./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-69.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-69.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 eb38a6277789313b4c0c250f5b5f1ba7c2b250b2041c8bed6de57b5504d1e25c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:20:08,645 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:20:08,781 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:20:08,794 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:20:08,795 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:20:08,839 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:20:08,840 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:20:08,840 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:20:08,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:20:08,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:20:08,848 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:20:08,848 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:20:08,849 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:20:08,851 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:20:08,851 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:20:08,852 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:20:08,852 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:20:08,853 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:20:08,853 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:20:08,854 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:20:08,854 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:20:08,855 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:20:08,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:20:08,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:20:08,857 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:20:08,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:20:08,858 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:20:08,859 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:20:08,859 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:20:08,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:20:08,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:20:08,862 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:20:08,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:20:08,862 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:20:08,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:20:08,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:20:08,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:20:08,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:20:08,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:20:08,864 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:20:08,864 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:20:08,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:20:08,865 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:20:08,865 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:20:08,866 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:20:08,866 INFO L153 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_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb38a6277789313b4c0c250f5b5f1ba7c2b250b2041c8bed6de57b5504d1e25c [2023-11-19 04:20:09,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:20:09,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:20:09,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:20:09,265 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:20:09,266 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:20:09,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-69.i [2023-11-19 04:20:12,635 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:20:12,912 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:20:12,914 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-69.i [2023-11-19 04:20:12,925 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/data/b4a0e2f31/811ef6eb65d440a6ba313bcca833cfa2/FLAGbf4c75a2b [2023-11-19 04:20:12,941 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/data/b4a0e2f31/811ef6eb65d440a6ba313bcca833cfa2 [2023-11-19 04:20:12,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:20:12,950 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:20:12,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:20:12,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:20:12,961 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:20:12,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:20:12" (1/1) ... [2023-11-19 04:20:12,963 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@93e6e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:12, skipping insertion in model container [2023-11-19 04:20:12,963 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:20:12" (1/1) ... [2023-11-19 04:20:13,007 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:20:13,197 WARN L240 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_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-69.i[915,928] [2023-11-19 04:20:13,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:20:13,252 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:20:13,265 WARN L240 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_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-69.i[915,928] [2023-11-19 04:20:13,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:20:13,324 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:20:13,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13 WrapperNode [2023-11-19 04:20:13,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:20:13,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:20:13,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:20:13,327 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:20:13,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,392 INFO L138 Inliner]: procedures = 26, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 139 [2023-11-19 04:20:13,392 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:20:13,393 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:20:13,393 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:20:13,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:20:13,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,419 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,427 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:20:13,428 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:20:13,429 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:20:13,429 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:20:13,430 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (1/1) ... [2023-11-19 04:20:13,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:20:13,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:13,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:20:13,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:20:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:20:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:20:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:20:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:20:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:20:13,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:20:13,642 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:20:13,648 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:20:14,007 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:20:14,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:20:14,308 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:20:14,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:20:14 BoogieIcfgContainer [2023-11-19 04:20:14,313 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:20:14,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:20:14,315 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:20:14,318 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:20:14,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:20:12" (1/3) ... [2023-11-19 04:20:14,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f5b447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:20:14, skipping insertion in model container [2023-11-19 04:20:14,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:13" (2/3) ... [2023-11-19 04:20:14,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f5b447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:20:14, skipping insertion in model container [2023-11-19 04:20:14,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:20:14" (3/3) ... [2023-11-19 04:20:14,321 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-1loop_file-69.i [2023-11-19 04:20:14,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:20:14,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:20:14,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:20:14,406 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2d0735ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:20:14,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:20:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 04:20:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 04:20:14,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:14,421 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:20:14,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:20:14,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1931769923, now seen corresponding path program 1 times [2023-11-19 04:20:14,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:14,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527169578] [2023-11-19 04:20:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:14,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:14,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:20:14,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304844177] [2023-11-19 04:20:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:14,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:14,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:14,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:14,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36fe8e9b-f1b0-46c3-a12f-9e1749df48af/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:20:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:14,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-19 04:20:14,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 179 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-19 04:20:20,922 INFO L327 TraceCheckSpWp]: Computing backward predicates...