./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS --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 bd8a86fa4f066b15db9b2bf3d5b05fdfa163a1ceac95f1ac0dba938965cde89d --- 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-8393723 [2022-11-19 08:09:15,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:09:15,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:09:15,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:09:15,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:09:15,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:09:15,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:09:15,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:09:15,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:09:15,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:09:15,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:09:15,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:09:15,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:09:15,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:09:15,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:09:15,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:09:15,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:09:15,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:09:15,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:09:15,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:09:15,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:09:15,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:09:15,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:09:15,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:09:15,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:09:15,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:09:15,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:09:15,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:09:15,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:09:15,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:09:15,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:09:15,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:09:15,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:09:15,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:09:15,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:09:15,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:09:15,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:09:15,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:09:15,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:09:15,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:09:15,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:09:15,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:09:15,506 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:09:15,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:09:15,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:09:15,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:09:15,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:09:15,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:09:15,508 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:09:15,509 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:09:15,509 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:09:15,509 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:09:15,510 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:09:15,510 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:09:15,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:09:15,511 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:09:15,511 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:09:15,511 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:09:15,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:09:15,512 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:09:15,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:09:15,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:09:15,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:09:15,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:09:15,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:09:15,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:09:15,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:09:15,514 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:09:15,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:09:15,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:09:15,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:09:15,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:09:15,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:09:15,517 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:09:15,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:09:15,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:09:15,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:09:15,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:09:15,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:09:15,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:09:15,519 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_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd8a86fa4f066b15db9b2bf3d5b05fdfa163a1ceac95f1ac0dba938965cde89d [2022-11-19 08:09:15,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:09:15,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:09:15,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:09:15,852 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:09:15,852 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:09:15,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c [2022-11-19 08:09:15,929 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data/a052f5ada/2485c945ffe9400eb2ab56532ee3b2fe/FLAG89a4b1f31 [2022-11-19 08:09:16,472 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:09:16,473 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c [2022-11-19 08:09:16,487 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data/a052f5ada/2485c945ffe9400eb2ab56532ee3b2fe/FLAG89a4b1f31 [2022-11-19 08:09:16,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data/a052f5ada/2485c945ffe9400eb2ab56532ee3b2fe [2022-11-19 08:09:16,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:09:16,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:09:16,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:09:16,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:09:16,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:09:16,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:09:16" (1/1) ... [2022-11-19 08:09:16,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58647355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:16, skipping insertion in model container [2022-11-19 08:09:16,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:09:16" (1/1) ... [2022-11-19 08:09:16,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:09:16,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:09:17,035 WARN L234 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_742ea064-ff9c-423c-83a8-d75b3d83ca90/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c[1107,1120] [2022-11-19 08:09:17,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:09:17,083 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:09:17,097 WARN L234 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_742ea064-ff9c-423c-83a8-d75b3d83ca90/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c[1107,1120] [2022-11-19 08:09:17,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:09:17,163 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:09:17,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17 WrapperNode [2022-11-19 08:09:17,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:09:17,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:09:17,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:09:17,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:09:17,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,236 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 160 [2022-11-19 08:09:17,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:09:17,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:09:17,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:09:17,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:09:17,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,287 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:09:17,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:09:17,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:09:17,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:09:17,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (1/1) ... [2022-11-19 08:09:17,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:09:17,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:17,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:09:17,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:09:17,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:09:17,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:09:17,484 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:09:17,487 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:09:17,769 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:09:18,019 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:09:18,019 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:09:18,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:09:18 BoogieIcfgContainer [2022-11-19 08:09:18,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:09:18,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:09:18,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:09:18,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:09:18,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:09:16" (1/3) ... [2022-11-19 08:09:18,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c48bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:09:18, skipping insertion in model container [2022-11-19 08:09:18,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:17" (2/3) ... [2022-11-19 08:09:18,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c48bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:09:18, skipping insertion in model container [2022-11-19 08:09:18,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:09:18" (3/3) ... [2022-11-19 08:09:18,031 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.synabs.c [2022-11-19 08:09:18,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:09:18,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:09:18,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:09:18,106 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;@d36559e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:09:18,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:09:18,120 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) [2022-11-19 08:09:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:09:18,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:18,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:09:18,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash 4432357, now seen corresponding path program 1 times [2022-11-19 08:09:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:18,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846740846] [2022-11-19 08:09:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:18,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:09:18,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 08:09:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:09:18,404 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 08:09:18,408 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 08:09:18,409 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 08:09:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:09:18,416 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-19 08:09:18,420 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:09:18,444 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-19 08:09:18,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:09:18 BoogieIcfgContainer [2022-11-19 08:09:18,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:09:18,456 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:09:18,456 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:09:18,456 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:09:18,458 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:09:18" (3/4) ... [2022-11-19 08:09:18,461 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 08:09:18,461 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:09:18,463 INFO L158 Benchmark]: Toolchain (without parser) took 1638.49ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 67.6MB in the beginning and 72.1MB in the end (delta: -4.5MB). Peak memory consumption was 20.7MB. Max. memory is 16.1GB. [2022-11-19 08:09:18,464 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 98.6MB. Free memory was 51.7MB in the beginning and 51.7MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:09:18,465 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.00ms. Allocated memory is still 98.6MB. Free memory was 67.4MB in the beginning and 74.3MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 08:09:18,467 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.86ms. Allocated memory is still 98.6MB. Free memory was 73.9MB in the beginning and 71.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:09:18,475 INFO L158 Benchmark]: Boogie Preprocessor took 59.59ms. Allocated memory is still 98.6MB. Free memory was 71.8MB in the beginning and 70.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:09:18,475 INFO L158 Benchmark]: RCFGBuilder took 723.10ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 70.1MB in the beginning and 92.0MB in the end (delta: -21.9MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2022-11-19 08:09:18,477 INFO L158 Benchmark]: TraceAbstraction took 429.09ms. Allocated memory is still 123.7MB. Free memory was 91.0MB in the beginning and 72.7MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-19 08:09:18,478 INFO L158 Benchmark]: Witness Printer took 5.67ms. Allocated memory is still 123.7MB. Free memory was 72.7MB in the beginning and 72.1MB in the end (delta: 570.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:09:18,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 98.6MB. Free memory was 51.7MB in the beginning and 51.7MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.00ms. Allocated memory is still 98.6MB. Free memory was 67.4MB in the beginning and 74.3MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.86ms. Allocated memory is still 98.6MB. Free memory was 73.9MB in the beginning and 71.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.59ms. Allocated memory is still 98.6MB. Free memory was 71.8MB in the beginning and 70.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 723.10ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 70.1MB in the beginning and 92.0MB in the end (delta: -21.9MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. * TraceAbstraction took 429.09ms. Allocated memory is still 123.7MB. Free memory was 91.0MB in the beginning and 72.7MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Witness Printer took 5.67ms. Allocated memory is still 123.7MB. Free memory was 72.7MB in the beginning and 72.1MB in the end (delta: 570.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 73, overapproximation of bitwiseAnd at line 67. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 5); [L29] const SORT_4 msb_SORT_4 = (SORT_4)1 << (5 - 1); [L31] const SORT_8 mask_SORT_8 = (SORT_8)-1 >> (sizeof(SORT_8) * 8 - 4); [L32] const SORT_8 msb_SORT_8 = (SORT_8)1 << (4 - 1); [L34] const SORT_4 var_5 = 1; [L35] const SORT_8 var_9 = 2; [L36] const SORT_1 var_15 = 1; [L37] const SORT_4 var_19 = 5; [L38] const SORT_4 var_22 = 7; [L39] const SORT_4 var_26 = 11; [L40] const SORT_4 var_29 = 3; [L41] const SORT_8 var_30 = 1; [L42] const SORT_8 var_37 = 5; [L44] SORT_1 input_2; [L45] SORT_1 input_3; [L47] SORT_4 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L48] SORT_4 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L49] SORT_4 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L50] SORT_4 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L52] SORT_4 init_7_arg_1 = var_5; [L53] state_6 = init_7_arg_1 [L54] SORT_4 init_21_arg_1 = var_19; [L55] state_20 = init_21_arg_1 [L56] SORT_4 init_24_arg_1 = var_22; [L57] state_23 = init_24_arg_1 [L58] SORT_4 init_28_arg_1 = var_26; [L59] state_27 = init_28_arg_1 VAL [init_21_arg_1=5, init_24_arg_1=7, init_28_arg_1=11, init_7_arg_1=1, mask_SORT_1=1, mask_SORT_4=31, mask_SORT_8=15, msb_SORT_1=1, msb_SORT_4=16, msb_SORT_8=8, state_20=5, state_23=7, state_27=11, state_6=1, var_15=1, var_19=5, var_22=7, var_26=11, var_29=3, var_30=1, var_37=5, var_5=1, var_9=2] [L62] input_2 = __VERIFIER_nondet_uchar() [L63] input_3 = __VERIFIER_nondet_uchar() [L66] SORT_8 var_10_arg_0 = var_9; [L67] var_10_arg_0 = var_10_arg_0 & mask_SORT_8 [L68] SORT_4 var_10 = var_10_arg_0; [L69] SORT_4 var_11_arg_0 = state_6; [L70] SORT_4 var_11_arg_1 = var_10; [L71] SORT_1 var_11 = var_11_arg_0 == var_11_arg_1; [L72] SORT_1 var_12_arg_0 = var_11; [L73] SORT_1 var_12 = ~var_12_arg_0; [L74] SORT_1 var_16_arg_0 = var_12; [L75] SORT_1 var_16 = ~var_16_arg_0; [L76] SORT_1 var_17_arg_0 = var_15; [L77] SORT_1 var_17_arg_1 = var_16; [L78] SORT_1 var_17 = var_17_arg_0 & var_17_arg_1; [L79] var_17 = var_17 & mask_SORT_1 [L80] SORT_1 bad_18_arg_0 = var_17; [L81] 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: 0.3s, 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 [2022-11-19 08:09:18,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS --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 bd8a86fa4f066b15db9b2bf3d5b05fdfa163a1ceac95f1ac0dba938965cde89d --- 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-8393723 [2022-11-19 08:09:20,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:09:20,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:09:20,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:09:20,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:09:20,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:09:20,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:09:20,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:09:20,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:09:20,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:09:20,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:09:20,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:09:20,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:09:20,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:09:20,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:09:20,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:09:20,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:09:20,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:09:20,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:09:20,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:09:20,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:09:20,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:09:20,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:09:20,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:09:20,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:09:20,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:09:20,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:09:20,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:09:20,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:09:20,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:09:20,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:09:20,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:09:20,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:09:20,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:09:20,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:09:20,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:09:20,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:09:20,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:09:20,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:09:20,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:09:20,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:09:20,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-19 08:09:20,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:09:20,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:09:20,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:09:20,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:09:20,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:09:20,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:09:20,862 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:09:20,862 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:09:20,863 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:09:20,863 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:09:20,864 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:09:20,864 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:09:20,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:09:20,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:09:20,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:09:20,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:09:20,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:09:20,867 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:09:20,867 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 08:09:20,867 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 08:09:20,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:09:20,868 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:09:20,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:09:20,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:09:20,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 08:09:20,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:09:20,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:09:20,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:09:20,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:09:20,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:09:20,870 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 08:09:20,870 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 08:09:20,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:09:20,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:09:20,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 08:09:20,871 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_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd8a86fa4f066b15db9b2bf3d5b05fdfa163a1ceac95f1ac0dba938965cde89d [2022-11-19 08:09:21,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:09:21,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:09:21,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:09:21,303 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:09:21,303 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:09:21,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c [2022-11-19 08:09:21,392 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data/f4b76da61/ef1ed5d3b1ab489285a230fd4fb85fe0/FLAG477e9ac7d [2022-11-19 08:09:21,957 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:09:21,958 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c [2022-11-19 08:09:21,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data/f4b76da61/ef1ed5d3b1ab489285a230fd4fb85fe0/FLAG477e9ac7d [2022-11-19 08:09:22,296 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/data/f4b76da61/ef1ed5d3b1ab489285a230fd4fb85fe0 [2022-11-19 08:09:22,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:09:22,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:09:22,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:09:22,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:09:22,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:09:22,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aa17cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22, skipping insertion in model container [2022-11-19 08:09:22,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:09:22,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:09:22,503 WARN L234 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_742ea064-ff9c-423c-83a8-d75b3d83ca90/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c[1107,1120] [2022-11-19 08:09:22,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:09:22,586 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:09:22,609 WARN L234 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_742ea064-ff9c-423c-83a8-d75b3d83ca90/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synabs.c[1107,1120] [2022-11-19 08:09:22,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:09:22,687 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:09:22,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22 WrapperNode [2022-11-19 08:09:22,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:09:22,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:09:22,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:09:22,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:09:22,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,750 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 111 [2022-11-19 08:09:22,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:09:22,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:09:22,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:09:22,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:09:22,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,797 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:09:22,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:09:22,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:09:22,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:09:22,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (1/1) ... [2022-11-19 08:09:22,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:09:22,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:22,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:09:22,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:09:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:09:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:09:23,016 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:09:23,018 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:09:23,261 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:09:23,267 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:09:23,268 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:09:23,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:09:23 BoogieIcfgContainer [2022-11-19 08:09:23,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:09:23,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:09:23,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:09:23,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:09:23,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:09:22" (1/3) ... [2022-11-19 08:09:23,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ccbfe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:09:23, skipping insertion in model container [2022-11-19 08:09:23,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:09:22" (2/3) ... [2022-11-19 08:09:23,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ccbfe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:09:23, skipping insertion in model container [2022-11-19 08:09:23,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:09:23" (3/3) ... [2022-11-19 08:09:23,278 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.synabs.c [2022-11-19 08:09:23,297 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:09:23,297 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:09:23,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:09:23,375 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;@7e87f9a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:09:23,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:09:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-11-19 08:09:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:09:23,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:23,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:09:23,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-19 08:09:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:09:23,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606935956] [2022-11-19 08:09:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:23,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:09:23,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:09:23,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:09:23,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 08:09:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:09:23,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:23,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:23,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:09:23,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606935956] [2022-11-19 08:09:23,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606935956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:23,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:23,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:09:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073638040] [2022-11-19 08:09:23,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:23,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:09:23,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:09:23,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:09:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:09:23,771 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-11-19 08:09:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:23,841 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-19 08:09:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:09:23,844 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 [2022-11-19 08:09:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:23,852 INFO L225 Difference]: With dead ends: 20 [2022-11-19 08:09:23,852 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 08:09:23,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:09:23,859 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:23,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:09:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 08:09:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-19 08:09:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-11-19 08:09:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-19 08:09:23,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-19 08:09:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:23,923 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-19 08:09:23,923 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) [2022-11-19 08:09:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-19 08:09:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:09:23,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:23,924 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:23,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:24,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:09:24,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-19 08:09:24,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:09:24,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694714736] [2022-11-19 08:09:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:24,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:09:24,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:09:24,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:09:24,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 08:09:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:24,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:09:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:24,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:25,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:09:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694714736] [2022-11-19 08:09:25,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694714736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:25,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159376615] [2022-11-19 08:09:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:25,078 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:09:25,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:09:25,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:09:25,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-19 08:09:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:09:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:25,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:25,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159376615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922009222] [2022-11-19 08:09:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:25,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:25,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:25,679 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:25,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:09:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:25,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-19 08:09:25,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:25,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:26,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922009222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:26,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:09:26,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 10 [2022-11-19 08:09:26,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114894054] [2022-11-19 08:09:26,230 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:09:26,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:09:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:09:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:09:26,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:09:26,234 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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) [2022-11-19 08:09:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:26,346 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-11-19 08:09:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:09:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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 8 [2022-11-19 08:09:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:26,347 INFO L225 Difference]: With dead ends: 16 [2022-11-19 08:09:26,348 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 08:09:26,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:09:26,351 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:26,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2022-11-19 08:09:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 08:09:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-19 08:09:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-11-19 08:09:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-19 08:09:26,362 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-19 08:09:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:26,363 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-19 08:09:26,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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) [2022-11-19 08:09:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-19 08:09:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:09:26,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:26,364 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-19 08:09:26,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:26,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 08:09:26,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:26,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:09:26,977 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-19 08:09:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:09:26,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804340604] [2022-11-19 08:09:26,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:09:26,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:09:26,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:09:26,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:09:26,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 08:09:27,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:09:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-19 08:09:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:27,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:28,617 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:09:28,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804340604] [2022-11-19 08:09:28,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804340604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:28,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [283118871] [2022-11-19 08:09:28,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:09:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:09:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:09:28,623 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:09:28,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 08:09:28,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:09:28,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:28,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-19 08:09:28,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:29,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:29,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [283118871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:29,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347697932] [2022-11-19 08:09:29,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:09:29,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:29,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:29,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:29,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:09:29,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:09:29,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:29,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-19 08:09:29,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:30,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:31,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347697932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:31,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:09:31,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 20 [2022-11-19 08:09:31,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176603083] [2022-11-19 08:09:31,279 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:09:31,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:09:31,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:09:31,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:09:31,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:09:31,280 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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) [2022-11-19 08:09:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:31,622 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-11-19 08:09:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:09:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:09:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:31,623 INFO L225 Difference]: With dead ends: 19 [2022-11-19 08:09:31,623 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 08:09:31,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:09:31,625 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:31,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 45 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-19 08:09:31,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 08:09:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-11-19 08:09:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-11-19 08:09:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-19 08:09:31,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2022-11-19 08:09:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:31,631 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-19 08:09:31,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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) [2022-11-19 08:09:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-19 08:09:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:09:31,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:31,632 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2022-11-19 08:09:31,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-19 08:09:31,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:32,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:32,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:32,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:32,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1580781475, now seen corresponding path program 3 times [2022-11-19 08:09:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:09:32,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400369021] [2022-11-19 08:09:32,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:09:32,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:09:32,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:09:32,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:09:32,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 08:09:32,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:09:32,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:32,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 08:09:32,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:32,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:33,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:09:33,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400369021] [2022-11-19 08:09:33,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400369021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:33,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2041851885] [2022-11-19 08:09:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:09:33,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:09:33,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:09:33,756 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:09:33,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-19 08:09:33,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:09:33,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:33,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 08:09:33,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:34,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:34,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2041851885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:34,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422766969] [2022-11-19 08:09:34,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:09:34,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:34,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:34,889 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:34,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:09:34,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:09:34,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:34,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-19 08:09:35,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:35,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:37,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422766969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:37,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:09:37,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 19 [2022-11-19 08:09:37,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106128829] [2022-11-19 08:09:37,460 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:09:37,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:09:37,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:09:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:09:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:09:37,465 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2022-11-19 08:09:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:37,961 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-11-19 08:09:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:09:37,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) Word has length 14 [2022-11-19 08:09:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:37,964 INFO L225 Difference]: With dead ends: 22 [2022-11-19 08:09:37,964 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 08:09:37,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-19 08:09:37,965 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:37,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-11-19 08:09:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 08:09:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-19 08:09:37,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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) [2022-11-19 08:09:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-19 08:09:37,970 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2022-11-19 08:09:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:37,975 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-19 08:09:37,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2022-11-19 08:09:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-19 08:09:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:09:37,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:37,977 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2022-11-19 08:09:37,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:38,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:38,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:38,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:38,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1250702327, now seen corresponding path program 4 times [2022-11-19 08:09:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:09:38,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266462921] [2022-11-19 08:09:38,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:09:38,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:09:38,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:09:38,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:09:38,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 08:09:38,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:09:38,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:38,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-19 08:09:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:09:39,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:39,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:09:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266462921] [2022-11-19 08:09:39,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266462921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1071850030] [2022-11-19 08:09:39,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:09:39,912 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:09:39,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:09:39,914 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:09:39,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-19 08:09:40,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:09:40,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:40,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-19 08:09:40,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:09:40,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:40,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1071850030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:40,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226160933] [2022-11-19 08:09:40,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:09:40,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:40,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:40,940 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:40,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:09:41,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:09:41,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:41,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 08:09:41,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:09:41,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:42,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226160933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:42,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:09:42,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 8, 9] total 15 [2022-11-19 08:09:42,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786032047] [2022-11-19 08:09:42,059 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:09:42,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:09:42,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:09:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:09:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:09:42,060 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2022-11-19 08:09:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:42,291 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-11-19 08:09:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:09:42,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 17 [2022-11-19 08:09:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:42,296 INFO L225 Difference]: With dead ends: 28 [2022-11-19 08:09:42,296 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 08:09:42,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:09:42,304 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:42,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-19 08:09:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 08:09:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-19 08:09:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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) [2022-11-19 08:09:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-19 08:09:42,317 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2022-11-19 08:09:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:42,317 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-19 08:09:42,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2022-11-19 08:09:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-19 08:09:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:09:42,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:42,319 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1] [2022-11-19 08:09:42,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:42,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:42,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-19 08:09:42,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:09:42,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash -826954269, now seen corresponding path program 5 times [2022-11-19 08:09:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:09:42,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556173096] [2022-11-19 08:09:42,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 08:09:42,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:09:42,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:09:42,927 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:09:42,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 08:09:43,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 08:09:43,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:43,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 156 conjunts are in the unsatisfiable core [2022-11-19 08:09:43,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:44,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:50,997 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:09:50,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556173096] [2022-11-19 08:09:50,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556173096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:50,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [146337515] [2022-11-19 08:09:50,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 08:09:50,998 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:09:50,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:09:50,999 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:09:51,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-19 08:09:51,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 08:09:51,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-19 08:09:51,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:52,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:55,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [146337515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:55,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539537768] [2022-11-19 08:09:55,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 08:09:55,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:55,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:55,103 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:55,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:09:55,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 08:09:55,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 159 conjunts are in the unsatisfiable core [2022-11-19 08:09:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:57,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:01,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539537768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:01,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:10:01,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 12, 11] total 43 [2022-11-19 08:10:01,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127964960] [2022-11-19 08:10:01,575 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:10:01,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 08:10:01,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:10:01,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 08:10:01,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:10:01,577 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 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) [2022-11-19 08:10:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:04,171 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-11-19 08:10:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:10:04,171 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 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 20 [2022-11-19 08:10:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:04,173 INFO L225 Difference]: With dead ends: 38 [2022-11-19 08:10:04,173 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 08:10:04,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=331, Invalid=2531, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:10:04,177 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 50 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:04,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 75 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 297 Unchecked, 0.2s Time] [2022-11-19 08:10:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 08:10:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-11-19 08:10:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 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) [2022-11-19 08:10:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-19 08:10:04,194 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 20 [2022-11-19 08:10:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:04,195 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-19 08:10:04,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 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) [2022-11-19 08:10:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-19 08:10:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:10:04,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:04,196 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1] [2022-11-19 08:10:04,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:04,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:04,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:04,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:10:04,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:04,802 INFO L85 PathProgramCache]: Analyzing trace with hash 637038473, now seen corresponding path program 6 times [2022-11-19 08:10:04,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:10:04,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151576329] [2022-11-19 08:10:04,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 08:10:04,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:10:04,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:10:04,805 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:10:04,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 08:10:04,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-19 08:10:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:10:05,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-19 08:10:05,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:06,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:08,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:10:08,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151576329] [2022-11-19 08:10:08,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151576329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:08,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1003480332] [2022-11-19 08:10:08,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 08:10:08,644 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:10:08,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:10:08,645 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:10:08,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-19 08:10:09,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-19 08:10:09,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:10:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-19 08:10:09,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:09,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:10,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1003480332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:10,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120223881] [2022-11-19 08:10:10,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 08:10:10,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:10,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:10,511 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:10,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:10:10,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-19 08:10:10,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:10:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-19 08:10:10,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:11,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:12,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120223881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:12,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:10:12,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-19 08:10:12,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63900177] [2022-11-19 08:10:12,171 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:10:12,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:10:12,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:10:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:10:12,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:10:12,173 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2022-11-19 08:10:16,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:16,758 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-11-19 08:10:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:10:16,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 29 [2022-11-19 08:10:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:16,760 INFO L225 Difference]: With dead ends: 63 [2022-11-19 08:10:16,760 INFO L226 Difference]: Without dead ends: 61 [2022-11-19 08:10:16,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 08:10:16,762 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 78 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:16,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 51 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 237 Invalid, 0 Unknown, 142 Unchecked, 0.4s Time] [2022-11-19 08:10:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-19 08:10:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-11-19 08:10:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 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) [2022-11-19 08:10:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-11-19 08:10:16,795 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 29 [2022-11-19 08:10:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:16,796 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-11-19 08:10:16,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2022-11-19 08:10:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-11-19 08:10:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 08:10:16,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:16,798 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1] [2022-11-19 08:10:16,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:17,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-11-19 08:10:17,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:17,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:17,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:17,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:17,404 INFO L85 PathProgramCache]: Analyzing trace with hash 660960099, now seen corresponding path program 7 times [2022-11-19 08:10:17,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:10:17,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689771531] [2022-11-19 08:10:17,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:10:17,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:10:17,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:10:17,406 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:10:17,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-19 08:10:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:17,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 528 conjunts are in the unsatisfiable core [2022-11-19 08:10:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:23,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:42,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:11:42,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689771531] [2022-11-19 08:11:42,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689771531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:42,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1077232371] [2022-11-19 08:11:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:11:42,010 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:11:42,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:11:42,012 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:11:42,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-19 08:11:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:42,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 147 conjunts are in the unsatisfiable core [2022-11-19 08:11:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:48,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:01,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1077232371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:01,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450717034] [2022-11-19 08:12:01,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:01,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:01,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:01,919 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 08:12:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-19 08:12:02,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:03,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:06,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450717034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:06,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:12:06,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 22, 22] total 77 [2022-11-19 08:12:06,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289591297] [2022-11-19 08:12:06,620 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:06,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-19 08:12:06,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:12:06,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-19 08:12:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=5066, Unknown=0, NotChecked=0, Total=5852 [2022-11-19 08:12:06,624 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 77 states, 77 states have (on average 2.844155844155844) internal successors, (219), 77 states have internal predecessors, (219), 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) [2022-11-19 08:13:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:00,846 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2022-11-19 08:13:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-19 08:13:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.844155844155844) internal successors, (219), 77 states have internal predecessors, (219), 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 56 [2022-11-19 08:13:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:00,848 INFO L225 Difference]: With dead ends: 117 [2022-11-19 08:13:00,848 INFO L226 Difference]: Without dead ends: 115 [2022-11-19 08:13:00,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 269 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 109.8s TimeCoverageRelationStatistics Valid=2792, Invalid=13210, Unknown=0, NotChecked=0, Total=16002 [2022-11-19 08:13:00,852 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 141 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1465 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:00,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 135 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1180 Invalid, 0 Unknown, 1465 Unchecked, 1.8s Time] [2022-11-19 08:13:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-19 08:13:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-11-19 08:13:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 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) [2022-11-19 08:13:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-11-19 08:13:00,895 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 56 [2022-11-19 08:13:00,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:00,895 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-11-19 08:13:00,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.844155844155844) internal successors, (219), 77 states have internal predecessors, (219), 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) [2022-11-19 08:13:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-11-19 08:13:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 08:13:00,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:00,898 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1] [2022-11-19 08:13:00,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:01,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:01,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-19 08:13:01,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:01,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:01,501 INFO L85 PathProgramCache]: Analyzing trace with hash -345230429, now seen corresponding path program 8 times [2022-11-19 08:13:01,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:13:01,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055675290] [2022-11-19 08:13:01,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:13:01,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:01,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:13:01,506 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:13:01,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-19 08:13:02,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:13:02,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:02,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 1044 conjunts are in the unsatisfiable core [2022-11-19 08:13:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:19,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:12,068 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 526 DAG size of output: 458 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:15:33,628 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 552 DAG size of output: 490 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:15:53,805 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 509 DAG size of output: 497 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:16:08,889 WARN L233 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 596 DAG size of output: 502 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:16:29,836 WARN L233 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 579 DAG size of output: 521 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:16:55,674 WARN L233 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 628 DAG size of output: 561 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:17:14,380 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 656 DAG size of output: 567 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:17:27,203 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 584 DAG size of output: 567 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:17:48,468 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 661 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:18:07,449 WARN L233 SmtUtils]: Spent 8.84s on a formula simplification. DAG size of input: 679 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:18:21,892 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 616 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:18:43,016 WARN L233 SmtUtils]: Spent 9.28s on a formula simplification. DAG size of input: 686 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:19:01,031 WARN L233 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 636 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:19:15,912 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 612 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:19:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:17,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:19:17,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055675290] [2022-11-19 08:19:17,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055675290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:17,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [736064313] [2022-11-19 08:19:17,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:19:17,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:19:17,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:19:17,783 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:19:17,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-19 08:19:19,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:19:19,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:19:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 273 conjunts are in the unsatisfiable core [2022-11-19 08:19:19,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:51,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:16,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [736064313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:21:16,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504383690] [2022-11-19 08:21:16,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:21:16,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:16,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:16,571 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:16,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742ea064-ff9c-423c-83a8-d75b3d83ca90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 08:21:17,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:21:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:21:17,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 273 conjunts are in the unsatisfiable core [2022-11-19 08:21:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:22,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:28,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504383690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:21:28,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:21:28,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39, 39, 39, 39] total 147 [2022-11-19 08:21:28,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628735699] [2022-11-19 08:21:28,253 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:21:28,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-11-19 08:21:28,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:21:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-11-19 08:21:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2314, Invalid=19145, Unknown=3, NotChecked=0, Total=21462 [2022-11-19 08:21:28,262 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 147 states, 147 states have (on average 2.931972789115646) internal successors, (431), 147 states have internal predecessors, (431), 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) [2022-11-19 08:22:20,832 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 726 DAG size of output: 648 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:22:33,528 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 590 DAG size of output: 558 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:22:46,385 WARN L233 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 592 DAG size of output: 560 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:22:59,192 WARN L233 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 588 DAG size of output: 556 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:23:11,385 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 572 DAG size of output: 541 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:23:24,605 WARN L233 SmtUtils]: Spent 7.66s on a formula simplification. DAG size of input: 576 DAG size of output: 545 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:23:37,075 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 556 DAG size of output: 526 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:23:49,845 WARN L233 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 560 DAG size of output: 530 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:24:01,758 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 540 DAG size of output: 511 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:24:13,497 WARN L233 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 544 DAG size of output: 515 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)