./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/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 c936dc57c77d69420d30086d462b35a7caa8e1e68cd109cc22e0b9f8298d81b3 --- 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 01:41:02,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:41:02,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:41:02,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:41:02,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:41:02,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:41:02,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:41:02,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:41:02,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:41:02,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:41:02,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:41:02,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:41:02,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:41:02,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:41:02,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:41:02,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:41:02,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:41:02,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:41:02,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:41:02,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:41:02,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:41:02,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:41:02,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:41:02,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:41:02,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:41:02,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:41:02,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:41:02,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:41:02,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:41:02,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:41:02,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:41:02,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:41:02,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:41:02,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:41:02,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:41:02,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:41:02,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:41:02,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:41:02,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:41:02,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:41:02,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:41:02,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:41:02,507 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:41:02,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:41:02,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:41:02,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:41:02,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:41:02,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:41:02,509 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:41:02,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:41:02,510 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:41:02,510 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:41:02,511 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:41:02,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:41:02,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:41:02,511 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:41:02,512 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:41:02,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:41:02,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:41:02,513 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:41:02,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:41:02,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:41:02,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:41:02,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:41:02,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:41:02,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:41:02,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:41:02,516 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:41:02,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:41:02,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:41:02,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:41:02,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:02,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:41:02,517 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:41:02,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:41:02,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:41:02,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:41:02,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:41:02,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:41:02,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:41:02,519 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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c936dc57c77d69420d30086d462b35a7caa8e1e68cd109cc22e0b9f8298d81b3 [2022-11-03 01:41:02,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:41:02,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:41:02,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:41:02,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:41:02,879 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:41:02,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c [2022-11-03 01:41:03,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data/2751d92dd/6dde8a1be61a474e87bcefec26e40701/FLAGbb540bd1e [2022-11-03 01:41:03,723 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:41:03,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c [2022-11-03 01:41:03,747 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data/2751d92dd/6dde8a1be61a474e87bcefec26e40701/FLAGbb540bd1e [2022-11-03 01:41:04,032 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data/2751d92dd/6dde8a1be61a474e87bcefec26e40701 [2022-11-03 01:41:04,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:41:04,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:41:04,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:04,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:41:04,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:41:04,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b35d9a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04, skipping insertion in model container [2022-11-03 01:41:04,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:41:04,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:41:04,347 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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c[1107,1120] [2022-11-03 01:41:04,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:04,531 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:41:04,547 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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c[1107,1120] [2022-11-03 01:41:04,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:04,634 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:41:04,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04 WrapperNode [2022-11-03 01:41:04,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:04,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:04,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:41:04,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:41:04,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,718 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 259 [2022-11-03 01:41:04,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:04,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:41:04,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:41:04,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:41:04,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,796 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:41:04,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:41:04,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:41:04,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:41:04,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:04,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:04,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:41:04,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:41:04,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:41:04,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:41:05,077 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:41:05,080 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:41:05,709 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:41:06,343 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:41:06,343 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:41:06,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:06 BoogieIcfgContainer [2022-11-03 01:41:06,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:41:06,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:41:06,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:41:06,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:41:06,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:41:04" (1/3) ... [2022-11-03 01:41:06,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b965445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:06, skipping insertion in model container [2022-11-03 01:41:06,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (2/3) ... [2022-11-03 01:41:06,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b965445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:06, skipping insertion in model container [2022-11-03 01:41:06,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:06" (3/3) ... [2022-11-03 01:41:06,356 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_spinner32.c [2022-11-03 01:41:06,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:41:06,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:41:06,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:41:06,446 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;@7be9d356, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:41:06,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:41:06,451 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 01:41:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:41:06,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:06,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:41:06,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash 4091395, now seen corresponding path program 1 times [2022-11-03 01:41:06,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:06,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955068378] [2022-11-03 01:41:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:06,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:41:06,640 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:41:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:41:06,787 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:41:06,791 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:41:06,794 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:41:06,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:41:06,801 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:41:06,806 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:41:06,838 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:41:06,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:41:06 BoogieIcfgContainer [2022-11-03 01:41:06,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:41:06,852 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:41:06,852 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:41:06,852 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:41:06,853 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:06" (3/4) ... [2022-11-03 01:41:06,857 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:41:06,858 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:41:06,860 INFO L158 Benchmark]: Toolchain (without parser) took 2822.24ms. Allocated memory was 138.4MB in the beginning and 182.5MB in the end (delta: 44.0MB). Free memory was 104.6MB in the beginning and 147.3MB in the end (delta: -42.6MB). Peak memory consumption was 2.4MB. Max. memory is 16.1GB. [2022-11-03 01:41:06,861 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 98.6MB. Free memory was 54.9MB in the beginning and 54.8MB in the end (delta: 36.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:41:06,862 INFO L158 Benchmark]: CACSL2BoogieTranslator took 595.40ms. Allocated memory is still 138.4MB. Free memory was 104.4MB in the beginning and 109.2MB in the end (delta: -4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:41:06,863 INFO L158 Benchmark]: Boogie Procedure Inliner took 94.39ms. Allocated memory is still 138.4MB. Free memory was 109.2MB in the beginning and 105.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 01:41:06,869 INFO L158 Benchmark]: Boogie Preprocessor took 78.94ms. Allocated memory is still 138.4MB. Free memory was 105.0MB in the beginning and 102.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:41:06,870 INFO L158 Benchmark]: RCFGBuilder took 1534.77ms. Allocated memory is still 138.4MB. Free memory was 102.5MB in the beginning and 76.4MB in the end (delta: 26.0MB). Peak memory consumption was 44.2MB. Max. memory is 16.1GB. [2022-11-03 01:41:06,872 INFO L158 Benchmark]: TraceAbstraction took 501.21ms. Allocated memory was 138.4MB in the beginning and 182.5MB in the end (delta: 44.0MB). Free memory was 75.9MB in the beginning and 147.3MB in the end (delta: -71.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:41:06,872 INFO L158 Benchmark]: Witness Printer took 6.91ms. Allocated memory is still 182.5MB. Free memory was 147.3MB in the beginning and 147.3MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:41:06,880 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 98.6MB. Free memory was 54.9MB in the beginning and 54.8MB in the end (delta: 36.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 595.40ms. Allocated memory is still 138.4MB. Free memory was 104.4MB in the beginning and 109.2MB in the end (delta: -4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 94.39ms. Allocated memory is still 138.4MB. Free memory was 109.2MB in the beginning and 105.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.94ms. Allocated memory is still 138.4MB. Free memory was 105.0MB in the beginning and 102.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1534.77ms. Allocated memory is still 138.4MB. Free memory was 102.5MB in the beginning and 76.4MB in the end (delta: 26.0MB). Peak memory consumption was 44.2MB. Max. memory is 16.1GB. * TraceAbstraction took 501.21ms. Allocated memory was 138.4MB in the beginning and 182.5MB in the end (delta: 44.0MB). Free memory was 75.9MB in the beginning and 147.3MB in the end (delta: -71.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.91ms. Allocated memory is still 182.5MB. Free memory was 147.3MB in the beginning and 147.3MB in the end (delta: 2.6kB). There was no memory consumed. 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 100, overapproximation of bitwiseAnd at line 93. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 5); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (5 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 1); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (1 - 1); [L31] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 32); [L32] const SORT_5 msb_SORT_5 = (SORT_5)1 << (32 - 1); [L34] const SORT_25 mask_SORT_25 = (SORT_25)-1 >> (sizeof(SORT_25) * 8 - 31); [L35] const SORT_25 msb_SORT_25 = (SORT_25)1 << (31 - 1); [L37] const SORT_35 mask_SORT_35 = (SORT_35)-1 >> (sizeof(SORT_35) * 8 - 30); [L38] const SORT_35 msb_SORT_35 = (SORT_35)1 << (30 - 1); [L40] const SORT_37 mask_SORT_37 = (SORT_37)-1 >> (sizeof(SORT_37) * 8 - 29); [L41] const SORT_37 msb_SORT_37 = (SORT_37)1 << (29 - 1); [L43] const SORT_43 mask_SORT_43 = (SORT_43)-1 >> (sizeof(SORT_43) * 8 - 2); [L44] const SORT_43 msb_SORT_43 = (SORT_43)1 << (2 - 1); [L46] const SORT_49 mask_SORT_49 = (SORT_49)-1 >> (sizeof(SORT_49) * 8 - 28); [L47] const SORT_49 msb_SORT_49 = (SORT_49)1 << (28 - 1); [L49] const SORT_51 mask_SORT_51 = (SORT_51)-1 >> (sizeof(SORT_51) * 8 - 26); [L50] const SORT_51 msb_SORT_51 = (SORT_51)1 << (26 - 1); [L52] const SORT_57 mask_SORT_57 = (SORT_57)-1 >> (sizeof(SORT_57) * 8 - 4); [L53] const SORT_57 msb_SORT_57 = (SORT_57)1 << (4 - 1); [L55] const SORT_63 mask_SORT_63 = (SORT_63)-1 >> (sizeof(SORT_63) * 8 - 24); [L56] const SORT_63 msb_SORT_63 = (SORT_63)1 << (24 - 1); [L58] const SORT_65 mask_SORT_65 = (SORT_65)-1 >> (sizeof(SORT_65) * 8 - 20); [L59] const SORT_65 msb_SORT_65 = (SORT_65)1 << (20 - 1); [L61] const SORT_71 mask_SORT_71 = (SORT_71)-1 >> (sizeof(SORT_71) * 8 - 8); [L62] const SORT_71 msb_SORT_71 = (SORT_71)1 << (8 - 1); [L64] const SORT_77 mask_SORT_77 = (SORT_77)-1 >> (sizeof(SORT_77) * 8 - 16); [L65] const SORT_77 msb_SORT_77 = (SORT_77)1 << (16 - 1); [L67] const SORT_5 var_8 = 0; [L68] const SORT_5 var_11 = 2863311530; [L69] const SORT_3 var_15 = 1; [L70] const SORT_3 var_22 = 0; [L72] SORT_1 input_2; [L73] SORT_3 input_4; [L74] SORT_5 input_6; [L75] SORT_3 input_7; [L77] SORT_5 state_9 = __VERIFIER_nondet_uint() & mask_SORT_5; [L78] SORT_5 state_19 = __VERIFIER_nondet_uint() & mask_SORT_5; [L79] SORT_3 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L81] SORT_5 init_10_arg_1 = var_8; [L82] state_9 = init_10_arg_1 [L83] SORT_5 init_20_arg_1 = var_8; [L84] state_19 = init_20_arg_1 [L85] SORT_3 init_24_arg_1 = var_22; [L86] state_23 = init_24_arg_1 VAL [init_10_arg_1=0, init_20_arg_1=0, init_24_arg_1=0, mask_SORT_1=31, mask_SORT_25=4294967295, mask_SORT_3=1, mask_SORT_35=4294967295, mask_SORT_37=4294967295, mask_SORT_43=3, mask_SORT_49=4294967295, mask_SORT_5=4294967295, mask_SORT_51=4294967295, mask_SORT_57=15, mask_SORT_63=4294967295, mask_SORT_65=4294967295, mask_SORT_71=255, mask_SORT_77=65535, msb_SORT_1=16, msb_SORT_25=1073741824, msb_SORT_3=1, msb_SORT_35=536870912, msb_SORT_37=268435456, msb_SORT_43=2, msb_SORT_49=134217728, msb_SORT_5=2147483648, msb_SORT_51=33554432, msb_SORT_57=8, msb_SORT_63=8388608, msb_SORT_65=524288, msb_SORT_71=128, msb_SORT_77=32768, state_19=0, state_23=0, state_9=0, var_11=2863311530, var_15=1, var_22=0, var_8=0] [L89] input_2 = __VERIFIER_nondet_uchar() [L90] input_4 = __VERIFIER_nondet_uchar() [L91] input_6 = __VERIFIER_nondet_uint() [L92] input_7 = __VERIFIER_nondet_uchar() [L93] input_7 = input_7 & mask_SORT_3 [L96] SORT_5 var_12_arg_0 = state_9; [L97] SORT_5 var_12_arg_1 = var_11; [L98] SORT_3 var_12 = var_12_arg_0 != var_12_arg_1; [L99] SORT_3 var_16_arg_0 = var_12; [L100] SORT_3 var_16 = ~var_16_arg_0; [L101] SORT_3 var_17_arg_0 = var_15; [L102] SORT_3 var_17_arg_1 = var_16; [L103] SORT_3 var_17 = var_17_arg_0 & var_17_arg_1; [L104] var_17 = var_17 & mask_SORT_3 [L105] SORT_3 bad_18_arg_0 = var_17; [L106] CALL __VERIFIER_assert(!(bad_18_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: 0.4s, 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, 0.1s 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 01:41:06,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/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 c936dc57c77d69420d30086d462b35a7caa8e1e68cd109cc22e0b9f8298d81b3 --- 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 01:41:09,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:41:09,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:41:09,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:41:09,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:41:09,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:41:09,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:41:09,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:41:09,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:41:09,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:41:09,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:41:09,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:41:09,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:41:09,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:41:09,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:41:09,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:41:09,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:41:09,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:41:09,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:41:09,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:41:09,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:41:09,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:41:09,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:41:09,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:41:09,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:41:09,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:41:09,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:41:09,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:41:09,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:41:09,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:41:09,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:41:09,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:41:09,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:41:09,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:41:09,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:41:09,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:41:09,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:41:09,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:41:09,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:41:09,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:41:09,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:41:09,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:41:09,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:41:09,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:41:09,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:41:09,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:41:09,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:41:09,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:41:09,985 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:41:09,985 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:41:09,985 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:41:09,985 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:41:09,986 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:41:09,986 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:41:09,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:41:09,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:41:09,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:41:09,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:41:09,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:41:09,988 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:41:09,989 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:41:09,989 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:41:09,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:41:09,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:41:09,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:41:09,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:41:09,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:41:09,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:41:09,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:09,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:41:09,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:41:09,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:41:09,991 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:41:09,992 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:09,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:41:09,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:41:09,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:41:09,993 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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c936dc57c77d69420d30086d462b35a7caa8e1e68cd109cc22e0b9f8298d81b3 [2022-11-03 01:41:10,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:41:10,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:41:10,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:41:10,458 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:41:10,466 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:41:10,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c [2022-11-03 01:41:10,556 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data/01a259520/cf1ec29ec4514cb3a51328019697424c/FLAGe746bb665 [2022-11-03 01:41:11,152 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:41:11,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c [2022-11-03 01:41:11,165 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data/01a259520/cf1ec29ec4514cb3a51328019697424c/FLAGe746bb665 [2022-11-03 01:41:11,474 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/data/01a259520/cf1ec29ec4514cb3a51328019697424c [2022-11-03 01:41:11,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:41:11,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:41:11,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:11,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:41:11,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:41:11,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:11" (1/1) ... [2022-11-03 01:41:11,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f22db82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:11, skipping insertion in model container [2022-11-03 01:41:11,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:11" (1/1) ... [2022-11-03 01:41:11,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:41:11,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:41:11,715 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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c[1107,1120] [2022-11-03 01:41:11,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:11,893 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:41:11,923 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_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_spinner32.c[1107,1120] [2022-11-03 01:41:12,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:12,071 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:41:12,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12 WrapperNode [2022-11-03 01:41:12,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:12,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:12,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:41:12,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:41:12,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,152 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 259 [2022-11-03 01:41:12,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:12,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:41:12,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:41:12,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:41:12,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,228 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:41:12,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:41:12,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:41:12,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:41:12,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (1/1) ... [2022-11-03 01:41:12,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:12,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:12,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:41:12,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:41:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:41:12,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:41:12,558 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:41:12,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:41:13,127 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:41:13,136 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:41:13,137 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:41:13,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:13 BoogieIcfgContainer [2022-11-03 01:41:13,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:41:13,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:41:13,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:41:13,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:41:13,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:41:11" (1/3) ... [2022-11-03 01:41:13,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c41b439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:13, skipping insertion in model container [2022-11-03 01:41:13,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:12" (2/3) ... [2022-11-03 01:41:13,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c41b439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:13, skipping insertion in model container [2022-11-03 01:41:13,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:13" (3/3) ... [2022-11-03 01:41:13,155 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_spinner32.c [2022-11-03 01:41:13,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:41:13,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:41:13,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:41:13,291 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;@32663cb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:41:13,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:41:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 32 states have internal predecessors, (46), 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 01:41:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:41:13,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:13,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:41:13,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:13,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:13,346 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 01:41:13,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:13,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617469900] [2022-11-03 01:41:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:13,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:13,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:13,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:13,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:41:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:13,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:41:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:13,948 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 01:41:13,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:13,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617469900] [2022-11-03 01:41:13,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617469900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:13,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:13,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:41:13,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874503333] [2022-11-03 01:41:13,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:13,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:13,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:14,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:14,017 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 32 states have internal predecessors, (46), 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 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 01:41:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:14,154 INFO L93 Difference]: Finished difference Result 86 states and 129 transitions. [2022-11-03 01:41:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:14,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-11-03 01:41:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:14,183 INFO L225 Difference]: With dead ends: 86 [2022-11-03 01:41:14,184 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 01:41:14,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:41:14,197 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:14,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 107 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 01:41:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-11-03 01:41:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 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 01:41:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-11-03 01:41:14,277 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 5 [2022-11-03 01:41:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:14,278 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-11-03 01:41:14,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 01:41:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-11-03 01:41:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:41:14,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:14,282 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:14,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:14,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:14,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1346494011, now seen corresponding path program 1 times [2022-11-03 01:41:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:14,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171104883] [2022-11-03 01:41:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:14,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:14,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:14,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:14,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:41:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:14,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:14,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:14,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171104883] [2022-11-03 01:41:14,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171104883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:14,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:14,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:41:14,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504625135] [2022-11-03 01:41:14,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:14,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:41:14,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:41:14,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:14,886 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 01:41:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:14,956 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2022-11-03 01:41:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:41:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 30 [2022-11-03 01:41:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:14,959 INFO L225 Difference]: With dead ends: 62 [2022-11-03 01:41:14,960 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 01:41:14,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:14,963 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:14,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 168 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-11-03 01:41:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 01:41:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-03 01:41:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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 01:41:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-11-03 01:41:14,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 30 [2022-11-03 01:41:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:14,979 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-11-03 01:41:14,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 01:41:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-11-03 01:41:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:41:14,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:14,984 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:15,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:15,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:15,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:15,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1143034951, now seen corresponding path program 1 times [2022-11-03 01:41:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:15,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772274442] [2022-11-03 01:41:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:15,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:15,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:15,206 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:15,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:41:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:15,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:15,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:15,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:15,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772274442] [2022-11-03 01:41:15,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772274442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:15,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:15,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:41:15,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953309181] [2022-11-03 01:41:15,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:15,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:41:15,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:41:15,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:15,787 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 01:41:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:15,918 INFO L93 Difference]: Finished difference Result 114 states and 157 transitions. [2022-11-03 01:41:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:41:15,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 30 [2022-11-03 01:41:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:15,922 INFO L225 Difference]: With dead ends: 114 [2022-11-03 01:41:15,923 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 01:41:15,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:41:15,927 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 82 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:15,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 268 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-11-03 01:41:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 01:41:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2022-11-03 01:41:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 52 states have internal predecessors, (73), 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 01:41:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-11-03 01:41:15,949 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 30 [2022-11-03 01:41:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:15,950 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-11-03 01:41:15,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 01:41:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-11-03 01:41:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:41:15,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:15,954 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:15,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:16,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:16,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:16,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:16,174 INFO L85 PathProgramCache]: Analyzing trace with hash 631972411, now seen corresponding path program 1 times [2022-11-03 01:41:16,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:16,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144096586] [2022-11-03 01:41:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:16,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:16,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:16,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:16,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:41:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:41:16,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:16,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:16,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:16,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144096586] [2022-11-03 01:41:16,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144096586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:16,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:16,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:41:16,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282260881] [2022-11-03 01:41:16,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:16,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:16,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:16,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:16,494 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 01:41:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:16,538 INFO L93 Difference]: Finished difference Result 111 states and 154 transitions. [2022-11-03 01:41:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:16,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 30 [2022-11-03 01:41:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:16,548 INFO L225 Difference]: With dead ends: 111 [2022-11-03 01:41:16,549 INFO L226 Difference]: Without dead ends: 84 [2022-11-03 01:41:16,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 01:41:16,554 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 49 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:16,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 144 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:16,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-03 01:41:16,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2022-11-03 01:41:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 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 01:41:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-11-03 01:41:16,576 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 30 [2022-11-03 01:41:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:16,577 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-11-03 01:41:16,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 01:41:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-11-03 01:41:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:41:16,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:16,580 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:16,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:16,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:16,796 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:16,797 INFO L85 PathProgramCache]: Analyzing trace with hash 633819453, now seen corresponding path program 1 times [2022-11-03 01:41:16,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:16,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852371138] [2022-11-03 01:41:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:16,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:16,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:16,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:16,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:41:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 01:41:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:18,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:22,724 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852371138] [2022-11-03 01:41:22,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852371138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:22,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [775250946] [2022-11-03 01:41:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:22,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:22,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:41:22,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:41:22,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 01:41:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:23,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 01:41:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:24,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:30,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [775250946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:30,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52218334] [2022-11-03 01:41:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:30,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:30,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:30,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:30,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:41:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:30,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 01:41:30,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:36,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:34,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52218334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:34,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:42:34,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18, 18, 27, 27] total 102 [2022-11-03 01:42:34,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314968117] [2022-11-03 01:42:34,349 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:34,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-03 01:42:34,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-03 01:42:34,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=9843, Unknown=18, NotChecked=0, Total=10302 [2022-11-03 01:42:34,361 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 102 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 102 states have internal predecessors, (145), 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 01:42:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:59,496 INFO L93 Difference]: Finished difference Result 283 states and 375 transitions. [2022-11-03 01:42:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-03 01:42:59,496 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 102 states have internal predecessors, (145), 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 30 [2022-11-03 01:42:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:59,499 INFO L225 Difference]: With dead ends: 283 [2022-11-03 01:42:59,499 INFO L226 Difference]: Without dead ends: 281 [2022-11-03 01:42:59,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7359 ImplicationChecksByTransitivity, 98.1s TimeCoverageRelationStatistics Valid=1363, Invalid=28373, Unknown=20, NotChecked=0, Total=29756 [2022-11-03 01:42:59,509 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 508 mSDsluCounter, 5347 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 5454 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2668 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:59,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 5454 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 183 Invalid, 0 Unknown, 2668 Unchecked, 0.4s Time] [2022-11-03 01:42:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-03 01:42:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 100. [2022-11-03 01:42:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.404040404040404) internal successors, (139), 99 states have internal predecessors, (139), 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 01:42:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 139 transitions. [2022-11-03 01:42:59,524 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 139 transitions. Word has length 30 [2022-11-03 01:42:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:59,525 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 139 transitions. [2022-11-03 01:42:59,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 102 states have internal predecessors, (145), 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 01:42:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 139 transitions. [2022-11-03 01:42:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:42:59,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:59,527 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:59,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:59,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:59,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:00,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:00,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:00,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1821246279, now seen corresponding path program 1 times [2022-11-03 01:43:00,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:00,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721459539] [2022-11-03 01:43:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:00,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:00,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:00,133 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:00,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:43:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:00,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 01:43:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:01,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:06,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:06,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721459539] [2022-11-03 01:43:06,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721459539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:06,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [630440722] [2022-11-03 01:43:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:06,045 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:06,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:06,049 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:06,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 01:43:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:06,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 01:43:06,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:54,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:05,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [630440722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:05,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328400503] [2022-11-03 01:44:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:05,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:05,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:05,842 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:05,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:44:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 01:44:05,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:25,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:11,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328400503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:11,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:45:11,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20, 20, 27, 27] total 114 [2022-11-03 01:45:11,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721725068] [2022-11-03 01:45:11,962 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:11,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-11-03 01:45:11,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-11-03 01:45:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=12352, Unknown=30, NotChecked=0, Total=12882 [2022-11-03 01:45:11,967 INFO L87 Difference]: Start difference. First operand 100 states and 139 transitions. Second operand has 114 states, 114 states have (on average 1.4035087719298245) internal successors, (160), 114 states have internal predecessors, (160), 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 01:46:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:14,550 INFO L93 Difference]: Finished difference Result 317 states and 424 transitions. [2022-11-03 01:46:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-03 01:46:14,550 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.4035087719298245) internal successors, (160), 114 states have internal predecessors, (160), 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 30 [2022-11-03 01:46:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:14,559 INFO L225 Difference]: With dead ends: 317 [2022-11-03 01:46:14,559 INFO L226 Difference]: Without dead ends: 315 [2022-11-03 01:46:14,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7596 ImplicationChecksByTransitivity, 190.6s TimeCoverageRelationStatistics Valid=2918, Invalid=30358, Unknown=30, NotChecked=0, Total=33306 [2022-11-03 01:46:14,567 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1130 mSDsluCounter, 4142 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 4183 SdHoareTripleChecker+Invalid, 3441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3076 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:14,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1130 Valid, 4183 Invalid, 3441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 289 Invalid, 0 Unknown, 3076 Unchecked, 0.5s Time] [2022-11-03 01:46:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-03 01:46:14,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 108. [2022-11-03 01:46:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.411214953271028) internal successors, (151), 107 states have internal predecessors, (151), 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 01:46:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 151 transitions. [2022-11-03 01:46:14,584 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 151 transitions. Word has length 30 [2022-11-03 01:46:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:14,584 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 151 transitions. [2022-11-03 01:46:14,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.4035087719298245) internal successors, (160), 114 states have internal predecessors, (160), 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 01:46:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 151 transitions. [2022-11-03 01:46:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:46:14,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:14,586 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:14,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:14,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:15,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:15,201 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash -633044931, now seen corresponding path program 1 times [2022-11-03 01:46:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:15,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550647438] [2022-11-03 01:46:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:15,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:15,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:15,203 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:15,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:46:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:15,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:46:15,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:15,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:15,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:15,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550647438] [2022-11-03 01:46:15,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550647438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:15,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:15,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:46:15,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253756751] [2022-11-03 01:46:15,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:15,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:46:15,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:46:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:46:15,446 INFO L87 Difference]: Start difference. First operand 108 states and 151 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 01:46:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:15,511 INFO L93 Difference]: Finished difference Result 209 states and 281 transitions. [2022-11-03 01:46:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:46:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 30 [2022-11-03 01:46:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:15,517 INFO L225 Difference]: With dead ends: 209 [2022-11-03 01:46:15,517 INFO L226 Difference]: Without dead ends: 161 [2022-11-03 01:46:15,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:46:15,518 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 70 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:15,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 259 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-03 01:46:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-03 01:46:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 104. [2022-11-03 01:46:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3980582524271845) internal successors, (144), 103 states have internal predecessors, (144), 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 01:46:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2022-11-03 01:46:15,529 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 30 [2022-11-03 01:46:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:15,529 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2022-11-03 01:46:15,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 01:46:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2022-11-03 01:46:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:46:15,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:15,531 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:15,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:15,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:15,749 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:15,749 INFO L85 PathProgramCache]: Analyzing trace with hash 748078017, now seen corresponding path program 1 times [2022-11-03 01:46:15,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:15,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283958282] [2022-11-03 01:46:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:15,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:15,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:15,752 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:15,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:46:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 01:46:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:17,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:44,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:44,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283958282] [2022-11-03 01:46:44,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283958282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1514577263] [2022-11-03 01:46:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:44,918 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:44,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:46:44,921 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:46:44,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 01:46:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:45,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 01:46:45,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:52,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:02,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1514577263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:02,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502347114] [2022-11-03 01:47:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:02,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:02,124 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:02,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:47:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:02,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 01:47:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:09,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:13,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502347114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:13,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:48:13,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18, 18, 27, 27] total 110 [2022-11-03 01:48:13,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732718464] [2022-11-03 01:48:13,964 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:13,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-03 01:48:13,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:13,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-03 01:48:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=11456, Unknown=34, NotChecked=0, Total=11990 [2022-11-03 01:48:13,968 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand has 110 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 110 states have internal predecessors, (160), 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 01:48:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:50,235 INFO L93 Difference]: Finished difference Result 270 states and 347 transitions. [2022-11-03 01:48:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-03 01:48:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 110 states have internal predecessors, (160), 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 30 [2022-11-03 01:48:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:50,237 INFO L225 Difference]: With dead ends: 270 [2022-11-03 01:48:50,238 INFO L226 Difference]: Without dead ends: 268 [2022-11-03 01:48:50,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7129 ImplicationChecksByTransitivity, 151.2s TimeCoverageRelationStatistics Valid=2321, Invalid=28442, Unknown=37, NotChecked=0, Total=30800 [2022-11-03 01:48:50,242 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 735 mSDsluCounter, 3324 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1968 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:50,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 3379 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 146 Invalid, 0 Unknown, 1968 Unchecked, 0.3s Time] [2022-11-03 01:48:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-03 01:48:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 124. [2022-11-03 01:48:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3983739837398375) internal successors, (172), 123 states have internal predecessors, (172), 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 01:48:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2022-11-03 01:48:50,264 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 30 [2022-11-03 01:48:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:50,264 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2022-11-03 01:48:50,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 110 states have internal predecessors, (160), 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 01:48:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2022-11-03 01:48:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:48:50,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:50,266 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:50,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:50,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:50,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:50,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:50,867 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:50,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1706987715, now seen corresponding path program 1 times [2022-11-03 01:48:50,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:50,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702056854] [2022-11-03 01:48:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:50,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:50,870 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:50,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:48:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:50,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 01:48:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:52,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:55,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:55,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702056854] [2022-11-03 01:48:55,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702056854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1419545270] [2022-11-03 01:48:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:55,913 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:55,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:55,915 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:55,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 01:48:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 01:48:56,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:57,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:16,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1419545270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:16,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095253713] [2022-11-03 01:49:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:16,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:16,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:16,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:16,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:49:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 01:49:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:21,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:22,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095253713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:22,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:50:22,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 27, 27] total 102 [2022-11-03 01:50:22,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478454959] [2022-11-03 01:50:22,943 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:22,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-03 01:50:22,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-03 01:50:22,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=9841, Unknown=27, NotChecked=0, Total=10302 [2022-11-03 01:50:22,947 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand has 102 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 102 states have internal predecessors, (143), 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 01:50:39,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:39,293 INFO L93 Difference]: Finished difference Result 268 states and 359 transitions. [2022-11-03 01:50:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-03 01:50:39,294 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 102 states have internal predecessors, (143), 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 30 [2022-11-03 01:50:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:39,295 INFO L225 Difference]: With dead ends: 268 [2022-11-03 01:50:39,295 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 01:50:39,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5344 ImplicationChecksByTransitivity, 105.1s TimeCoverageRelationStatistics Valid=1378, Invalid=20647, Unknown=27, NotChecked=0, Total=22052 [2022-11-03 01:50:39,299 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 574 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1645 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:39,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 2543 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 194 Invalid, 0 Unknown, 1645 Unchecked, 0.3s Time] [2022-11-03 01:50:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 01:50:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 122. [2022-11-03 01:50:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 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 01:50:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 168 transitions. [2022-11-03 01:50:39,309 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 168 transitions. Word has length 30 [2022-11-03 01:50:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:39,309 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 168 transitions. [2022-11-03 01:50:39,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 102 states have internal predecessors, (143), 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 01:50:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 168 transitions. [2022-11-03 01:50:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:50:39,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:39,311 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:39,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-03 01:50:39,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:39,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-11-03 01:50:39,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:50:39,924 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:39,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1326102595, now seen corresponding path program 1 times [2022-11-03 01:50:39,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:39,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133072803] [2022-11-03 01:50:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:39,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:39,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:39,926 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:39,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:50:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:40,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:50:40,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:40,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:40,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133072803] [2022-11-03 01:50:40,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133072803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:40,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:40,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:50:40,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788671007] [2022-11-03 01:50:40,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:40,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:50:40,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:50:40,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:50:40,174 INFO L87 Difference]: Start difference. First operand 122 states and 168 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 01:50:40,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:40,218 INFO L93 Difference]: Finished difference Result 176 states and 240 transitions. [2022-11-03 01:50:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:50:40,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 30 [2022-11-03 01:50:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:40,221 INFO L225 Difference]: With dead ends: 176 [2022-11-03 01:50:40,221 INFO L226 Difference]: Without dead ends: 112 [2022-11-03 01:50:40,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 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 01:50:40,224 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:40,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-11-03 01:50:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-03 01:50:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2022-11-03 01:50:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3523809523809525) internal successors, (142), 105 states have internal predecessors, (142), 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 01:50:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2022-11-03 01:50:40,235 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 30 [2022-11-03 01:50:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:40,235 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2022-11-03 01:50:40,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 01:50:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2022-11-03 01:50:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:50:40,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:40,241 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:40,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:40,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:40,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2060575169, now seen corresponding path program 1 times [2022-11-03 01:50:40,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:40,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334806796] [2022-11-03 01:50:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:40,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:40,451 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:40,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:50:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:40,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 01:50:40,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:41,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:47,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:47,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334806796] [2022-11-03 01:50:47,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334806796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:47,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [24831688] [2022-11-03 01:50:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:47,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:50:47,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:50:47,479 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:50:47,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 01:50:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 01:50:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:49,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:00,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [24831688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:00,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767254013] [2022-11-03 01:51:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:00,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:00,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:00,843 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:00,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 01:51:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:00,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 01:51:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:05,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:52,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767254013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:52,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:51:52,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18, 18, 27, 27] total 102 [2022-11-03 01:51:52,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768770242] [2022-11-03 01:51:52,020 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:52,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-03 01:51:52,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:52,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-03 01:51:52,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=9840, Unknown=16, NotChecked=0, Total=10302 [2022-11-03 01:51:52,023 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand has 102 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 102 states have internal predecessors, (145), 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 01:52:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:09,871 INFO L93 Difference]: Finished difference Result 322 states and 416 transitions. [2022-11-03 01:52:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-03 01:52:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 102 states have internal predecessors, (145), 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 30 [2022-11-03 01:52:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:09,873 INFO L225 Difference]: With dead ends: 322 [2022-11-03 01:52:09,873 INFO L226 Difference]: Without dead ends: 320 [2022-11-03 01:52:09,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6418 ImplicationChecksByTransitivity, 86.4s TimeCoverageRelationStatistics Valid=1638, Invalid=24428, Unknown=16, NotChecked=0, Total=26082 [2022-11-03 01:52:09,876 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 474 mSDsluCounter, 4376 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 4453 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1989 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:09,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 4453 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 1989 Unchecked, 0.2s Time] [2022-11-03 01:52:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-03 01:52:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 122. [2022-11-03 01:52:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.371900826446281) internal successors, (166), 121 states have internal predecessors, (166), 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 01:52:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 166 transitions. [2022-11-03 01:52:09,886 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 166 transitions. Word has length 30 [2022-11-03 01:52:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:09,887 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 166 transitions. [2022-11-03 01:52:09,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 102 states have internal predecessors, (145), 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 01:52:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 166 transitions. [2022-11-03 01:52:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:52:09,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:09,888 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:09,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-11-03 01:52:10,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-03 01:52:10,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:10,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:10,492 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash -394490563, now seen corresponding path program 1 times [2022-11-03 01:52:10,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:10,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117151238] [2022-11-03 01:52:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:10,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:10,494 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:10,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:52:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:10,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 01:52:10,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:11,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:15,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:15,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117151238] [2022-11-03 01:52:15,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117151238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:15,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1076510388] [2022-11-03 01:52:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:15,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:15,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:15,178 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:15,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 01:52:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 01:52:15,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:21,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:35,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1076510388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:35,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545475238] [2022-11-03 01:52:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:35,177 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:35,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 01:52:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:35,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 01:52:35,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:40,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:19,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545475238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:19,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:53:19,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 27, 27] total 102 [2022-11-03 01:53:19,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903902119] [2022-11-03 01:53:19,923 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:19,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-03 01:53:19,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-03 01:53:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=9850, Unknown=14, NotChecked=0, Total=10302 [2022-11-03 01:53:19,925 INFO L87 Difference]: Start difference. First operand 122 states and 166 transitions. Second operand has 102 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 102 states have internal predecessors, (143), 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 01:53:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:53,047 INFO L93 Difference]: Finished difference Result 379 states and 489 transitions. [2022-11-03 01:53:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-03 01:53:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 102 states have internal predecessors, (143), 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 30 [2022-11-03 01:53:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:53,050 INFO L225 Difference]: With dead ends: 379 [2022-11-03 01:53:53,050 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 01:53:53,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5965 ImplicationChecksByTransitivity, 99.2s TimeCoverageRelationStatistics Valid=1428, Invalid=23363, Unknown=15, NotChecked=0, Total=24806 [2022-11-03 01:53:53,052 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 747 mSDsluCounter, 6427 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 6571 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2014 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:53,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 6571 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 2014 Unchecked, 0.4s Time] [2022-11-03 01:53:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 01:53:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 118. [2022-11-03 01:53:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 117 states have internal predecessors, (160), 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 01:53:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2022-11-03 01:53:53,064 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 160 transitions. Word has length 30 [2022-11-03 01:53:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:53,064 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-11-03 01:53:53,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 102 states have internal predecessors, (143), 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 01:53:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 160 transitions. [2022-11-03 01:53:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:53:53,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:53,066 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:53,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:53,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:53,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:53,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:53,677 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:53,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:53,678 INFO L85 PathProgramCache]: Analyzing trace with hash 306574015, now seen corresponding path program 1 times [2022-11-03 01:53:53,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:53,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437311575] [2022-11-03 01:53:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:53,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:53,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:53,680 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:53,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:53:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:53,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:53:53,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:53,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:53,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437311575] [2022-11-03 01:53:53,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437311575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:53,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:53,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:53:53,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561457821] [2022-11-03 01:53:53,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:53,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:53:53,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:53,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:53:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:53:53,930 INFO L87 Difference]: Start difference. First operand 118 states and 160 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 01:53:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:53,963 INFO L93 Difference]: Finished difference Result 164 states and 221 transitions. [2022-11-03 01:53:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 30 [2022-11-03 01:53:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:53,964 INFO L225 Difference]: With dead ends: 164 [2022-11-03 01:53:53,964 INFO L226 Difference]: Without dead ends: 114 [2022-11-03 01:53:53,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 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 01:53:53,965 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:53,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 175 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-11-03 01:53:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-03 01:53:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2022-11-03 01:53:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3333333333333333) internal successors, (148), 111 states have internal predecessors, (148), 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 01:53:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2022-11-03 01:53:53,975 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 30 [2022-11-03 01:53:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:53,975 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2022-11-03 01:53:53,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 01:53:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2022-11-03 01:53:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:53:53,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:53,976 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:53,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:54,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:54,181 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:54,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:54,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2120133563, now seen corresponding path program 1 times [2022-11-03 01:53:54,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:54,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716330712] [2022-11-03 01:53:54,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:54,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:54,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:54,184 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:54,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:53:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:54,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 01:53:54,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:01,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:14,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716330712] [2022-11-03 01:54:14,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716330712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [32532248] [2022-11-03 01:54:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:14,933 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:14,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:14,935 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:14,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 01:54:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:15,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 01:54:15,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:18,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:24,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [32532248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537567568] [2022-11-03 01:54:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:24,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:24,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:24,936 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:24,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9ae2b-0fd3-4daf-9f77-d3e4116a7d7f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 01:54:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:25,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 01:54:25,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:39,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:33,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537567568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:33,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:33,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18, 18, 27, 27] total 110 [2022-11-03 01:55:33,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424109593] [2022-11-03 01:55:33,910 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:33,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-03 01:55:33,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-03 01:55:33,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=11468, Unknown=22, NotChecked=0, Total=11990 [2022-11-03 01:55:33,913 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 110 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 110 states have internal predecessors, (160), 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)