./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7 --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 ee8fbf7ad7c769bb660b4c416c89e8a6070f0c88820552e25f4a5ca5398fd5ca --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:41:13,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:41:13,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:41:13,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:41:13,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:41:13,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:41:13,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:41:13,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:41:13,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:41:13,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:41:13,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:41:13,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:41:13,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:41:13,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:41:13,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:41:13,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:41:13,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:41:13,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:41:13,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:41:13,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:41:13,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:41:13,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:41:13,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:41:13,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:41:13,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:41:13,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:41:13,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:41:13,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:41:13,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:41:13,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:41:13,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:41:13,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:41:13,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:41:13,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:41:13,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:41:13,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:41:13,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:41:13,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:41:13,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:41:13,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:41:13,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:41:13,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:41:13,528 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:41:13,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:41:13,529 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:41:13,529 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:41:13,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:41:13,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:41:13,541 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:41:13,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:41:13,541 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:41:13,541 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:41:13,542 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:41:13,542 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:41:13,543 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:41:13,543 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:41:13,543 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:41:13,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:41:13,543 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:41:13,543 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:41:13,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:41:13,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:41:13,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:41:13,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:41:13,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:41:13,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:41:13,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:41:13,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:41:13,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:41:13,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:41:13,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:41:13,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:41:13,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:41:13,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:41:13,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:41:13,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:41:13,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:41:13,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:41:13,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:41:13,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:41:13,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:41:13,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:41:13,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:41:13,551 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee8fbf7ad7c769bb660b4c416c89e8a6070f0c88820552e25f4a5ca5398fd5ca [2021-11-25 19:41:13,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:41:13,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:41:13,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:41:13,857 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:41:13,858 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:41:13,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2021-11-25 19:41:13,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/data/61b08edd0/2a0b1356b3254d69967ac1e6eabd81df/FLAG6660d67e2 [2021-11-25 19:41:14,502 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:41:14,507 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2021-11-25 19:41:14,519 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/data/61b08edd0/2a0b1356b3254d69967ac1e6eabd81df/FLAG6660d67e2 [2021-11-25 19:41:14,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/data/61b08edd0/2a0b1356b3254d69967ac1e6eabd81df [2021-11-25 19:41:14,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:41:14,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:41:14,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:41:14,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:41:14,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:41:14,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:41:14" (1/1) ... [2021-11-25 19:41:14,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@666879ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:14, skipping insertion in model container [2021-11-25 19:41:14,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:41:14" (1/1) ... [2021-11-25 19:41:14,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:41:14,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:41:15,093 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_4dc933bd-42d3-4bec-84da-181af663cdd2/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c[525,538] [2021-11-25 19:41:15,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:41:15,129 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:41:15,143 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_4dc933bd-42d3-4bec-84da-181af663cdd2/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c[525,538] [2021-11-25 19:41:15,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:41:15,188 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:41:15,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15 WrapperNode [2021-11-25 19:41:15,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:41:15,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:41:15,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:41:15,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:41:15,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,246 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-25 19:41:15,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:41:15,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:41:15,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:41:15,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:41:15,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:41:15,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:41:15,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:41:15,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:41:15,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (1/1) ... [2021-11-25 19:41:15,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:41:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:15,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:41:15,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:41:15,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:41:15,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:41:15,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:41:15,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:41:15,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 19:41:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 19:41:15,436 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:41:15,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:41:15,642 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:41:15,686 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:41:15,687 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:41:15,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:41:15 BoogieIcfgContainer [2021-11-25 19:41:15,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:41:15,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:41:15,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:41:15,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:41:15,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:41:14" (1/3) ... [2021-11-25 19:41:15,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39701ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:41:15, skipping insertion in model container [2021-11-25 19:41:15,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:15" (2/3) ... [2021-11-25 19:41:15,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39701ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:41:15, skipping insertion in model container [2021-11-25 19:41:15,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:41:15" (3/3) ... [2021-11-25 19:41:15,698 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound2.c [2021-11-25 19:41:15,703 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:41:15,703 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:41:15,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:41:15,783 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:41:15,783 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:41:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 19:41:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:41:15,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:15,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:15,818 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash -678335095, now seen corresponding path program 1 times [2021-11-25 19:41:15,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:15,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759642649] [2021-11-25 19:41:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:15,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:15,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:15,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759642649] [2021-11-25 19:41:15,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759642649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:15,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:15,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:41:16,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209370477] [2021-11-25 19:41:16,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:16,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:41:16,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:41:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:41:16,035 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:16,068 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2021-11-25 19:41:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:41:16,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 19:41:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:16,079 INFO L225 Difference]: With dead ends: 44 [2021-11-25 19:41:16,079 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 19:41:16,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:41:16,087 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:16,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:16,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 19:41:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 19:41:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:41:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-11-25 19:41:16,126 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2021-11-25 19:41:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:16,126 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-11-25 19:41:16,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-11-25 19:41:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:41:16,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:16,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:16,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:41:16,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:16,130 INFO L85 PathProgramCache]: Analyzing trace with hash 520368722, now seen corresponding path program 1 times [2021-11-25 19:41:16,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:16,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766159258] [2021-11-25 19:41:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:16,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:16,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766159258] [2021-11-25 19:41:16,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766159258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:16,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:16,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:41:16,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560583097] [2021-11-25 19:41:16,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:16,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:41:16,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:16,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:41:16,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:41:16,209 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:16,259 INFO L93 Difference]: Finished difference Result 42 states and 63 transitions. [2021-11-25 19:41:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:41:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:41:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:16,261 INFO L225 Difference]: With dead ends: 42 [2021-11-25 19:41:16,261 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:41:16,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:41:16,264 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:16,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:41:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 19:41:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:41:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2021-11-25 19:41:16,274 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 9 [2021-11-25 19:41:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:16,275 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2021-11-25 19:41:16,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:16,275 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2021-11-25 19:41:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:41:16,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:16,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:16,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:41:16,277 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1389535714, now seen corresponding path program 1 times [2021-11-25 19:41:16,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:16,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438114300] [2021-11-25 19:41:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:16,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:16,294 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:41:16,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690915365] [2021-11-25 19:41:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:16,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:16,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:16,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:16,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:41:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:16,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:41:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:16,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:41:16,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:16,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438114300] [2021-11-25 19:41:16,462 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:41:16,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690915365] [2021-11-25 19:41:16,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690915365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:16,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:16,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:41:16,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530862234] [2021-11-25 19:41:16,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:16,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:16,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:16,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:16,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:16,471 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:18,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:18,532 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-11-25 19:41:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:41:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:41:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:18,641 INFO L225 Difference]: With dead ends: 37 [2021-11-25 19:41:18,641 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 19:41:18,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:18,643 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:18,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 86 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 19:41:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 19:41:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-25 19:41:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:41:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2021-11-25 19:41:18,652 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 10 [2021-11-25 19:41:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:18,653 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2021-11-25 19:41:18,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2021-11-25 19:41:18,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:41:18,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:18,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:18,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:41:18,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:18,882 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:18,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1388046164, now seen corresponding path program 1 times [2021-11-25 19:41:18,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:18,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763068374] [2021-11-25 19:41:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:18,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:19,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:19,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763068374] [2021-11-25 19:41:19,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763068374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:19,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:19,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:41:19,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022586655] [2021-11-25 19:41:19,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:19,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:41:19,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:19,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:41:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:41:19,116 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:21,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:23,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 19:41:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:23,606 INFO L93 Difference]: Finished difference Result 59 states and 89 transitions. [2021-11-25 19:41:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:41:23,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:41:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:23,607 INFO L225 Difference]: With dead ends: 59 [2021-11-25 19:41:23,607 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 19:41:23,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:41:23,609 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:23,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 60 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 19:41:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 19:41:23,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-25 19:41:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 19:41:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2021-11-25 19:41:23,619 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 10 [2021-11-25 19:41:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:23,619 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2021-11-25 19:41:23,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2021-11-25 19:41:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:41:23,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:23,621 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:23,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:41:23,621 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:23,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1970023331, now seen corresponding path program 1 times [2021-11-25 19:41:23,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:23,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660439185] [2021-11-25 19:41:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:23,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:23,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:41:23,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867973927] [2021-11-25 19:41:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:23,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:23,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:23,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:23,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:41:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:41:23,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:23,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:41:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:23,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660439185] [2021-11-25 19:41:23,789 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:41:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867973927] [2021-11-25 19:41:23,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867973927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:41:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911385337] [2021-11-25 19:41:23,807 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 19:41:23,808 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:41:23,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:41:23,818 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:41:23,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:41:24,217 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2021-11-25 19:41:24,226 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:41:24,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1911385337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:24,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:41:24,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 12 [2021-11-25 19:41:24,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130831892] [2021-11-25 19:41:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:24,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:41:24,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:41:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:41:24,566 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:25,086 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2021-11-25 19:41:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:41:25,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 19:41:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:25,088 INFO L225 Difference]: With dead ends: 78 [2021-11-25 19:41:25,088 INFO L226 Difference]: Without dead ends: 59 [2021-11-25 19:41:25,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:41:25,090 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:25,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 108 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:41:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-25 19:41:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2021-11-25 19:41:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 19:41:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-11-25 19:41:25,111 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 12 [2021-11-25 19:41:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:25,112 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-11-25 19:41:25,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-11-25 19:41:25,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:41:25,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:25,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:25,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:41:25,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:25,330 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash 600084205, now seen corresponding path program 1 times [2021-11-25 19:41:25,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:25,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385394196] [2021-11-25 19:41:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:25,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:25,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:41:25,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122913312] [2021-11-25 19:41:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:25,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:25,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:25,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:25,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:41:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:41:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:41:25,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:41:25,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:25,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385394196] [2021-11-25 19:41:25,513 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:41:25,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122913312] [2021-11-25 19:41:25,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122913312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:25,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:25,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:41:25,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105456243] [2021-11-25 19:41:25,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:25,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:25,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:25,516 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:27,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:28,351 INFO L93 Difference]: Finished difference Result 69 states and 94 transitions. [2021-11-25 19:41:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:41:28,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 19:41:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:28,353 INFO L225 Difference]: With dead ends: 69 [2021-11-25 19:41:28,353 INFO L226 Difference]: Without dead ends: 48 [2021-11-25 19:41:28,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:41:28,355 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:28,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:41:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-25 19:41:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-25 19:41:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.28) internal successors, (32), 28 states have internal predecessors, (32), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 19:41:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2021-11-25 19:41:28,371 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 13 [2021-11-25 19:41:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:28,371 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2021-11-25 19:41:28,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2021-11-25 19:41:28,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:41:28,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:28,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:28,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:41:28,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:28,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash 601573755, now seen corresponding path program 1 times [2021-11-25 19:41:28,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:28,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89934033] [2021-11-25 19:41:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:28,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:28,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:28,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89934033] [2021-11-25 19:41:28,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89934033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:41:28,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597671833] [2021-11-25 19:41:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:28,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:28,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:28,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:28,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:41:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:28,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:41:28,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:28,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:41:28,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597671833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:28,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:41:28,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-25 19:41:28,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537783949] [2021-11-25 19:41:28,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:28,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:41:28,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:28,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:41:28,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:41:28,794 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:28,835 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-11-25 19:41:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:41:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 19:41:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:28,838 INFO L225 Difference]: With dead ends: 60 [2021-11-25 19:41:28,838 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:41:28,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:41:28,841 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:28,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:41:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-25 19:41:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:41:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-25 19:41:28,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2021-11-25 19:41:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:28,847 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-25 19:41:28,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-25 19:41:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:41:28,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:28,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:28,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:41:29,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:41:29,074 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1700427874, now seen corresponding path program 1 times [2021-11-25 19:41:29,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:29,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937085714] [2021-11-25 19:41:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:29,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:29,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:41:29,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539016594] [2021-11-25 19:41:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:29,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:29,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:29,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:29,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:41:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:29,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:41:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:41:29,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:41:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:29,253 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:29,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937085714] [2021-11-25 19:41:29,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:41:29,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539016594] [2021-11-25 19:41:29,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539016594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:41:29,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590856434] [2021-11-25 19:41:29,257 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:41:29,257 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:41:29,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:41:29,258 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:41:29,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:41:29,500 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2021-11-25 19:41:29,615 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:41:30,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1264#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 4 ~counter~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:41:30,213 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:41:30,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:41:30,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-11-25 19:41:30,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365979058] [2021-11-25 19:41:30,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:41:30,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:30,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:41:30,215 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:41:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:30,245 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-11-25 19:41:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:41:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-25 19:41:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:30,249 INFO L225 Difference]: With dead ends: 33 [2021-11-25 19:41:30,249 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 19:41:30,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:41:30,251 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:30,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 19:41:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 19:41:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:41:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-25 19:41:30,259 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2021-11-25 19:41:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:30,260 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-25 19:41:30,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:41:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-25 19:41:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:41:30,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:30,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:30,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:41:30,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:41:30,486 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1856396652, now seen corresponding path program 1 times [2021-11-25 19:41:30,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:30,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790712866] [2021-11-25 19:41:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:30,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:30,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:41:30,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515403835] [2021-11-25 19:41:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:30,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:30,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:30,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:30,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:41:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:30,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:41:30,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:41:30,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:41:30,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:30,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790712866] [2021-11-25 19:41:30,643 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:41:30,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515403835] [2021-11-25 19:41:30,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515403835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:30,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:30,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:41:30,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546159058] [2021-11-25 19:41:30,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:30,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:30,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:30,647 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:41:30,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:30,675 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-11-25 19:41:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:41:30,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-25 19:41:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:30,676 INFO L225 Difference]: With dead ends: 21 [2021-11-25 19:41:30,676 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 19:41:30,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:41:30,679 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:30,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 19:41:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 19:41:30,682 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) [2021-11-25 19:41:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 19:41:30,683 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-11-25 19:41:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:30,683 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 19:41:30,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:41:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 19:41:30,684 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 19:41:30,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:41:30,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:41:30,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:30,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 19:41:31,590 INFO L858 garLoopResultBuilder]: For program point L31(lines 31 32) no Hoare annotation was computed. [2021-11-25 19:41:31,590 INFO L858 garLoopResultBuilder]: For program point L52-2(lines 20 61) no Hoare annotation was computed. [2021-11-25 19:41:31,590 INFO L858 garLoopResultBuilder]: For program point L44(lines 38 56) no Hoare annotation was computed. [2021-11-25 19:41:31,591 INFO L854 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 0 ~counter~0) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0)) [2021-11-25 19:41:31,591 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 19:41:31,591 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~p~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|))) (or (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) .cse0 (= |ULTIMATE.start_main_~q~0#1| 1) .cse1) (and (<= 2 ~counter~0) .cse0 (= |ULTIMATE.start_main_~h~0#1| 0) .cse1))) [2021-11-25 19:41:31,591 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 0 ~counter~0) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0)) [2021-11-25 19:41:31,591 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 19:41:31,591 INFO L854 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~p~0#1| 0))) (or (and .cse0 (= |ULTIMATE.start_main_~h~0#1| 0)) (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) .cse0 (= |ULTIMATE.start_main_~q~0#1| 1) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|)))) [2021-11-25 19:41:31,592 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 0 ~counter~0) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0)) [2021-11-25 19:41:31,592 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 56) no Hoare annotation was computed. [2021-11-25 19:41:31,592 INFO L854 garLoopResultBuilder]: At program point L38-2(lines 38 56) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~p~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~h~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|))) (or (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) .cse0 (<= 0 ~counter~0) .cse1 (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) .cse2 (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0)) (and (<= 2 ~counter~0) .cse0 .cse1 .cse2))) [2021-11-25 19:41:31,592 INFO L858 garLoopResultBuilder]: For program point L30-1(lines 30 35) no Hoare annotation was computed. [2021-11-25 19:41:31,592 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 35) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~p~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~h~0#1| 0)) (.cse2 (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) (.cse3 (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse4 (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse5 (= |#NULL.offset| 0)) (.cse6 (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1)) (.cse7 (<= 0 |#StackHeapBarrier|)) (.cse8 (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse9 (= |#NULL.base| 0))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~q~0#1| 1) .cse2 .cse3 (= ~counter~0 0) .cse4 .cse5 .cse6 .cse7 .cse8 .cse9) (and .cse0 .cse1 (<= 1 ~counter~0) .cse2 .cse3 .cse4 .cse5 .cse6 (< ~counter~0 3) .cse7 .cse8 .cse9))) [2021-11-25 19:41:31,592 INFO L861 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2021-11-25 19:41:31,593 INFO L854 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 0 ~counter~0) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0)) [2021-11-25 19:41:31,593 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 0 ~counter~0) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0)) [2021-11-25 19:41:31,593 INFO L854 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 0 ~counter~0) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0)) [2021-11-25 19:41:31,593 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-11-25 19:41:31,593 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-11-25 19:41:31,593 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-11-25 19:41:31,594 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-11-25 19:41:31,594 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-11-25 19:41:31,594 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-11-25 19:41:31,597 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:31,598 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:41:31,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:41:31 BoogieIcfgContainer [2021-11-25 19:41:31,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:41:31,617 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:41:31,617 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:41:31,617 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:41:31,617 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:41:15" (3/4) ... [2021-11-25 19:41:31,620 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:41:31,626 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-25 19:41:31,630 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-25 19:41:31,630 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-25 19:41:31,631 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 19:41:31,631 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:41:31,653 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((p == 0 && h == 0) && q == 1) && 0 <= \old(cond)) && 0 <= cond) && counter == 0) && n == r) && #NULL == 0) && \old(cond) <= 1) && 0 <= unknown-#StackHeapBarrier-unknown) && cond <= 1) && #NULL == 0) || (((((((((((p == 0 && h == 0) && 1 <= counter) && 0 <= \old(cond)) && 0 <= cond) && n == r) && #NULL == 0) && \old(cond) <= 1) && counter < 3) && 0 <= unknown-#StackHeapBarrier-unknown) && cond <= 1) && #NULL == 0) [2021-11-25 19:41:31,666 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:41:31,666 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:41:31,667 INFO L158 Benchmark]: Toolchain (without parser) took 16812.89ms. Allocated memory was 104.9MB in the beginning and 127.9MB in the end (delta: 23.1MB). Free memory was 67.2MB in the beginning and 86.1MB in the end (delta: -18.9MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. [2021-11-25 19:41:31,667 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 104.9MB. Free memory is still 83.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:41:31,668 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.29ms. Allocated memory is still 104.9MB. Free memory was 67.0MB in the beginning and 78.4MB in the end (delta: -11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:41:31,668 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.71ms. Allocated memory is still 104.9MB. Free memory was 78.4MB in the beginning and 76.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:41:31,668 INFO L158 Benchmark]: Boogie Preprocessor took 21.07ms. Allocated memory is still 104.9MB. Free memory was 76.7MB in the beginning and 75.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:41:31,669 INFO L158 Benchmark]: RCFGBuilder took 417.68ms. Allocated memory is still 104.9MB. Free memory was 75.5MB in the beginning and 62.9MB in the end (delta: 12.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-25 19:41:31,669 INFO L158 Benchmark]: TraceAbstraction took 15925.31ms. Allocated memory was 104.9MB in the beginning and 127.9MB in the end (delta: 23.1MB). Free memory was 62.5MB in the beginning and 90.3MB in the end (delta: -27.9MB). Peak memory consumption was 52.8MB. Max. memory is 16.1GB. [2021-11-25 19:41:31,670 INFO L158 Benchmark]: Witness Printer took 49.84ms. Allocated memory is still 127.9MB. Free memory was 90.3MB in the beginning and 86.1MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:41:31,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 104.9MB. Free memory is still 83.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.29ms. Allocated memory is still 104.9MB. Free memory was 67.0MB in the beginning and 78.4MB in the end (delta: -11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.71ms. Allocated memory is still 104.9MB. Free memory was 78.4MB in the beginning and 76.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.07ms. Allocated memory is still 104.9MB. Free memory was 76.7MB in the beginning and 75.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 417.68ms. Allocated memory is still 104.9MB. Free memory was 75.5MB in the beginning and 62.9MB in the end (delta: 12.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 15925.31ms. Allocated memory was 104.9MB in the beginning and 127.9MB in the end (delta: 23.1MB). Free memory was 62.5MB in the beginning and 90.3MB in the end (delta: -27.9MB). Peak memory consumption was 52.8MB. Max. memory is 16.1GB. * Witness Printer took 49.84ms. Allocated memory is still 127.9MB. Free memory was 90.3MB in the beginning and 86.1MB in the end (delta: 4.2MB). 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: 14]: 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 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.8s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 10.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 65 SdHoareTripleChecker+Valid, 9.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47 mSDsluCounter, 692 SdHoareTripleChecker+Invalid, 9.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 468 mSDsCounter, 43 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 292 IncrementalHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 43 mSolverCounterUnsat, 236 mSDtfsCounter, 292 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=5, InterpolantAutomatonStates: 50, 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, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 82 PreInvPairs, 98 NumberOfFragments, 617 HoareAnnotationTreeSize, 82 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 337 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 479 SizeOfPredicates, 7 NumberOfNonLiveVariables, 416 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 12 InterpolantComputations, 7 PerfectInterpolantSequences, 16/26 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: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 17, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 1, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 18, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 36, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 63, DAG_COMPRESSION_RETAINED_NODES: 35, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((((((((((p == 0 && h == 0) && q == 1) && 0 <= \old(cond)) && 0 <= cond) && counter == 0) && n == r) && #NULL == 0) && \old(cond) <= 1) && 0 <= unknown-#StackHeapBarrier-unknown) && cond <= 1) && #NULL == 0) || (((((((((((p == 0 && h == 0) && 1 <= counter) && 0 <= \old(cond)) && 0 <= cond) && n == r) && #NULL == 0) && \old(cond) <= 1) && counter < 3) && 0 <= unknown-#StackHeapBarrier-unknown) && cond <= 1) && #NULL == 0) RESULT: Ultimate proved your program to be correct! [2021-11-25 19:41:31,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc933bd-42d3-4bec-84da-181af663cdd2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE