./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound2.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_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/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_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/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_0ae62050-01d9-4de4-8cdc-9e681a7aface/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 69e3759b6e7ee15378e7391ad11d943bae32b67ab55c3e2fea94db5284daa3ec --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:10:50,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:10:50,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:10:50,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:10:50,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:10:50,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:10:50,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:10:50,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:10:50,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:10:50,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:10:50,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:10:50,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:10:50,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:10:50,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:10:50,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:10:50,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:10:50,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:10:50,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:10:50,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:10:50,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:10:50,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:10:50,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:10:50,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:10:50,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:10:50,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:10:50,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:10:50,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:10:50,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:10:50,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:10:50,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:10:50,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:10:50,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:10:50,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:10:50,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:10:50,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:10:50,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:10:50,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:10:50,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:10:50,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:10:50,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:10:50,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:10:50,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:10:50,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:10:50,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:10:50,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:10:50,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:10:50,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:10:50,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:10:50,701 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:10:50,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:10:50,701 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:10:50,702 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:10:50,702 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:10:50,703 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:10:50,703 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:10:50,703 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:10:50,703 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:10:50,704 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:10:50,704 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:10:50,704 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:10:50,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:10:50,705 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:10:50,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:10:50,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:10:50,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:10:50,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:10:50,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:10:50,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:10:50,707 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:10:50,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:10:50,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:10:50,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:10:50,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:10:50,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:10:50,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:10:50,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:10:50,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:10:50,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:10:50,709 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:10:50,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:10:50,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:10:50,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:10:50,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:10:50,710 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_0ae62050-01d9-4de4-8cdc-9e681a7aface/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69e3759b6e7ee15378e7391ad11d943bae32b67ab55c3e2fea94db5284daa3ec [2021-11-25 18:10:51,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:10:51,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:10:51,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:10:51,071 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:10:51,072 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:10:51,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2021-11-25 18:10:51,158 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/data/fe0d41a75/4d62787032c44259b40ba3d820a3dfde/FLAGf662e3720 [2021-11-25 18:10:51,624 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:10:51,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2021-11-25 18:10:51,641 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/data/fe0d41a75/4d62787032c44259b40ba3d820a3dfde/FLAGf662e3720 [2021-11-25 18:10:51,977 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/data/fe0d41a75/4d62787032c44259b40ba3d820a3dfde [2021-11-25 18:10:51,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:10:51,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:10:51,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:10:51,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:10:51,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:10:51,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:10:51" (1/1) ... [2021-11-25 18:10:51,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfed37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:51, skipping insertion in model container [2021-11-25 18:10:51,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:10:51" (1/1) ... [2021-11-25 18:10:51,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:10:52,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:10:52,184 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_0ae62050-01d9-4de4-8cdc-9e681a7aface/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound2.c[520,533] [2021-11-25 18:10:52,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:10:52,206 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:10:52,218 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_0ae62050-01d9-4de4-8cdc-9e681a7aface/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound2.c[520,533] [2021-11-25 18:10:52,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:10:52,238 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:10:52,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52 WrapperNode [2021-11-25 18:10:52,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:10:52,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:10:52,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:10:52,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:10:52,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,272 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2021-11-25 18:10:52,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:10:52,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:10:52,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:10:52,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:10:52,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:10:52,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:10:52,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:10:52,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:10:52,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (1/1) ... [2021-11-25 18:10:52,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:10:52,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:52,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:10:52,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:10:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:10:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:10:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:10:52,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:10:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:10:52,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:10:52,448 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:10:52,450 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:10:52,621 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:10:52,658 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:10:52,658 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:10:52,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:10:52 BoogieIcfgContainer [2021-11-25 18:10:52,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:10:52,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:10:52,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:10:52,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:10:52,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:10:51" (1/3) ... [2021-11-25 18:10:52,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f72ca38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:10:52, skipping insertion in model container [2021-11-25 18:10:52,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:52" (2/3) ... [2021-11-25 18:10:52,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f72ca38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:10:52, skipping insertion in model container [2021-11-25 18:10:52,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:10:52" (3/3) ... [2021-11-25 18:10:52,671 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound2.c [2021-11-25 18:10:52,680 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:10:52,680 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:10:52,745 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:10:52,756 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 18:10:52,756 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:10:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:10:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:10:52,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:52,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:10:52,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1528478615, now seen corresponding path program 1 times [2021-11-25 18:10:52,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:52,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509035342] [2021-11-25 18:10:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:52,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:53,020 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 18:10:53,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:53,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509035342] [2021-11-25 18:10:53,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509035342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:53,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:53,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:10:53,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932834681] [2021-11-25 18:10:53,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:53,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:10:53,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:10:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:10:53,057 INFO L87 Difference]: Start difference. First operand has 17 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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 18:10:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:53,151 INFO L93 Difference]: Finished difference Result 47 states and 80 transitions. [2021-11-25 18:10:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:10:53,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2021-11-25 18:10:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:53,161 INFO L225 Difference]: With dead ends: 47 [2021-11-25 18:10:53,162 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 18:10:53,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 18:10:53,169 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:53,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 73 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:10:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 18:10:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-25 18:10:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:10:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-25 18:10:53,233 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 6 [2021-11-25 18:10:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:53,234 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-25 18:10:53,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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 18:10:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-11-25 18:10:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:10:53,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:53,237 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:53,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:10:53,239 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1925399229, now seen corresponding path program 1 times [2021-11-25 18:10:53,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594757794] [2021-11-25 18:10:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:53,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:53,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:10:53,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429925085] [2021-11-25 18:10:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:53,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:53,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:53,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:53,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:10:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:10:53,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:10:53,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:53,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:53,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594757794] [2021-11-25 18:10:53,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:10:53,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429925085] [2021-11-25 18:10:53,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429925085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:53,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:53,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:10:53,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648820009] [2021-11-25 18:10:53,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:53,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:10:53,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:10:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:10:53,480 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 18:10:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:53,545 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2021-11-25 18:10:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:10:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-11-25 18:10:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:53,547 INFO L225 Difference]: With dead ends: 33 [2021-11-25 18:10:53,548 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 18:10:53,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 18:10:53,550 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:53,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:10:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 18:10:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-11-25 18:10:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 18:10:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-11-25 18:10:53,561 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 11 [2021-11-25 18:10:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:53,561 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-11-25 18:10:53,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 18:10:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-11-25 18:10:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:10:53,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:53,563 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:53,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:53,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:53,778 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:53,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash -983027543, now seen corresponding path program 1 times [2021-11-25 18:10:53,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:53,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5793465] [2021-11-25 18:10:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:53,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:53,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:10:53,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554527319] [2021-11-25 18:10:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:53,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:53,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:53,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:10:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:53,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:10:53,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:10:53,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:53,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:53,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5793465] [2021-11-25 18:10:53,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:10:53,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554527319] [2021-11-25 18:10:53,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554527319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:53,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:53,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:10:53,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172368834] [2021-11-25 18:10:53,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:53,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:10:53,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:10:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:10:53,994 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:10:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:54,038 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-11-25 18:10:54,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:10:54,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-25 18:10:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:54,040 INFO L225 Difference]: With dead ends: 37 [2021-11-25 18:10:54,040 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 18:10:54,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 18:10:54,043 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:54,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:10:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 18:10:54,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-25 18:10:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:10:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-25 18:10:54,052 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 16 [2021-11-25 18:10:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:54,053 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-25 18:10:54,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:10:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-25 18:10:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:10:54,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:54,055 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:54,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:54,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:54,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:54,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:54,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1350514693, now seen corresponding path program 1 times [2021-11-25 18:10:54,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:54,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700504743] [2021-11-25 18:10:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:54,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:54,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:10:54,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721364369] [2021-11-25 18:10:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:54,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:54,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:54,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:54,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:10:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:54,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:10:54,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:10:54,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:10:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:10:54,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:54,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700504743] [2021-11-25 18:10:54,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:10:54,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721364369] [2021-11-25 18:10:54,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721364369] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:54,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:10:54,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-25 18:10:54,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803911769] [2021-11-25 18:10:54,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:54,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:10:54,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:54,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:10:54,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:10:54,640 INFO L87 Difference]: Start difference. First operand 32 states and 37 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:10:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:54,687 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-11-25 18:10:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:10:54,688 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-11-25 18:10:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:54,690 INFO L225 Difference]: With dead ends: 38 [2021-11-25 18:10:54,691 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 18:10:54,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:10:54,696 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:54,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:10:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 18:10:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-25 18:10:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:10:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-25 18:10:54,723 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 23 [2021-11-25 18:10:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:54,725 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-25 18:10:54,725 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:10:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-25 18:10:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:10:54,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:54,728 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:54,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:54,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:54,942 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1426401899, now seen corresponding path program 2 times [2021-11-25 18:10:54,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:54,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678008874] [2021-11-25 18:10:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:54,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:54,953 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:10:54,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120891970] [2021-11-25 18:10:54,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:10:54,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:54,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:54,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:10:55,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:10:55,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:10:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:10:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:10:55,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:10:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:10:55,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:55,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678008874] [2021-11-25 18:10:55,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:10:55,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120891970] [2021-11-25 18:10:55,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120891970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:10:55,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7151531] [2021-11-25 18:10:55,307 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 18:10:55,307 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:10:55,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:10:55,318 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:10:55,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:10:58,847 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-25 18:10:58,856 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:10:59,492 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '844#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:10:59,492 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:10:59,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:10:59,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 18:10:59,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881890833] [2021-11-25 18:10:59,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:10:59,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:10:59,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:10:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:10:59,494 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:10:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:59,645 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-25 18:10:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:10:59,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 28 [2021-11-25 18:10:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:59,648 INFO L225 Difference]: With dead ends: 44 [2021-11-25 18:10:59,648 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 18:10:59,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:10:59,649 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:59,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 57 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:10:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 18:10:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 18:10:59,650 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 18:10:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 18:10:59,650 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-11-25 18:10:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:59,650 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 18:10:59,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:10:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 18:10:59,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 18:10:59,652 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:10:59,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:59,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:59,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 18:11:00,013 INFO L858 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-11-25 18:11:00,013 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 18:11:00,014 INFO L854 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2021-11-25 18:11:00,014 INFO L854 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2021-11-25 18:11:00,014 INFO L861 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2021-11-25 18:11:00,014 INFO L854 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2021-11-25 18:11:00,014 INFO L854 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2021-11-25 18:11:00,014 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 18:11:00,015 INFO L854 garLoopResultBuilder]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2021-11-25 18:11:00,015 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2021-11-25 18:11:00,015 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| 1) (= |ULTIMATE.start_main_~s~0#1| 1))) [2021-11-25 18:11:00,015 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-11-25 18:11:00,015 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-11-25 18:11:00,015 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-11-25 18:11:00,015 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-11-25 18:11:00,016 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-11-25 18:11:00,016 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-11-25 18:11:00,019 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2021-11-25 18:11:00,020 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:11:00,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:11:00 BoogieIcfgContainer [2021-11-25 18:11:00,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:11:00,041 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:11:00,041 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:11:00,041 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:11:00,042 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:10:52" (3/4) ... [2021-11-25 18:11:00,044 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 18:11:00,049 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-25 18:11:00,053 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-11-25 18:11:00,053 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-25 18:11:00,053 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 18:11:00,054 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 18:11:00,093 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:11:00,093 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:11:00,094 INFO L158 Benchmark]: Toolchain (without parser) took 8113.27ms. Allocated memory was 94.4MB in the beginning and 207.6MB in the end (delta: 113.2MB). Free memory was 58.7MB in the beginning and 125.4MB in the end (delta: -66.7MB). Peak memory consumption was 46.8MB. Max. memory is 16.1GB. [2021-11-25 18:11:00,095 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 94.4MB. Free memory was 66.5MB in the beginning and 66.4MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:11:00,095 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.92ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 58.4MB in the beginning and 91.7MB in the end (delta: -33.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:11:00,095 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.84ms. Allocated memory is still 117.4MB. Free memory was 91.7MB in the beginning and 90.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:11:00,096 INFO L158 Benchmark]: Boogie Preprocessor took 21.46ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 89.6MB in the end (delta: 868.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:11:00,096 INFO L158 Benchmark]: RCFGBuilder took 365.46ms. Allocated memory is still 117.4MB. Free memory was 89.6MB in the beginning and 79.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:11:00,097 INFO L158 Benchmark]: TraceAbstraction took 7378.14ms. Allocated memory was 117.4MB in the beginning and 207.6MB in the end (delta: 90.2MB). Free memory was 78.5MB in the beginning and 129.6MB in the end (delta: -51.1MB). Peak memory consumption was 41.4MB. Max. memory is 16.1GB. [2021-11-25 18:11:00,097 INFO L158 Benchmark]: Witness Printer took 52.61ms. Allocated memory is still 207.6MB. Free memory was 129.6MB in the beginning and 125.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:11:00,099 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 94.4MB. Free memory was 66.5MB in the beginning and 66.4MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.92ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 58.4MB in the beginning and 91.7MB in the end (delta: -33.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.84ms. Allocated memory is still 117.4MB. Free memory was 91.7MB in the beginning and 90.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.46ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 89.6MB in the end (delta: 868.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 365.46ms. Allocated memory is still 117.4MB. Free memory was 89.6MB in the beginning and 79.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7378.14ms. Allocated memory was 117.4MB in the beginning and 207.6MB in the end (delta: 90.2MB). Free memory was 78.5MB in the beginning and 129.6MB in the end (delta: -51.1MB). Peak memory consumption was 41.4MB. Max. memory is 16.1GB. * Witness Printer took 52.61ms. Allocated memory is still 207.6MB. Free memory was 129.6MB in the beginning and 125.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.3s, OverallIterations: 5, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36 mSDsluCounter, 316 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 239 mSDsCounter, 41 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 196 IncrementalHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 41 mSolverCounterUnsat, 90 mSDtfsCounter, 196 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 28, 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, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 32 PreInvPairs, 55 NumberOfFragments, 136 HoareAnnotationTreeSize, 32 FomulaSimplifications, 5 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 392 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 84 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 453 SizeOfPredicates, 5 NumberOfNonLiveVariables, 280 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 112/120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && a * a + 1 + 2 * a == s - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-25 18:11:00,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae62050-01d9-4de4-8cdc-9e681a7aface/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