./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:53:13,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:53:13,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:53:13,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:53:13,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:53:13,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:53:13,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:53:13,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:53:13,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:53:13,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:53:13,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:53:13,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:53:13,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:53:13,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:53:13,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:53:13,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:53:13,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:53:13,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:53:13,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:53:13,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:53:13,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:53:13,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:53:13,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:53:13,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:53:13,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:53:13,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:53:13,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:53:13,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:53:13,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:53:13,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:53:13,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:53:13,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:53:13,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:53:13,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:53:13,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:53:13,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:53:13,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:53:13,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:53:13,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:53:13,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:53:13,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:53:13,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:53:13,510 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:53:13,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:53:13,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:53:13,512 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:53:13,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:53:13,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:53:13,514 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:53:13,514 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:53:13,514 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:53:13,515 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:53:13,516 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:53:13,517 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:53:13,517 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:53:13,517 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:53:13,518 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:53:13,518 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:53:13,518 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:53:13,519 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:53:13,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:53:13,520 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:53:13,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:53:13,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:53:13,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:53:13,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:53:13,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:53:13,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:53:13,523 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:53:13,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:53:13,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:53:13,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:53:13,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:53:13,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:53:13,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:53:13,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:53:13,526 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:53:13,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:53:13,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:53:13,535 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:53:13,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:53:13,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:53:13,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:53:13,537 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_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 [2022-11-03 01:53:13,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:53:13,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:53:13,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:53:13,881 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:53:13,882 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:53:13,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-11-03 01:53:13,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/data/3a5e4343d/f0176ad56c9f4553a3ab190a638cb8e5/FLAG2933657f7 [2022-11-03 01:53:14,450 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:53:14,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-11-03 01:53:14,458 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/data/3a5e4343d/f0176ad56c9f4553a3ab190a638cb8e5/FLAG2933657f7 [2022-11-03 01:53:14,813 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/data/3a5e4343d/f0176ad56c9f4553a3ab190a638cb8e5 [2022-11-03 01:53:14,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:53:14,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:53:14,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:53:14,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:53:14,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:53:14,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:53:14" (1/1) ... [2022-11-03 01:53:14,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693aceb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:14, skipping insertion in model container [2022-11-03 01:53:14,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:53:14" (1/1) ... [2022-11-03 01:53:14,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:53:14,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:53:15,071 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2022-11-03 01:53:15,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:53:15,100 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:53:15,115 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2022-11-03 01:53:15,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:53:15,136 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:53:15,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15 WrapperNode [2022-11-03 01:53:15,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:53:15,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:53:15,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:53:15,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:53:15,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,177 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-03 01:53:15,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:53:15,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:53:15,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:53:15,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:53:15,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,200 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:53:15,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:53:15,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:53:15,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:53:15,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (1/1) ... [2022-11-03 01:53:15,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:53:15,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:15,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:53:15,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:53:15,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:53:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:53:15,291 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:53:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:53:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:53:15,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:53:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:53:15,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:53:15,357 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:53:15,359 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:53:15,527 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:53:15,600 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:53:15,600 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:53:15,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:53:15 BoogieIcfgContainer [2022-11-03 01:53:15,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:53:15,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:53:15,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:53:15,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:53:15,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:53:14" (1/3) ... [2022-11-03 01:53:15,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b981405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:53:15, skipping insertion in model container [2022-11-03 01:53:15,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:15" (2/3) ... [2022-11-03 01:53:15,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b981405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:53:15, skipping insertion in model container [2022-11-03 01:53:15,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:53:15" (3/3) ... [2022-11-03 01:53:15,627 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2022-11-03 01:53:15,656 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:53:15,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:53:15,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:53:15,725 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;@750cf2a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:53:15,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:53:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 01:53:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:53:15,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:15,743 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:15,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1772938727, now seen corresponding path program 1 times [2022-11-03 01:53:15,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:15,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091233385] [2022-11-03 01:53:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:15,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:53:15,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378117807] [2022-11-03 01:53:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:15,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:15,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:15,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:15,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:53:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:16,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:53:16,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:16,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:16,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091233385] [2022-11-03 01:53:16,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:53:16,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378117807] [2022-11-03 01:53:16,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378117807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:16,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:16,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:53:16,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277968709] [2022-11-03 01:53:16,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:16,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:16,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:16,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:16,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:53:16,411 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:53:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:16,596 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-11-03 01:53:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:53:16,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-03 01:53:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:16,619 INFO L225 Difference]: With dead ends: 42 [2022-11-03 01:53:16,619 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 01:53:16,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:53:16,630 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:16,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 01:53:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-03 01:53:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 01:53:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-03 01:53:16,694 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-11-03 01:53:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:16,697 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-03 01:53:16,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:53:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-03 01:53:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 01:53:16,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:16,702 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:16,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:16,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 01:53:16,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1457957052, now seen corresponding path program 1 times [2022-11-03 01:53:16,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:16,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910937526] [2022-11-03 01:53:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:16,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:16,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:53:16,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119334736] [2022-11-03 01:53:16,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:16,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:16,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:16,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:16,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:53:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:53:17,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:53:17,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:17,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910937526] [2022-11-03 01:53:17,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:53:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119334736] [2022-11-03 01:53:17,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119334736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:17,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:17,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:53:17,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783662626] [2022-11-03 01:53:17,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:17,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:17,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:17,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:53:17,119 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:53:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:17,186 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-11-03 01:53:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:53:17,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2022-11-03 01:53:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:17,188 INFO L225 Difference]: With dead ends: 32 [2022-11-03 01:53:17,189 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 01:53:17,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:53:17,191 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:17,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:53:17,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 01:53:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-03 01:53:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 01:53:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-03 01:53:17,199 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2022-11-03 01:53:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:17,200 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-03 01:53:17,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:53:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-03 01:53:17,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 01:53:17,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:17,202 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:17,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:17,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:17,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:17,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash -489488164, now seen corresponding path program 1 times [2022-11-03 01:53:17,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:17,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211403693] [2022-11-03 01:53:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:17,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:17,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:53:17,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243415851] [2022-11-03 01:53:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:17,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:17,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:17,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:17,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:53:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:17,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:53:17,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:53:22,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:53:30,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:30,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211403693] [2022-11-03 01:53:30,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:53:30,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243415851] [2022-11-03 01:53:30,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243415851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:30,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110262091] [2022-11-03 01:53:30,915 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:53:30,915 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:30,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:30,926 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:30,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:31,979 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-03 01:53:32,092 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:53:32,094 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:37,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '482#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:37,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:37,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:37,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-11-03 01:53:37,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111581005] [2022-11-03 01:53:37,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:37,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:53:37,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:37,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:53:37,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:37,105 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 01:53:39,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:53:41,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:53:44,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:53:55,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:53:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:55,230 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-03 01:53:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:53:55,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 24 [2022-11-03 01:53:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:55,233 INFO L225 Difference]: With dead ends: 40 [2022-11-03 01:53:55,234 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 01:53:55,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:53:55,236 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 34 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:55,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 65 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 221 Invalid, 4 Unknown, 0 Unchecked, 9.8s Time] [2022-11-03 01:53:55,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 01:53:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-03 01:53:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:53:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-11-03 01:53:55,249 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2022-11-03 01:53:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:55,250 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-11-03 01:53:55,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 01:53:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-11-03 01:53:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:53:55,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:55,252 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:55,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:55,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:55,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash 750858559, now seen corresponding path program 1 times [2022-11-03 01:53:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:55,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240800711] [2022-11-03 01:53:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:55,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:55,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:53:55,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513951688] [2022-11-03 01:53:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:55,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:55,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:55,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:55,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:53:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:55,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:53:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:53:55,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:53:55,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:55,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240800711] [2022-11-03 01:53:55,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:53:55,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513951688] [2022-11-03 01:53:55,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513951688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:55,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891643125] [2022-11-03 01:53:55,870 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:53:55,871 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:55,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:55,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:55,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:56,667 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-03 01:53:56,675 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:53:56,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:59,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '802#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:59,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:59,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:59,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-03 01:53:59,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63952875] [2022-11-03 01:53:59,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:59,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:59,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:59,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:59,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=414, Unknown=1, NotChecked=0, Total=506 [2022-11-03 01:53:59,544 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 01:54:01,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:54:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:01,700 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-03 01:54:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:54:01,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 30 [2022-11-03 01:54:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:01,702 INFO L225 Difference]: With dead ends: 43 [2022-11-03 01:54:01,703 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 01:54:01,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=105, Invalid=494, Unknown=1, NotChecked=0, Total=600 [2022-11-03 01:54:01,706 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:01,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 63 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 01:54:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 01:54:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-03 01:54:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:54:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-03 01:54:01,717 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2022-11-03 01:54:01,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:01,718 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-03 01:54:01,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 01:54:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-03 01:54:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 01:54:01,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:01,720 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:01,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:01,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:01,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash -997597351, now seen corresponding path program 2 times [2022-11-03 01:54:01,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:01,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726708382] [2022-11-03 01:54:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:01,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:01,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:54:01,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122847008] [2022-11-03 01:54:01,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:54:01,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:01,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:01,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:01,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:54:02,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:54:02,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:54:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:54:03,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:10,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726708382] [2022-11-03 01:54:10,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:54:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122847008] [2022-11-03 01:54:10,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122847008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:10,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967952011] [2022-11-03 01:54:10,371 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:54:10,372 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:10,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:10,372 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:10,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:10,930 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-03 01:54:11,102 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:54:11,103 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:14,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1104#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:14,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:14,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:54:14,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-03 01:54:14,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053089248] [2022-11-03 01:54:14,113 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:14,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:54:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:54:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:54:14,117 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:54:18,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:54:23,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:54:28,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:54:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:29,041 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-11-03 01:54:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:54:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 45 [2022-11-03 01:54:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:29,042 INFO L225 Difference]: With dead ends: 46 [2022-11-03 01:54:29,042 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 01:54:29,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:54:29,044 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:29,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 181 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2022-11-03 01:54:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 01:54:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-03 01:54:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:54:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-03 01:54:29,057 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 45 [2022-11-03 01:54:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:29,058 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-03 01:54:29,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:54:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-03 01:54:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:54:29,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:29,060 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:29,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 01:54:29,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:29,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:29,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1414540388, now seen corresponding path program 3 times [2022-11-03 01:54:29,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:29,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868294537] [2022-11-03 01:54:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:29,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:29,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:54:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711606723] [2022-11-03 01:54:29,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:54:29,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:29,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:29,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:29,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:54:34,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:54:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:34,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 01:54:34,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:02,679 WARN L234 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 55 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:55:27,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:58,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:58,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868294537] [2022-11-03 01:55:58,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:55:58,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711606723] [2022-11-03 01:55:58,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711606723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:58,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567691129] [2022-11-03 01:55:58,189 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:55:58,190 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:55:58,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:55:58,190 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:55:58,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:55:58,703 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-03 01:55:58,830 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 01:55:58,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:03,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1478#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:56:03,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:03,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:56:03,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-03 01:56:03,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411320345] [2022-11-03 01:56:03,219 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:03,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:56:03,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:56:03,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1082, Unknown=10, NotChecked=0, Total=1260 [2022-11-03 01:56:03,221 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-03 01:56:06,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:56:09,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:56:20,909 WARN L234 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 40 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:22,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:56:24,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:56:26,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:56:28,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:56:30,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:56:32,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:56:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:33,205 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-11-03 01:56:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:56:33,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2022-11-03 01:56:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:33,207 INFO L225 Difference]: With dead ends: 53 [2022-11-03 01:56:33,207 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 01:56:33,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=193, Invalid=1277, Unknown=12, NotChecked=0, Total=1482 [2022-11-03 01:56:33,209 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 19 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:33,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 301 Invalid, 6 Unknown, 0 Unchecked, 18.1s Time] [2022-11-03 01:56:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 01:56:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-11-03 01:56:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-03 01:56:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-03 01:56:33,228 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 52 [2022-11-03 01:56:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:33,229 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-03 01:56:33,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-03 01:56:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-03 01:56:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 01:56:33,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:33,230 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:33,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 01:56:33,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:56:33,435 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:33,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:33,435 INFO L85 PathProgramCache]: Analyzing trace with hash 798891513, now seen corresponding path program 4 times [2022-11-03 01:56:33,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:33,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560828815] [2022-11-03 01:56:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:33,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:33,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:33,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829612954] [2022-11-03 01:56:33,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:56:33,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:33,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:33,464 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:33,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:56:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:33,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 01:56:33,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:11,300 WARN L234 SmtUtils]: Spent 34.58s on a formula simplification. DAG size of input: 71 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:24,550 WARN L234 SmtUtils]: Spent 1.48m on a formula simplification. DAG size of input: 124 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:54,834 WARN L234 SmtUtils]: Spent 11.25s on a formula simplification. DAG size of input: 89 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:59:56,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:00,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:00,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560828815] [2022-11-03 02:00:00,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:00:00,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829612954] [2022-11-03 02:00:00,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829612954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:00,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [661950621] [2022-11-03 02:00:00,428 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 02:00:00,428 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:00,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:00,429 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:00,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:01,057 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-03 02:00:01,149 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 02:00:01,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:12,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1862#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:12,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:12,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:12,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-03 02:00:12,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833528197] [2022-11-03 02:00:12,049 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:12,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:00:12,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:12,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:00:12,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=982, Unknown=3, NotChecked=0, Total=1122 [2022-11-03 02:00:12,053 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 02:00:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:13,247 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2022-11-03 02:00:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:13,248 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 59 [2022-11-03 02:00:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:13,250 INFO L225 Difference]: With dead ends: 59 [2022-11-03 02:00:13,250 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 02:00:13,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 165.5s TimeCoverageRelationStatistics Valid=150, Invalid=1107, Unknown=3, NotChecked=0, Total=1260 [2022-11-03 02:00:13,252 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:13,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 143 Unchecked, 1.0s Time] [2022-11-03 02:00:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 02:00:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-03 02:00:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:00:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-11-03 02:00:13,280 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 59 [2022-11-03 02:00:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:13,281 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-11-03 02:00:13,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 02:00:13,282 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-11-03 02:00:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:00:13,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:13,283 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:13,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:13,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:00:13,495 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:13,495 INFO L85 PathProgramCache]: Analyzing trace with hash -675946244, now seen corresponding path program 5 times [2022-11-03 02:00:13,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:13,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843940960] [2022-11-03 02:00:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:13,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:00:13,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089967240] [2022-11-03 02:00:13,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:13,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:13,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:13,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:13,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:00:13,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 02:00:13,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:13,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:00:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:00:19,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:25,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843940960] [2022-11-03 02:00:25,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:00:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089967240] [2022-11-03 02:00:25,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089967240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:25,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615594651] [2022-11-03 02:00:25,665 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 02:00:25,666 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:25,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:25,666 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:25,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:26,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-03 02:00:26,349 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-03 02:00:26,357 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:36,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2283#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:36,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:36,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:36,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-03 02:00:36,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060980076] [2022-11-03 02:00:36,238 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:36,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:00:36,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:00:36,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=910, Unknown=1, NotChecked=0, Total=1056 [2022-11-03 02:00:36,240 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-03 02:00:40,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:00:43,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:00:44,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:00:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:47,145 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-11-03 02:00:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:00:47,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 66 [2022-11-03 02:00:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:47,147 INFO L225 Difference]: With dead ends: 61 [2022-11-03 02:00:47,147 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 02:00:47,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=223, Invalid=1336, Unknown=1, NotChecked=0, Total=1560 [2022-11-03 02:00:47,150 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:47,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-03 02:00:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 02:00:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 02:00:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 02:00:47,152 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2022-11-03 02:00:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:47,152 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 02:00:47,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-03 02:00:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 02:00:47,153 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 02:00:47,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:00:47,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:47,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:47,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 02:00:55,824 WARN L234 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 266 DAG size of output: 30 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-03 02:00:56,154 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-03 02:00:56,155 INFO L902 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-11-03 02:00:56,155 INFO L895 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 50)) [2022-11-03 02:00:56,155 INFO L902 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-11-03 02:00:56,155 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-11-03 02:00:56,155 INFO L902 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-11-03 02:00:56,155 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 50))) (or (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0 (= |ULTIMATE.start_main_~z~0#1| 0) .cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (and .cse0 (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (<= 0 (+ (* 2 |ULTIMATE.start_main_~y~0#1|) 1)) .cse1 (= (+ (* 2 (* (div (- |ULTIMATE.start_main_~x~0#1|) (- 2)) |ULTIMATE.start_main_~y~0#1|)) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))))) [2022-11-03 02:00:56,155 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse0) (= |ULTIMATE.start_main_~z~0#1| .cse0))) [2022-11-03 02:00:56,155 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-03 02:00:56,156 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-11-03 02:00:56,156 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 50))) (or (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0 (= |ULTIMATE.start_main_~z~0#1| 0) .cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (and .cse0 (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (<= 0 (+ (* 2 |ULTIMATE.start_main_~y~0#1|) 1)) .cse1 (= (+ (* 2 (* (div (- |ULTIMATE.start_main_~x~0#1|) (- 2)) |ULTIMATE.start_main_~y~0#1|)) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))))) [2022-11-03 02:00:56,156 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-11-03 02:00:56,156 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-11-03 02:00:56,156 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-11-03 02:00:56,156 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-11-03 02:00:56,157 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-11-03 02:00:56,157 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-11-03 02:00:56,157 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-11-03 02:00:56,157 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-11-03 02:00:56,157 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-11-03 02:00:56,161 INFO L444 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1] [2022-11-03 02:00:56,164 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:00:56,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:00:56 BoogieIcfgContainer [2022-11-03 02:00:56,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:00:56,187 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:00:56,187 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:00:56,187 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:00:56,188 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:53:15" (3/4) ... [2022-11-03 02:00:56,191 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-03 02:00:56,196 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-03 02:00:56,196 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-03 02:00:56,201 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-11-03 02:00:56,201 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-03 02:00:56,201 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-03 02:00:56,202 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-03 02:00:56,238 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 02:00:56,239 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:00:56,239 INFO L158 Benchmark]: Toolchain (without parser) took 461417.58ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 52.9MB in the beginning and 105.5MB in the end (delta: -52.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:00:56,240 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 94.4MB. Free memory was 68.9MB in the beginning and 68.9MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:00:56,240 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.89ms. Allocated memory is still 94.4MB. Free memory was 74.0MB in the beginning and 70.3MB in the end (delta: 3.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:00:56,240 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.67ms. Allocated memory is still 94.4MB. Free memory was 70.3MB in the beginning and 68.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:00:56,241 INFO L158 Benchmark]: Boogie Preprocessor took 24.92ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 67.8MB in the end (delta: 950.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:00:56,241 INFO L158 Benchmark]: RCFGBuilder took 399.94ms. Allocated memory is still 94.4MB. Free memory was 67.6MB in the beginning and 55.2MB in the end (delta: 12.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:00:56,242 INFO L158 Benchmark]: TraceAbstraction took 460579.46ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 54.6MB in the beginning and 107.6MB in the end (delta: -53.1MB). Peak memory consumption was 69.3MB. Max. memory is 16.1GB. [2022-11-03 02:00:56,242 INFO L158 Benchmark]: Witness Printer took 51.95ms. Allocated memory is still 138.4MB. Free memory was 107.6MB in the beginning and 105.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:00:56,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 94.4MB. Free memory was 68.9MB in the beginning and 68.9MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.89ms. Allocated memory is still 94.4MB. Free memory was 74.0MB in the beginning and 70.3MB in the end (delta: 3.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.67ms. Allocated memory is still 94.4MB. Free memory was 70.3MB in the beginning and 68.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.92ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 67.8MB in the end (delta: 950.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 399.94ms. Allocated memory is still 94.4MB. Free memory was 67.6MB in the beginning and 55.2MB in the end (delta: 12.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 460579.46ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 54.6MB in the beginning and 107.6MB in the end (delta: -53.1MB). Peak memory consumption was 69.3MB. Max. memory is 16.1GB. * Witness Printer took 51.95ms. Allocated memory is still 138.4MB. Free memory was 107.6MB in the beginning and 105.5MB in the end (delta: 2.1MB). 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 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 460.5s, OverallIterations: 8, TraceHistogramMax: 8, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 77.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 8.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 155 SdHoareTripleChecker+Valid, 49.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 144 mSDsluCounter, 637 SdHoareTripleChecker+Invalid, 48.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 143 IncrementalHoareTripleChecker+Unchecked, 603 mSDsCounter, 111 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1238 IncrementalHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 111 mSolverCounterUnsat, 121 mSDtfsCounter, 1238 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 700 GetRequests, 449 SyntacticMatches, 46 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 284.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=7, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 5 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 22 PreInvPairs, 41 NumberOfFragments, 130 HoareAnnotationTreeSize, 22 FomulaSimplifications, 135 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2365 FormulaSimplificationTreeSizeReductionInter, 8.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 324.4s InterpolantComputationTime, 316 NumberOfCodeBlocks, 312 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 360 ConstructedInterpolants, 11 QuantifiedInterpolants, 4370 SizeOfPredicates, 37 NumberOfNonLiveVariables, 937 ConjunctsInSsa, 242 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 321/544 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((b == y && 1 <= b) && z == 0) && b <= 50) && a == x) || ((((1 <= b && x % 2 == 0) && 0 <= 2 * y + 1) && b <= 50) && 2 * (-x / -2 * y) + z == a * b) RESULT: Ultimate proved your program to be correct! [2022-11-03 02:00:56,456 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-11-03 02:00:56,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0d660d-0f28-49a5-81b4-982518bf3f6c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE