./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs --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 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:33:40,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:33:40,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:33:40,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:33:40,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:33:40,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:33:40,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:33:40,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:33:40,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:33:40,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:33:40,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:33:40,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:33:40,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:33:40,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:33:40,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:33:40,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:33:40,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:33:40,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:33:40,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:33:40,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:33:40,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:33:40,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:33:40,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:33:40,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:33:40,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:33:40,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:33:40,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:33:40,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:33:40,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:33:40,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:33:40,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:33:40,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:33:40,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:33:40,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:33:40,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:33:40,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:33:40,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:33:40,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:33:40,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:33:40,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:33:40,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:33:40,535 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:33:40,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:33:40,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:33:40,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:33:40,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:33:40,581 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:33:40,581 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:33:40,582 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:33:40,582 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:33:40,582 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:33:40,582 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:33:40,589 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:33:40,590 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:33:40,590 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:33:40,590 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:33:40,590 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:33:40,591 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:33:40,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:33:40,592 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:33:40,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:33:40,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:33:40,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:33:40,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:33:40,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:33:40,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:33:40,593 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:33:40,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:33:40,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:33:40,594 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:33:40,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:33:40,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:33:40,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:33:40,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:40,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:33:40,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:33:40,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:33:40,598 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:33:40,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:33:40,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:33:40,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:33:40,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:33:40,599 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_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2021-11-19 14:33:40,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:33:40,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:33:40,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:33:40,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:33:40,872 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:33:40,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2021-11-19 14:33:40,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data/ea31e2ae7/da43f4c827214e65939f23049e7e03a9/FLAG271c04743 [2021-11-19 14:33:41,418 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:33:41,419 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2021-11-19 14:33:41,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data/ea31e2ae7/da43f4c827214e65939f23049e7e03a9/FLAG271c04743 [2021-11-19 14:33:41,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data/ea31e2ae7/da43f4c827214e65939f23049e7e03a9 [2021-11-19 14:33:41,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:33:41,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:33:41,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:41,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:33:41,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:33:41,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:41" (1/1) ... [2021-11-19 14:33:41,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782f6cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:41, skipping insertion in model container [2021-11-19 14:33:41,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:41" (1/1) ... [2021-11-19 14:33:41,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:33:41,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:33:42,017 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_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2021-11-19 14:33:42,043 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:42,050 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:33:42,062 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_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2021-11-19 14:33:42,073 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:42,086 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:33:42,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42 WrapperNode [2021-11-19 14:33:42,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:42,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:33:42,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:33:42,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:33:42,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,121 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2021-11-19 14:33:42,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:33:42,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:33:42,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:33:42,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:33:42,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:33:42,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:33:42,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:33:42,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:33:42,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (1/1) ... [2021-11-19 14:33:42,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:42,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:42,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:33:42,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:33:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:33:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:33:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:33:42,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:33:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:33:42,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:33:42,300 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:33:42,302 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:33:42,470 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:33:42,482 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:33:42,487 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:33:42,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:33:42 BoogieIcfgContainer [2021-11-19 14:33:42,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:33:42,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:33:42,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:33:42,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:33:42,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:33:41" (1/3) ... [2021-11-19 14:33:42,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b92627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:33:42, skipping insertion in model container [2021-11-19 14:33:42,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:42" (2/3) ... [2021-11-19 14:33:42,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b92627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:33:42, skipping insertion in model container [2021-11-19 14:33:42,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:33:42" (3/3) ... [2021-11-19 14:33:42,500 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2021-11-19 14:33:42,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:33:42,511 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:33:42,568 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:33:42,575 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 [2021-11-19 14:33:42,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:33:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-11-19 14:33:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 14:33:42,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:42,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 14:33:42,602 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2021-11-19 14:33:42,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:33:42,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53125588] [2021-11-19 14:33:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:42,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:33:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:42,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:33:42,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53125588] [2021-11-19 14:33:42,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53125588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:42,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:42,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:33:42,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249620311] [2021-11-19 14:33:42,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:42,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:33:42,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:33:42,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:33:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:33:42,829 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-19 14:33:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:42,872 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2021-11-19 14:33:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:33:42,875 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-11-19 14:33:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:42,884 INFO L225 Difference]: With dead ends: 35 [2021-11-19 14:33:42,884 INFO L226 Difference]: Without dead ends: 16 [2021-11-19 14:33:42,888 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 [2021-11-19 14:33:42,894 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:42,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:33:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-19 14:33:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-19 14:33:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 14:33:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-11-19 14:33:42,945 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2021-11-19 14:33:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:42,945 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-11-19 14:33:42,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-19 14:33:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-11-19 14:33:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 14:33:42,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:42,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:42,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:33:42,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:42,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:42,953 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2021-11-19 14:33:42,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:33:42,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421010903] [2021-11-19 14:33:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:42,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:33:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:43,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:33:43,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421010903] [2021-11-19 14:33:43,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421010903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:43,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:43,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:33:43,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063774850] [2021-11-19 14:33:43,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:43,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:33:43,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:33:43,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:33:43,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:33:43,061 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2021-11-19 14:33:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:43,080 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-19 14:33:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:33:43,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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 [2021-11-19 14:33:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:43,082 INFO L225 Difference]: With dead ends: 27 [2021-11-19 14:33:43,082 INFO L226 Difference]: Without dead ends: 18 [2021-11-19 14:33:43,083 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 [2021-11-19 14:33:43,084 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:43,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:33:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-19 14:33:43,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-19 14:33:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 14:33:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-19 14:33:43,092 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2021-11-19 14:33:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:43,093 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-19 14:33:43,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2021-11-19 14:33:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-19 14:33:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 14:33:43,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:43,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:43,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:33:43,095 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2021-11-19 14:33:43,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:33:43,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679345843] [2021-11-19 14:33:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:43,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:33:43,106 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 14:33:43,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825106538] [2021-11-19 14:33:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:43,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:33:43,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:43,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:33:43,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:33:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:33:43,220 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:33:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:33:43,255 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:33:43,256 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:33:43,258 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:33:43,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:43,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:33:43,470 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-19 14:33:43,472 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:33:43,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:33:43 BoogieIcfgContainer [2021-11-19 14:33:43,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:33:43,494 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:33:43,494 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:33:43,495 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:33:43,495 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:33:42" (3/4) ... [2021-11-19 14:33:43,498 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 14:33:43,498 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:33:43,499 INFO L158 Benchmark]: Toolchain (without parser) took 1682.59ms. Allocated memory is still 111.1MB. Free memory was 76.5MB in the beginning and 42.5MB in the end (delta: 34.0MB). Peak memory consumption was 30.9MB. Max. memory is 16.1GB. [2021-11-19 14:33:43,499 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 111.1MB. Free memory was 84.8MB in the beginning and 84.8MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:33:43,500 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.41ms. Allocated memory is still 111.1MB. Free memory was 76.3MB in the beginning and 85.7MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:33:43,501 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.20ms. Allocated memory is still 111.1MB. Free memory was 85.7MB in the beginning and 84.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:33:43,501 INFO L158 Benchmark]: Boogie Preprocessor took 21.82ms. Allocated memory is still 111.1MB. Free memory was 84.4MB in the beginning and 83.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:33:43,502 INFO L158 Benchmark]: RCFGBuilder took 345.42ms. Allocated memory is still 111.1MB. Free memory was 83.0MB in the beginning and 73.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:33:43,502 INFO L158 Benchmark]: TraceAbstraction took 1001.38ms. Allocated memory is still 111.1MB. Free memory was 73.2MB in the beginning and 42.5MB in the end (delta: 30.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-19 14:33:43,503 INFO L158 Benchmark]: Witness Printer took 3.86ms. Allocated memory is still 111.1MB. Free memory is still 42.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:33:43,506 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 111.1MB. Free memory was 84.8MB in the beginning and 84.8MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.41ms. Allocated memory is still 111.1MB. Free memory was 76.3MB in the beginning and 85.7MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.20ms. Allocated memory is still 111.1MB. Free memory was 85.7MB in the beginning and 84.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.82ms. Allocated memory is still 111.1MB. Free memory was 84.4MB in the beginning and 83.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 345.42ms. Allocated memory is still 111.1MB. Free memory was 83.0MB in the beginning and 73.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1001.38ms. Allocated memory is still 111.1MB. Free memory was 73.2MB in the beginning and 42.5MB in the end (delta: 30.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Witness Printer took 3.86ms. Allocated memory is still 111.1MB. Free memory is still 42.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 78 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 41 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-19 14:33:43,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs --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 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:33:45,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:33:45,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:33:45,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:33:45,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:33:45,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:33:45,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:33:45,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:33:45,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:33:45,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:33:45,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:33:45,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:33:45,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:33:45,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:33:45,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:33:45,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:33:45,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:33:45,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:33:45,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:33:45,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:33:45,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:33:45,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:33:45,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:33:45,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:33:45,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:33:45,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:33:45,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:33:45,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:33:45,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:33:45,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:33:45,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:33:45,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:33:45,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:33:45,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:33:45,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:33:45,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:33:45,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:33:45,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:33:45,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:33:45,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:33:45,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:33:45,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:33:45,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:33:45,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:33:45,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:33:45,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:33:45,946 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:33:45,946 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:33:45,947 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:33:45,947 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:33:45,947 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:33:45,947 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:33:45,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:33:45,948 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:33:45,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:33:45,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:33:45,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:33:45,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:33:45,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:33:45,949 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:33:45,949 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:33:45,950 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:33:45,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:33:45,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:33:45,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:33:45,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:33:45,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:33:45,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:33:45,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:33:45,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:45,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:33:45,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:33:45,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:33:45,952 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:33:45,952 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:45,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:33:45,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:33:45,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:33:45,953 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2021-11-19 14:33:46,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:33:46,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:33:46,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:33:46,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:33:46,349 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:33:46,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2021-11-19 14:33:46,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data/3d1d86f6e/5ac6cb5986c74670b5c0e27263b4f386/FLAG3ce199744 [2021-11-19 14:33:46,927 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:33:46,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2021-11-19 14:33:46,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data/3d1d86f6e/5ac6cb5986c74670b5c0e27263b4f386/FLAG3ce199744 [2021-11-19 14:33:47,297 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/data/3d1d86f6e/5ac6cb5986c74670b5c0e27263b4f386 [2021-11-19 14:33:47,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:33:47,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:33:47,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:47,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:33:47,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:33:47,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0a0e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47, skipping insertion in model container [2021-11-19 14:33:47,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:33:47,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:33:47,488 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_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2021-11-19 14:33:47,524 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:47,542 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:33:47,566 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_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2021-11-19 14:33:47,593 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:47,618 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:33:47,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47 WrapperNode [2021-11-19 14:33:47,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:47,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:33:47,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:33:47,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:33:47,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,658 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2021-11-19 14:33:47,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:33:47,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:33:47,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:33:47,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:33:47,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:33:47,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:33:47,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:33:47,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:33:47,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (1/1) ... [2021-11-19 14:33:47,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:47,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:47,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:33:47,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:33:47,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:33:47,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:33:47,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:33:47,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:33:47,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:33:47,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:33:47,841 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:33:47,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:33:50,163 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:33:50,168 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:33:50,169 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:33:50,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:33:50 BoogieIcfgContainer [2021-11-19 14:33:50,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:33:50,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:33:50,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:33:50,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:33:50,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:33:47" (1/3) ... [2021-11-19 14:33:50,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e60254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:33:50, skipping insertion in model container [2021-11-19 14:33:50,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:47" (2/3) ... [2021-11-19 14:33:50,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e60254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:33:50, skipping insertion in model container [2021-11-19 14:33:50,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:33:50" (3/3) ... [2021-11-19 14:33:50,179 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2021-11-19 14:33:50,184 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:33:50,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:33:50,241 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:33:50,248 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 [2021-11-19 14:33:50,248 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:33:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-11-19 14:33:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 14:33:50,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:50,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:50,268 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2021-11-19 14:33:50,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:50,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025549480] [2021-11-19 14:33:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:50,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:50,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:50,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:50,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:33:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:33:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:50,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:50,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:50,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025549480] [2021-11-19 14:33:50,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025549480] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:50,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:50,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:33:50,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379228468] [2021-11-19 14:33:50,688 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:50,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:33:50,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:33:50,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:33:50,731 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 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) [2021-11-19 14:33:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:50,762 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2021-11-19 14:33:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:33:50,764 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 [2021-11-19 14:33:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:50,772 INFO L225 Difference]: With dead ends: 40 [2021-11-19 14:33:50,772 INFO L226 Difference]: Without dead ends: 17 [2021-11-19 14:33:50,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:33:50,789 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:50,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:33:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-19 14:33:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-19 14:33:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 14:33:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-19 14:33:50,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2021-11-19 14:33:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:50,843 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-19 14:33:50,843 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) [2021-11-19 14:33:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-19 14:33:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:33:50,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:50,844 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:50,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:51,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:51,063 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2021-11-19 14:33:51,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:51,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234529914] [2021-11-19 14:33:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:51,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:51,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:51,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:51,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:33:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:51,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:33:51,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:51,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:51,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:51,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234529914] [2021-11-19 14:33:51,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234529914] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:51,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:51,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 14:33:51,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521416910] [2021-11-19 14:33:51,400 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:51,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:33:51,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:51,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:33:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:33:51,403 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-19 14:33:53,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:55,814 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:58,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:00,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:03,640 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:05,750 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:08,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:08,143 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2021-11-19 14:34:08,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:34:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 8 [2021-11-19 14:34:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:08,145 INFO L225 Difference]: With dead ends: 43 [2021-11-19 14:34:08,145 INFO L226 Difference]: Without dead ends: 34 [2021-11-19 14:34:08,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:34:08,147 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:08,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 76 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 6 Unknown, 0 Unchecked, 16.7s Time] [2021-11-19 14:34:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-19 14:34:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-19 14:34:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-19 14:34:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2021-11-19 14:34:08,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 8 [2021-11-19 14:34:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:08,173 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2021-11-19 14:34:08,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-19 14:34:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2021-11-19 14:34:08,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:34:08,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:08,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:08,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:08,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:08,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2021-11-19 14:34:08,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:08,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100646751] [2021-11-19 14:34:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:08,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:08,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:08,385 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:08,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:34:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:34:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:08,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:18,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:18,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100646751] [2021-11-19 14:34:18,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100646751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:18,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:18,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 14:34:18,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652798771] [2021-11-19 14:34:18,271 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:18,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:34:18,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:34:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:34:18,273 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:20,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:22,152 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:26,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, RoundingMode, FloatingPoint, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:28,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:30,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:32,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:36,302 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:38,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:39,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:41,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:43,979 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:45,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:49,012 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:51,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:51,292 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-19 14:34:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:34:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 14:34:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:51,414 INFO L225 Difference]: With dead ends: 44 [2021-11-19 14:34:51,414 INFO L226 Difference]: Without dead ends: 42 [2021-11-19 14:34:51,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:34:51,424 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:51,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 29.7s Time] [2021-11-19 14:34:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-19 14:34:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-19 14:34:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-19 14:34:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-19 14:34:51,437 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 8 [2021-11-19 14:34:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:51,438 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-19 14:34:51,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-19 14:34:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 14:34:51,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:51,439 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:51,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:51,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:51,646 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2021-11-19 14:34:51,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:51,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993945340] [2021-11-19 14:34:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:51,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:51,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:51,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:51,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:34:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:34:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:55,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:01,603 WARN L838 $PredicateComparison]: unable to prove that (= (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvneg (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (_ bv6 32)) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from false [2021-11-19 14:35:03,639 WARN L860 $PredicateComparison]: unable to prove that (= (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvneg (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (_ bv6 32)) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from true [2021-11-19 14:35:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:28,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:28,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993945340] [2021-11-19 14:35:28,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993945340] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:35:28,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:35:28,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-11-19 14:35:28,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418315998] [2021-11-19 14:35:28,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:28,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:35:28,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:35:28,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=56, Unknown=2, NotChecked=14, Total=90 [2021-11-19 14:35:28,344 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-19 14:35:31,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:34,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:36,350 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:36,351 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-19 14:35:36,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:35:36,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2021-11-19 14:35:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:36,451 INFO L225 Difference]: With dead ends: 42 [2021-11-19 14:35:36,452 INFO L226 Difference]: Without dead ends: 40 [2021-11-19 14:35:36,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=22, Invalid=70, Unknown=2, NotChecked=16, Total=110 [2021-11-19 14:35:36,453 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:36,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 62 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 3 Unknown, 32 Unchecked, 7.4s Time] [2021-11-19 14:35:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-19 14:35:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-19 14:35:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-19 14:35:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-19 14:35:36,467 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 13 [2021-11-19 14:35:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:36,467 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-19 14:35:36,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-19 14:35:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-19 14:35:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 14:35:36,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:36,469 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:36,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 14:35:36,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:36,692 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash 892115231, now seen corresponding path program 1 times [2021-11-19 14:35:36,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:36,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890257439] [2021-11-19 14:35:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:36,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:36,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:36,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:36,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:35:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:35:37,954 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:35:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:35:39,259 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-19 14:35:39,259 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:35:39,260 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:35:39,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:39,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:39,465 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-11-19 14:35:39,467 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:35:39,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:35:39 BoogieIcfgContainer [2021-11-19 14:35:39,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:35:39,490 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:35:39,490 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:35:39,490 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:35:39,491 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:33:50" (3/4) ... [2021-11-19 14:35:39,492 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 14:35:39,531 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/witness.graphml [2021-11-19 14:35:39,531 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:35:39,532 INFO L158 Benchmark]: Toolchain (without parser) took 112230.66ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 42.5MB in the beginning and 32.5MB in the end (delta: 10.0MB). Peak memory consumption was 29.0MB. Max. memory is 16.1GB. [2021-11-19 14:35:39,532 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 65.0MB. Free memory was 44.9MB in the beginning and 44.8MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:35:39,533 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.19ms. Allocated memory is still 65.0MB. Free memory was 42.4MB in the beginning and 46.4MB in the end (delta: -4.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:35:39,533 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.06ms. Allocated memory is still 65.0MB. Free memory was 46.4MB in the beginning and 44.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:35:39,534 INFO L158 Benchmark]: Boogie Preprocessor took 27.42ms. Allocated memory is still 65.0MB. Free memory was 44.8MB in the beginning and 43.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:35:39,534 INFO L158 Benchmark]: RCFGBuilder took 2484.17ms. Allocated memory is still 65.0MB. Free memory was 43.3MB in the beginning and 33.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:35:39,535 INFO L158 Benchmark]: TraceAbstraction took 109316.97ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 32.9MB in the beginning and 34.6MB in the end (delta: -1.7MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. [2021-11-19 14:35:39,535 INFO L158 Benchmark]: Witness Printer took 41.40ms. Allocated memory is still 83.9MB. Free memory was 34.6MB in the beginning and 32.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:35:39,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 65.0MB. Free memory was 44.9MB in the beginning and 44.8MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 314.19ms. Allocated memory is still 65.0MB. Free memory was 42.4MB in the beginning and 46.4MB in the end (delta: -4.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.06ms. Allocated memory is still 65.0MB. Free memory was 46.4MB in the beginning and 44.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 27.42ms. Allocated memory is still 65.0MB. Free memory was 44.8MB in the beginning and 43.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2484.17ms. Allocated memory is still 65.0MB. Free memory was 43.3MB in the beginning and 33.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 109316.97ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 32.9MB in the beginning and 34.6MB in the end (delta: -1.7MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. * Witness Printer took 41.40ms. Allocated memory is still 83.9MB. Free memory was 34.6MB in the beginning and 32.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=0.10416666666666682, counter=0, r=1, s=3.25, x=0.10416666666666682] [L33] EXPR counter++ VAL [a=0.10416666666666682, counter=1, counter++=0, r=1, s=3.25, x=0.10416666666666682] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=1, counter=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [a=0.10416666666666682, counter=1, r=1, s=3.25, x=0.10416666666666682] [L35] CALL __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [\old(cond)=1, counter=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [a=0.10416666666666682, counter=1, r=1, s=3.25, x=0.10416666666666682] [L36] CALL __VERIFIER_assert((int)(8*r*s - 24*a + 16*r - 12*s + 24*x - 3 == 0)) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 109.2s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 58.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 19 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 53.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 43 mSDsluCounter, 287 SdHoareTripleChecker+Invalid, 52.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 32 IncrementalHoareTripleChecker+Unchecked, 195 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51 IncrementalHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 92 mSDtfsCounter, 51 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 27.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=3, InterpolantAutomatonStates: 23, 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, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 45.7s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 64 ConstructedInterpolants, 1 QuantifiedInterpolants, 383 SizeOfPredicates, 5 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 7 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-19 14:35:39,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2764ac6e-ffae-4a60-aaba-d6a9f6ac7edd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE