4 var_89_arg_0 = var_87; [L289] SORT_4 var_89_arg_1 = var_88; [L290] SORT_4 var_89 = var_89_arg_0 + var_89_arg_1; [L291] SORT_1 var_90_arg_0 = state_65; [L292] SORT_4 var_90_arg_1 = var_85; [L293] SORT_4 var_90_arg_2 = var_86; [L294] EXPR var_90_arg_0 ? var_90_arg_1 : var_90_arg_2 [L294] SORT_4 var_90 = var_90_arg_0 ? var_90_arg_1 : var_90_arg_2; [L295] SORT_4 var_91_arg_0 = var_89; [L296] SORT_4 var_91_arg_1 = var_90; [L297] SORT_4 var_91 = var_91_arg_0 + var_91_arg_1; [L298] var_91 = var_91 & mask_SORT_4 [L299] SORT_4 var_92_arg_0 = var_91; [L300] SORT_4 var_92_arg_1 = var_85; [L301] SORT_1 var_92 = var_92_arg_0 <= var_92_arg_1; [L302] SORT_1 var_93_arg_0 = ~state_83; [L303] var_93_arg_0 = var_93_arg_0 & mask_SORT_1 [L304] SORT_1 var_93_arg_1 = ~var_92; [L305] var_93_arg_1 = var_93_arg_1 & mask_SORT_1 [L306] SORT_1 var_93 = var_93_arg_0 & var_93_arg_1; [L307] var_93 = var_93 & mask_SORT_1 [L308] SORT_1 bad_94_arg_0 = var_93; [L309] CALL __VERIFIER_assert(!(bad_94_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 03:50:27,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash b51c0cff1313a9afa802665dd86b8903b503d10a2ec17c034f2e12e418dc81cd --- 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-5e519f3 [2022-11-03 03:50:30,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:50:30,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:50:30,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:50:30,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:50:30,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:50:30,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:50:30,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:50:30,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:50:30,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:50:30,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:50:30,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:50:30,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:50:30,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:50:30,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:50:30,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:50:30,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:50:30,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:50:30,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:50:30,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:50:30,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:50:30,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:50:30,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:50:30,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:50:30,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:50:30,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:50:30,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:50:30,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:50:30,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:50:30,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:50:30,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:50:30,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:50:30,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:50:30,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:50:30,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:50:30,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:50:30,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:50:30,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:50:30,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:50:30,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:50:30,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:50:30,544 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:50:30,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:50:30,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:50:30,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:50:30,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:50:30,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:50:30,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:50:30,599 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:50:30,599 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:50:30,599 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:50:30,600 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:50:30,601 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:50:30,601 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:50:30,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:50:30,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:50:30,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:50:30,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:50:30,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:50:30,604 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:50:30,604 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:50:30,604 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:50:30,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:50:30,605 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:50:30,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:50:30,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:50:30,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:50:30,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:50:30,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:50:30,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:50:30,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:50:30,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:50:30,607 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:50:30,607 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:30,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:50:30,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:50:30,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:50:30,608 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b51c0cff1313a9afa802665dd86b8903b503d10a2ec17c034f2e12e418dc81cd [2022-11-03 03:50:30,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:50:30,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:50:31,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:50:31,003 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:50:31,004 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:50:31,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c [2022-11-03 03:50:31,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data/0e04a3a0d/891bc2222dcf4015a271d63bb7ad6bce/FLAG4c08a1b3f [2022-11-03 03:50:31,837 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:50:31,837 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c [2022-11-03 03:50:31,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data/0e04a3a0d/891bc2222dcf4015a271d63bb7ad6bce/FLAG4c08a1b3f [2022-11-03 03:50:32,036 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/data/0e04a3a0d/891bc2222dcf4015a271d63bb7ad6bce [2022-11-03 03:50:32,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:50:32,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:50:32,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:50:32,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:50:32,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:50:32,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:32,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de35fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32, skipping insertion in model container [2022-11-03 03:50:32,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:32,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:50:32,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:50:32,305 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c[1014,1027] [2022-11-03 03:50:32,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:50:32,747 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:50:32,758 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.3.prop1-func-interl.c[1014,1027] [2022-11-03 03:50:32,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:50:32,938 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:50:32,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32 WrapperNode [2022-11-03 03:50:32,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:50:32,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:50:32,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:50:32,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:50:32,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:32,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,160 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2398 [2022-11-03 03:50:33,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:50:33,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:50:33,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:50:33,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:50:33,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,287 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:50:33,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:50:33,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:50:33,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:50:33,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (1/1) ... [2022-11-03 03:50:33,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:50:33,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:33,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:50:33,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:50:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:50:33,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:50:34,213 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:50:34,227 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:50:37,143 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:50:37,157 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:50:37,158 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:50:37,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:37 BoogieIcfgContainer [2022-11-03 03:50:37,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:50:37,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:50:37,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:50:37,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:50:37,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:50:32" (1/3) ... [2022-11-03 03:50:37,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c48ac5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:50:37, skipping insertion in model container [2022-11-03 03:50:37,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:32" (2/3) ... [2022-11-03 03:50:37,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c48ac5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:50:37, skipping insertion in model container [2022-11-03 03:50:37,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:37" (3/3) ... [2022-11-03 03:50:37,175 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lamport.3.prop1-func-interl.c [2022-11-03 03:50:37,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:50:37,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:50:37,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:50:37,315 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;@5583440e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:50:37,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:50:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:50:37,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:37,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:37,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:37,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 03:50:37,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:37,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813803326] [2022-11-03 03:50:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:37,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:37,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:37,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:37,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:50:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:38,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:38,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:38,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:38,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813803326] [2022-11-03 03:50:38,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813803326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:38,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:38,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:38,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868529373] [2022-11-03 03:50:38,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:38,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:38,302 INFO L87 Difference]: Start difference. First operand has 83 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:38,731 INFO L93 Difference]: Finished difference Result 313 states and 467 transitions. [2022-11-03 03:50:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:38,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:50:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:38,750 INFO L225 Difference]: With dead ends: 313 [2022-11-03 03:50:38,750 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 03:50:38,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:38,759 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 331 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:38,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 439 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:50:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 03:50:38,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 81. [2022-11-03 03:50:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 117 transitions. [2022-11-03 03:50:38,821 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 117 transitions. Word has length 11 [2022-11-03 03:50:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:38,822 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 117 transitions. [2022-11-03 03:50:38,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 117 transitions. [2022-11-03 03:50:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:50:38,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:38,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:38,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:39,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:39,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:39,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2011974963, now seen corresponding path program 1 times [2022-11-03 03:50:39,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:39,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998970102] [2022-11-03 03:50:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:39,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:39,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:39,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:39,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:50:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:39,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:39,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:39,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:39,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998970102] [2022-11-03 03:50:39,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998970102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:39,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:39,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:39,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114378322] [2022-11-03 03:50:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:39,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:39,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:39,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:39,759 INFO L87 Difference]: Start difference. First operand 81 states and 117 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:40,175 INFO L93 Difference]: Finished difference Result 309 states and 451 transitions. [2022-11-03 03:50:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:40,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:50:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:40,181 INFO L225 Difference]: With dead ends: 309 [2022-11-03 03:50:40,181 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 03:50:40,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:40,183 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 325 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:40,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 438 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:50:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 03:50:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 83. [2022-11-03 03:50:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.451219512195122) internal successors, (119), 82 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2022-11-03 03:50:40,196 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 11 [2022-11-03 03:50:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:40,196 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2022-11-03 03:50:40,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2022-11-03 03:50:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:50:40,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:40,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:40,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:40,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:40,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2069233265, now seen corresponding path program 1 times [2022-11-03 03:50:40,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:40,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584887879] [2022-11-03 03:50:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:40,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:40,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:40,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:40,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:50:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:41,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:41,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:41,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:41,063 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584887879] [2022-11-03 03:50:41,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584887879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:41,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:41,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:41,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179064647] [2022-11-03 03:50:41,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:41,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:41,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:41,074 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:41,383 INFO L93 Difference]: Finished difference Result 309 states and 450 transitions. [2022-11-03 03:50:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:50:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:41,390 INFO L225 Difference]: With dead ends: 309 [2022-11-03 03:50:41,390 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 03:50:41,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:41,392 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 319 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:41,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 440 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:50:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 03:50:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 85. [2022-11-03 03:50:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-11-03 03:50:41,402 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 11 [2022-11-03 03:50:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:41,402 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-11-03 03:50:41,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-11-03 03:50:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:50:41,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:41,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:41,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:41,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:41,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:41,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 03:50:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:41,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548665823] [2022-11-03 03:50:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:41,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:41,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:41,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:41,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:50:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:50:42,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:42,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:42,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548665823] [2022-11-03 03:50:42,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548665823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:42,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:42,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:50:42,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870796608] [2022-11-03 03:50:42,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:42,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:50:42,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:42,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:50:42,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:50:42,648 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:44,233 INFO L93 Difference]: Finished difference Result 333 states and 481 transitions. [2022-11-03 03:50:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:50:44,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:50:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:44,236 INFO L225 Difference]: With dead ends: 333 [2022-11-03 03:50:44,236 INFO L226 Difference]: Without dead ends: 331 [2022-11-03 03:50:44,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:50:44,238 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 982 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:44,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 1051 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:50:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-03 03:50:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 91. [2022-11-03 03:50:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4333333333333333) internal successors, (129), 90 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 129 transitions. [2022-11-03 03:50:44,249 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 129 transitions. Word has length 11 [2022-11-03 03:50:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:44,249 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 129 transitions. [2022-11-03 03:50:44,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 129 transitions. [2022-11-03 03:50:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:50:44,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:44,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:44,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-03 03:50:44,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:44,469 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1941024301, now seen corresponding path program 1 times [2022-11-03 03:50:44,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:44,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894134654] [2022-11-03 03:50:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:44,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:44,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:44,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:44,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:50:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:45,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:50:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:46,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:46,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:46,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894134654] [2022-11-03 03:50:46,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894134654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:46,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:46,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:50:46,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250376219] [2022-11-03 03:50:46,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:46,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:50:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:50:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:50:46,179 INFO L87 Difference]: Start difference. First operand 91 states and 129 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:46,415 INFO L93 Difference]: Finished difference Result 220 states and 318 transitions. [2022-11-03 03:50:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:50:46,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:50:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:46,417 INFO L225 Difference]: With dead ends: 220 [2022-11-03 03:50:46,418 INFO L226 Difference]: Without dead ends: 137 [2022-11-03 03:50:46,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:50:46,419 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 80 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:46,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 540 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-03 03:50:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-03 03:50:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-03 03:50:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.4411764705882353) internal successors, (196), 136 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2022-11-03 03:50:46,428 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 86 [2022-11-03 03:50:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:46,429 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2022-11-03 03:50:46,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2022-11-03 03:50:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:50:46,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:46,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:46,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:46,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:46,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2013410859, now seen corresponding path program 1 times [2022-11-03 03:50:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:46,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154984293] [2022-11-03 03:50:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:46,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:46,654 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:46,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:50:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:50:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:48,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:48,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:48,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154984293] [2022-11-03 03:50:48,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154984293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:48,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:48,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:48,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797224643] [2022-11-03 03:50:48,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:48,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:48,409 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:48,777 INFO L93 Difference]: Finished difference Result 363 states and 527 transitions. [2022-11-03 03:50:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:48,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:50:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:48,782 INFO L225 Difference]: With dead ends: 363 [2022-11-03 03:50:48,782 INFO L226 Difference]: Without dead ends: 280 [2022-11-03 03:50:48,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:48,784 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 171 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:48,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 417 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:50:48,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-03 03:50:48,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 187. [2022-11-03 03:50:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.4516129032258065) internal successors, (270), 186 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:48,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 270 transitions. [2022-11-03 03:50:48,798 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 270 transitions. Word has length 86 [2022-11-03 03:50:48,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:48,799 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 270 transitions. [2022-11-03 03:50:48,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 270 transitions. [2022-11-03 03:50:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:50:48,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:48,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:48,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:49,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:49,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1858854611, now seen corresponding path program 1 times [2022-11-03 03:50:49,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:49,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56653447] [2022-11-03 03:50:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:49,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:49,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:49,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:49,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:50:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:50:50,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:50,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:50,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:50,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56653447] [2022-11-03 03:50:50,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56653447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:50,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:50,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:50,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950021915] [2022-11-03 03:50:50,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:50,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:50,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:50,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:50,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:50,777 INFO L87 Difference]: Start difference. First operand 187 states and 270 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:51,124 INFO L93 Difference]: Finished difference Result 363 states and 526 transitions. [2022-11-03 03:50:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:50:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:51,130 INFO L225 Difference]: With dead ends: 363 [2022-11-03 03:50:51,130 INFO L226 Difference]: Without dead ends: 280 [2022-11-03 03:50:51,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:51,131 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 160 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:51,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 416 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:50:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-03 03:50:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 191. [2022-11-03 03:50:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.4473684210526316) internal successors, (275), 190 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2022-11-03 03:50:51,143 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 86 [2022-11-03 03:50:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:51,143 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2022-11-03 03:50:51,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2022-11-03 03:50:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:50:51,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:51,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:51,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:51,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:51,365 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash 847764783, now seen corresponding path program 1 times [2022-11-03 03:50:51,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:51,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209701250] [2022-11-03 03:50:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:51,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:51,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:51,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:51,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:50:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:52,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:50:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:52,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:52,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:52,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209701250] [2022-11-03 03:50:52,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209701250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:52,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:52,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:50:52,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090701062] [2022-11-03 03:50:52,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:52,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:52,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:52,947 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:53,401 INFO L93 Difference]: Finished difference Result 358 states and 518 transitions. [2022-11-03 03:50:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:53,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:50:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:53,405 INFO L225 Difference]: With dead ends: 358 [2022-11-03 03:50:53,405 INFO L226 Difference]: Without dead ends: 275 [2022-11-03 03:50:53,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:50:53,408 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 256 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:53,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 480 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:50:53,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-03 03:50:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 193. [2022-11-03 03:50:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4427083333333333) internal successors, (277), 192 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 277 transitions. [2022-11-03 03:50:53,419 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 277 transitions. Word has length 86 [2022-11-03 03:50:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:53,420 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 277 transitions. [2022-11-03 03:50:53,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 277 transitions. [2022-11-03 03:50:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:50:53,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:53,422 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:53,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:53,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:53,634 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:53,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2127628461, now seen corresponding path program 1 times [2022-11-03 03:50:53,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:53,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520045987] [2022-11-03 03:50:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:53,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:53,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:53,639 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:53,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:50:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:54,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:50:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:55,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:55,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:55,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520045987] [2022-11-03 03:50:55,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520045987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:55,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:55,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552009131] [2022-11-03 03:50:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:55,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:55,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:55,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:55,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:55,263 INFO L87 Difference]: Start difference. First operand 193 states and 277 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:55,618 INFO L93 Difference]: Finished difference Result 363 states and 524 transitions. [2022-11-03 03:50:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:55,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:50:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:55,622 INFO L225 Difference]: With dead ends: 363 [2022-11-03 03:50:55,622 INFO L226 Difference]: Without dead ends: 280 [2022-11-03 03:50:55,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:55,624 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 147 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:55,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 413 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:50:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-03 03:50:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 195. [2022-11-03 03:50:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.4381443298969072) internal successors, (279), 194 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 279 transitions. [2022-11-03 03:50:55,635 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 279 transitions. Word has length 86 [2022-11-03 03:50:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:55,636 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 279 transitions. [2022-11-03 03:50:55,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 279 transitions. [2022-11-03 03:50:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:50:55,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:55,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:55,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:55,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:55,853 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1540822447, now seen corresponding path program 1 times [2022-11-03 03:50:55,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:55,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819895418] [2022-11-03 03:50:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:55,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:55,858 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:55,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:50:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:50:57,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:57,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:58,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819895418] [2022-11-03 03:50:58,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819895418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:58,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2036247105] [2022-11-03 03:50:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:58,602 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:58,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:58,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:58,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 03:51:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:00,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:51:00,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:01,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:01,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2036247105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:01,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674386712] [2022-11-03 03:51:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:01,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:01,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:01,579 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:01,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:51:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:02,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:51:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:03,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:04,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674386712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:04,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:04,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 03:51:04,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478829534] [2022-11-03 03:51:04,508 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:04,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 03:51:04,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:04,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 03:51:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:51:04,511 INFO L87 Difference]: Start difference. First operand 195 states and 279 transitions. Second operand has 28 states, 28 states have (on average 11.535714285714286) internal successors, (323), 28 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:05,098 INFO L93 Difference]: Finished difference Result 331 states and 473 transitions. [2022-11-03 03:51:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:51:05,099 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 11.535714285714286) internal successors, (323), 28 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:51:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:05,101 INFO L225 Difference]: With dead ends: 331 [2022-11-03 03:51:05,101 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 03:51:05,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 484 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:51:05,103 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 287 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:05,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1670 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-11-03 03:51:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 03:51:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2022-11-03 03:51:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.4225941422594142) internal successors, (340), 239 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 340 transitions. [2022-11-03 03:51:05,114 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 340 transitions. Word has length 86 [2022-11-03 03:51:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:05,114 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 340 transitions. [2022-11-03 03:51:05,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.535714285714286) internal successors, (323), 28 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 340 transitions. [2022-11-03 03:51:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:51:05,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:05,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:05,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:05,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:05,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:05,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:05,735 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:05,736 INFO L85 PathProgramCache]: Analyzing trace with hash 731475821, now seen corresponding path program 1 times [2022-11-03 03:51:05,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:05,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64965261] [2022-11-03 03:51:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:05,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:05,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:05,739 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:05,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:51:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:51:06,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:07,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:08,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:08,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64965261] [2022-11-03 03:51:08,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64965261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1228887704] [2022-11-03 03:51:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:08,429 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:08,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:08,433 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:08,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 03:51:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:10,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:51:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:11,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:11,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1228887704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:11,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853920428] [2022-11-03 03:51:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:11,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:11,645 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:11,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:51:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:12,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:51:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:13,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:13,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853920428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:13,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:13,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:51:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76547759] [2022-11-03 03:51:13,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:13,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:51:13,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:13,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:51:13,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:51:13,626 INFO L87 Difference]: Start difference. First operand 240 states and 340 transitions. Second operand has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:14,021 INFO L93 Difference]: Finished difference Result 364 states and 517 transitions. [2022-11-03 03:51:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:51:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:51:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:14,025 INFO L225 Difference]: With dead ends: 364 [2022-11-03 03:51:14,025 INFO L226 Difference]: Without dead ends: 281 [2022-11-03 03:51:14,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 493 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:51:14,026 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 245 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:14,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 927 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-03 03:51:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-03 03:51:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-11-03 03:51:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.4071428571428573) internal successors, (394), 280 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 394 transitions. [2022-11-03 03:51:14,041 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 394 transitions. Word has length 86 [2022-11-03 03:51:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:14,041 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 394 transitions. [2022-11-03 03:51:14,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 394 transitions. [2022-11-03 03:51:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:51:14,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:14,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:14,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:14,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:14,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:14,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:14,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:14,659 INFO L85 PathProgramCache]: Analyzing trace with hash 788734123, now seen corresponding path program 1 times [2022-11-03 03:51:14,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:14,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921581257] [2022-11-03 03:51:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:14,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:14,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:14,663 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:14,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:51:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:15,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:51:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:16,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:17,213 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:17,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921581257] [2022-11-03 03:51:17,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921581257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:17,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1200494890] [2022-11-03 03:51:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:17,214 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:17,216 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:17,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 03:51:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:19,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:51:19,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:19,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:20,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1200494890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:20,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138659147] [2022-11-03 03:51:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:20,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:20,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:20,445 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:20,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:51:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:21,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:51:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:21,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:22,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138659147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:22,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:22,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:51:22,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852410608] [2022-11-03 03:51:22,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:22,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:51:22,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:51:22,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:51:22,473 INFO L87 Difference]: Start difference. First operand 281 states and 394 transitions. Second operand has 16 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:22,813 INFO L93 Difference]: Finished difference Result 524 states and 732 transitions. [2022-11-03 03:51:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:51:22,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:51:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:22,817 INFO L225 Difference]: With dead ends: 524 [2022-11-03 03:51:22,817 INFO L226 Difference]: Without dead ends: 441 [2022-11-03 03:51:22,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 492 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:22,818 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 258 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:22,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1836 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-11-03 03:51:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-03 03:51:22,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 380. [2022-11-03 03:51:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.3746701846965699) internal successors, (521), 379 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 521 transitions. [2022-11-03 03:51:22,834 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 521 transitions. Word has length 86 [2022-11-03 03:51:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:22,834 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 521 transitions. [2022-11-03 03:51:22,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 521 transitions. [2022-11-03 03:51:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:51:22,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:22,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:22,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:23,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:23,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:23,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:23,452 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash -55271379, now seen corresponding path program 1 times [2022-11-03 03:51:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:23,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693791610] [2022-11-03 03:51:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:23,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:23,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:23,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:23,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:51:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:24,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 03:51:24,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:26,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:33,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:33,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693791610] [2022-11-03 03:51:33,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693791610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:33,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1742840279] [2022-11-03 03:51:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:33,408 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:33,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:33,417 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:33,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 03:51:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 03:51:35,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:37,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:56,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1742840279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:56,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358520778] [2022-11-03 03:52:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:56,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:56,995 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:56,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 03:52:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:57,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:52:57,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:53:00,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:53:06,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358520778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:06,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:06,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 11, 11] total 49 [2022-11-03 03:53:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844073844] [2022-11-03 03:53:06,493 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:06,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 03:53:06,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 03:53:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2031, Unknown=34, NotChecked=0, Total=2352 [2022-11-03 03:53:06,495 INFO L87 Difference]: Start difference. First operand 380 states and 521 transitions. Second operand has 49 states, 49 states have (on average 8.408163265306122) internal successors, (412), 49 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:13,298 INFO L93 Difference]: Finished difference Result 725 states and 993 transitions. [2022-11-03 03:53:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 03:53:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 8.408163265306122) internal successors, (412), 49 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:53:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:13,302 INFO L225 Difference]: With dead ends: 725 [2022-11-03 03:53:13,302 INFO L226 Difference]: Without dead ends: 723 [2022-11-03 03:53:13,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 471 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 96.6s TimeCoverageRelationStatistics Valid=669, Invalid=4409, Unknown=34, NotChecked=0, Total=5112 [2022-11-03 03:53:13,306 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 420 mSDsluCounter, 2837 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:13,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 2931 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2022-11-03 03:53:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-11-03 03:53:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 704. [2022-11-03 03:53:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 1.3769559032716927) internal successors, (968), 703 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 968 transitions. [2022-11-03 03:53:13,339 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 968 transitions. Word has length 86 [2022-11-03 03:53:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:13,339 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 968 transitions. [2022-11-03 03:53:13,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 8.408163265306122) internal successors, (412), 49 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:13,340 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 968 transitions. [2022-11-03 03:53:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:53:13,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:13,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:13,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:13,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:13,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-03 03:53:13,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:13,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:13,959 INFO L85 PathProgramCache]: Analyzing trace with hash 297817003, now seen corresponding path program 1 times [2022-11-03 03:53:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:13,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013281826] [2022-11-03 03:53:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:13,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:13,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:13,963 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:13,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:53:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:14,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:53:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:16,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:23,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013281826] [2022-11-03 03:53:23,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013281826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:23,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [362683083] [2022-11-03 03:53:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:23,704 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:23,705 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:23,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 03:53:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:25,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:53:25,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:26,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:26,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [362683083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:26,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385689708] [2022-11-03 03:54:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:26,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:26,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:26,189 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:26,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 03:54:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:54:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:54:28,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:54:33,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385689708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:33,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:33,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 03:54:33,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777229538] [2022-11-03 03:54:33,038 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:33,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:54:33,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:33,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:54:33,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1328, Unknown=29, NotChecked=0, Total=1560 [2022-11-03 03:54:33,041 INFO L87 Difference]: Start difference. First operand 704 states and 968 transitions. Second operand has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:36,732 INFO L93 Difference]: Finished difference Result 1375 states and 1884 transitions. [2022-11-03 03:54:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:54:36,742 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:54:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:36,747 INFO L225 Difference]: With dead ends: 1375 [2022-11-03 03:54:36,747 INFO L226 Difference]: Without dead ends: 1373 [2022-11-03 03:54:36,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 478 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 71.7s TimeCoverageRelationStatistics Valid=518, Invalid=2993, Unknown=29, NotChecked=0, Total=3540 [2022-11-03 03:54:36,749 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 494 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:36,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 2158 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 61 Unchecked, 0.0s Time] [2022-11-03 03:54:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-11-03 03:54:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1336. [2022-11-03 03:54:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 1.3767790262172284) internal successors, (1838), 1335 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1838 transitions. [2022-11-03 03:54:36,820 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1838 transitions. Word has length 86 [2022-11-03 03:54:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:36,820 INFO L495 AbstractCegarLoop]: Abstraction has 1336 states and 1838 transitions. [2022-11-03 03:54:36,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1838 transitions. [2022-11-03 03:54:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:54:36,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:36,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:36,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:37,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:37,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:37,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:37,443 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:37,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1507621331, now seen corresponding path program 1 times [2022-11-03 03:54:37,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:37,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833466987] [2022-11-03 03:54:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:37,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:37,448 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:37,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:54:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:54:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:40,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:53,196 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:53,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833466987] [2022-11-03 03:54:53,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833466987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:53,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [925180998] [2022-11-03 03:54:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:53,196 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:53,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:53,198 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:53,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 03:54:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:55,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:54:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:56,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:55:47,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [925180998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:47,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685359986] [2022-11-03 03:55:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:47,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:47,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:47,273 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:55:47,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 03:55:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:48,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:55:48,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:55:50,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:55:54,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685359986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:54,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:55:54,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 03:55:54,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862940944] [2022-11-03 03:55:54,850 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:55:54,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:55:54,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:55:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1328, Unknown=26, NotChecked=0, Total=1560 [2022-11-03 03:55:54,853 INFO L87 Difference]: Start difference. First operand 1336 states and 1838 transitions. Second operand has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:59,832 INFO L93 Difference]: Finished difference Result 2677 states and 3672 transitions. [2022-11-03 03:55:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:55:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:55:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:59,843 INFO L225 Difference]: With dead ends: 2677 [2022-11-03 03:55:59,843 INFO L226 Difference]: Without dead ends: 2675 [2022-11-03 03:55:59,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 478 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 70.4s TimeCoverageRelationStatistics Valid=521, Invalid=2993, Unknown=26, NotChecked=0, Total=3540 [2022-11-03 03:55:59,848 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 694 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:59,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 2334 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-11-03 03:55:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-11-03 03:55:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2608. [2022-11-03 03:55:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2607 states have (on average 1.3770617568085923) internal successors, (3590), 2607 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 3590 transitions. [2022-11-03 03:55:59,977 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 3590 transitions. Word has length 86 [2022-11-03 03:55:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:59,978 INFO L495 AbstractCegarLoop]: Abstraction has 2608 states and 3590 transitions. [2022-11-03 03:55:59,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 3590 transitions. [2022-11-03 03:55:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:55:59,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:59,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:00,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:00,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:00,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:00,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:00,601 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash -848089809, now seen corresponding path program 1 times [2022-11-03 03:56:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:00,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202311880] [2022-11-03 03:56:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:00,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:00,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:00,604 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:00,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:56:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:01,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:56:01,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:03,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:12,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:12,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202311880] [2022-11-03 03:56:12,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202311880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:12,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417644697] [2022-11-03 03:56:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:12,958 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:12,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:12,961 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:12,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 03:56:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:56:14,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:16,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:21,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1417644697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:21,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995592076] [2022-11-03 03:57:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:21,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:21,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:21,595 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:21,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 03:57:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:22,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:57:22,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:57:25,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:57:32,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995592076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:32,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:32,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 03:57:32,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299290882] [2022-11-03 03:57:32,552 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:32,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:57:32,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:32,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:57:32,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1328, Unknown=29, NotChecked=0, Total=1560 [2022-11-03 03:57:32,555 INFO L87 Difference]: Start difference. First operand 2608 states and 3590 transitions. Second operand has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:38,449 INFO L93 Difference]: Finished difference Result 3937 states and 5334 transitions. [2022-11-03 03:57:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:57:38,450 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:57:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:38,462 INFO L225 Difference]: With dead ends: 3937 [2022-11-03 03:57:38,462 INFO L226 Difference]: Without dead ends: 3935 [2022-11-03 03:57:38,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 477 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 84.7s TimeCoverageRelationStatistics Valid=518, Invalid=2993, Unknown=29, NotChecked=0, Total=3540 [2022-11-03 03:57:38,465 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 460 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 2333 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:38,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 2333 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 65 Unchecked, 0.0s Time] [2022-11-03 03:57:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2022-11-03 03:57:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3808. [2022-11-03 03:57:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 1.3606514315734173) internal successors, (5180), 3807 states have internal predecessors, (5180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5180 transitions. [2022-11-03 03:57:38,684 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5180 transitions. Word has length 86 [2022-11-03 03:57:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:38,684 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5180 transitions. [2022-11-03 03:57:38,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5180 transitions. [2022-11-03 03:57:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:57:38,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:38,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:38,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:38,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:39,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:39,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:39,315 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:39,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1950833361, now seen corresponding path program 1 times [2022-11-03 03:57:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:39,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342405204] [2022-11-03 03:57:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:39,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:39,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:39,319 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:39,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:57:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:40,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:57:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:40,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:40,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:40,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342405204] [2022-11-03 03:57:40,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342405204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:40,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:40,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:57:40,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697630749] [2022-11-03 03:57:40,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:57:40,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:40,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:57:40,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:57:40,567 INFO L87 Difference]: Start difference. First operand 3808 states and 5180 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:41,220 INFO L93 Difference]: Finished difference Result 6229 states and 8217 transitions. [2022-11-03 03:57:41,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:57:41,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:57:41,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:41,236 INFO L225 Difference]: With dead ends: 6229 [2022-11-03 03:57:41,236 INFO L226 Difference]: Without dead ends: 5493 [2022-11-03 03:57:41,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:57:41,239 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 109 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:41,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 987 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-11-03 03:57:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2022-11-03 03:57:41,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 3808. [2022-11-03 03:57:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 1.354347255056475) internal successors, (5156), 3807 states have internal predecessors, (5156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5156 transitions. [2022-11-03 03:57:41,465 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5156 transitions. Word has length 86 [2022-11-03 03:57:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:41,466 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5156 transitions. [2022-11-03 03:57:41,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5156 transitions. [2022-11-03 03:57:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:57:41,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:41,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:41,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:41,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:41,699 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:41,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1810284751, now seen corresponding path program 1 times [2022-11-03 03:57:41,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:41,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971367397] [2022-11-03 03:57:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:41,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:41,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:41,703 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:41,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:57:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:42,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:57:42,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:44,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:53,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971367397] [2022-11-03 03:57:53,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971367397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:53,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143761882] [2022-11-03 03:57:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:53,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:53,313 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:53,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 03:57:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:57:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:57,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:06,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143761882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:06,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725488538] [2022-11-03 03:59:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:06,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:06,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:06,739 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:06,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 03:59:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:07,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:59:07,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:59:10,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:59:17,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725488538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:17,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:59:17,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 03:59:17,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72657582] [2022-11-03 03:59:17,640 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:17,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:59:17,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:17,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:59:17,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1325, Unknown=32, NotChecked=0, Total=1560 [2022-11-03 03:59:17,644 INFO L87 Difference]: Start difference. First operand 3808 states and 5156 transitions. Second operand has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:23,522 INFO L93 Difference]: Finished difference Result 4801 states and 6450 transitions. [2022-11-03 03:59:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:59:23,523 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 03:59:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:23,531 INFO L225 Difference]: With dead ends: 4801 [2022-11-03 03:59:23,531 INFO L226 Difference]: Without dead ends: 4799 [2022-11-03 03:59:23,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 477 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 86.6s TimeCoverageRelationStatistics Valid=518, Invalid=2990, Unknown=32, NotChecked=0, Total=3540 [2022-11-03 03:59:23,533 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 540 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:23,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 2290 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-11-03 03:59:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2022-11-03 03:59:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 4672. [2022-11-03 03:59:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 1.347891243845001) internal successors, (6296), 4671 states have internal predecessors, (6296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 6296 transitions. [2022-11-03 03:59:23,815 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 6296 transitions. Word has length 86 [2022-11-03 03:59:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:23,816 INFO L495 AbstractCegarLoop]: Abstraction has 4672 states and 6296 transitions. [2022-11-03 03:59:23,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 6296 transitions. [2022-11-03 03:59:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:59:23,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:23,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:23,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:24,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:24,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:24,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:24,437 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:24,438 INFO L85 PathProgramCache]: Analyzing trace with hash 679244211, now seen corresponding path program 1 times [2022-11-03 03:59:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:24,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227546572] [2022-11-03 03:59:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:24,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:24,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:24,440 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:24,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:59:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:59:25,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:27,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:37,639 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:37,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227546572] [2022-11-03 03:59:37,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227546572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:37,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1706107117] [2022-11-03 03:59:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:37,640 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:59:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:59:37,641 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:59:37,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 03:59:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:39,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:59:39,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:41,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:43,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1706107117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:43,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048635729] [2022-11-03 04:00:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:43,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:43,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:43,636 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:43,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 04:00:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:44,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:00:44,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:00:47,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:00:53,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048635729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:53,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:00:53,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 04:00:53,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962645207] [2022-11-03 04:00:53,595 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:53,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 04:00:53,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:53,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 04:00:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1328, Unknown=29, NotChecked=0, Total=1560 [2022-11-03 04:00:53,598 INFO L87 Difference]: Start difference. First operand 4672 states and 6296 transitions. Second operand has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:59,622 INFO L93 Difference]: Finished difference Result 6913 states and 9249 transitions. [2022-11-03 04:00:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 04:00:59,623 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 04:00:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:59,639 INFO L225 Difference]: With dead ends: 6913 [2022-11-03 04:00:59,639 INFO L226 Difference]: Without dead ends: 6911 [2022-11-03 04:00:59,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 477 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 80.2s TimeCoverageRelationStatistics Valid=518, Invalid=2993, Unknown=29, NotChecked=0, Total=3540 [2022-11-03 04:00:59,642 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 582 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:59,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 2404 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2022-11-03 04:00:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2022-11-03 04:01:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 6664. [2022-11-03 04:01:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6664 states, 6663 states have (on average 1.3433888638751312) internal successors, (8951), 6663 states have internal predecessors, (8951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6664 states to 6664 states and 8951 transitions. [2022-11-03 04:01:00,039 INFO L78 Accepts]: Start accepts. Automaton has 6664 states and 8951 transitions. Word has length 86 [2022-11-03 04:01:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:00,040 INFO L495 AbstractCegarLoop]: Abstraction has 6664 states and 8951 transitions. [2022-11-03 04:01:00,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 10.3) internal successors, (412), 40 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6664 states and 8951 transitions. [2022-11-03 04:01:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 04:01:00,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:00,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:00,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:00,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:00,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:00,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:00,665 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:00,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:00,665 INFO L85 PathProgramCache]: Analyzing trace with hash 770056503, now seen corresponding path program 1 times [2022-11-03 04:01:00,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:00,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418756231] [2022-11-03 04:01:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:00,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:00,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:00,668 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:00,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 04:01:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 04:01:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:04,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:10,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:10,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418756231] [2022-11-03 04:01:10,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418756231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:10,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532769449] [2022-11-03 04:01:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:10,388 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:10,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:10,389 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:10,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e71a0-fbc2-4a1c-812d-1ae1903a4d63/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 04:01:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:12,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 04:01:12,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:14,446 INFO L328 TraceCheckSpWp]: Computing backward predicates...