./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh --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 2523ced2438443f67ce3f9b2a31659324ab8c393814038e5cf118fc2fe7fb5b1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:32:35,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:32:35,221 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:32:35,226 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:32:35,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:32:35,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:32:35,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:32:35,251 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:32:35,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:32:35,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:32:35,253 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:32:35,253 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:32:35,254 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:32:35,254 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:32:35,255 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:32:35,255 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:32:35,256 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:32:35,256 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:32:35,257 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:32:35,257 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:32:35,258 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:32:35,258 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:32:35,259 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:32:35,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:32:35,260 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:32:35,260 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:32:35,261 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:32:35,261 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:32:35,262 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:32:35,262 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:32:35,262 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:32:35,263 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:32:35,263 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:32:35,264 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:32:35,264 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:32:35,264 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:32:35,265 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:32:35,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:32:35,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:32:35,265 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:32:35,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:32:35,266 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:32:35,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:32:35,266 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:32:35,267 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:32:35,267 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:32:35,267 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:32:35,267 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_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2523ced2438443f67ce3f9b2a31659324ab8c393814038e5cf118fc2fe7fb5b1 [2023-12-02 19:32:35,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:32:35,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:32:35,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:32:35,517 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:32:35,517 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:32:35,518 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-6.i [2023-12-02 19:32:38,253 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:32:38,429 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:32:38,429 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-6.i [2023-12-02 19:32:38,437 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/data/92512e3e3/6f6ae12175b74362a12ca036c51b074c/FLAG327fd6e43 [2023-12-02 19:32:38,449 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/data/92512e3e3/6f6ae12175b74362a12ca036c51b074c [2023-12-02 19:32:38,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:32:38,452 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:32:38,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:32:38,454 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:32:38,459 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:32:38,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1128653e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38, skipping insertion in model container [2023-12-02 19:32:38,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,486 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:32:38,625 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_9c915133-29a4-4cde-91ea-138af6e737a3/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-6.i[914,927] [2023-12-02 19:32:38,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:32:38,675 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:32:38,686 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_9c915133-29a4-4cde-91ea-138af6e737a3/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-6.i[914,927] [2023-12-02 19:32:38,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:32:38,725 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:32:38,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38 WrapperNode [2023-12-02 19:32:38,726 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:32:38,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:32:38,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:32:38,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:32:38,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,740 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,764 INFO L138 Inliner]: procedures = 26, calls = 32, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 119 [2023-12-02 19:32:38,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:32:38,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:32:38,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:32:38,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:32:38,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,774 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,774 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,780 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,784 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,786 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,788 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,791 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:32:38,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:32:38,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:32:38,793 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:32:38,793 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (1/1) ... [2023-12-02 19:32:38,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:32:38,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:32:38,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:32:38,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:32:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:32:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 19:32:38,860 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 19:32:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:32:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:32:38,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:32:38,932 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:32:38,933 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:32:39,209 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:32:39,334 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:32:39,334 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 19:32:39,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:32:39 BoogieIcfgContainer [2023-12-02 19:32:39,336 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:32:39,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:32:39,339 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:32:39,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:32:39,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:32:38" (1/3) ... [2023-12-02 19:32:39,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f08b142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:32:39, skipping insertion in model container [2023-12-02 19:32:39,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:38" (2/3) ... [2023-12-02 19:32:39,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f08b142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:32:39, skipping insertion in model container [2023-12-02 19:32:39,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:32:39" (3/3) ... [2023-12-02 19:32:39,345 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-6.i [2023-12-02 19:32:39,364 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:32:39,364 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:32:39,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:32:39,411 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;@34b3d9d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:32:39,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:32:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 19 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 19:32:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 19:32:39,423 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:32:39,424 INFO L195 NwaCegarLoop]: trace histogram [19, 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:32:39,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:32:39,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:32:39,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1496499275, now seen corresponding path program 1 times [2023-12-02 19:32:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:32:39,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361121234] [2023-12-02 19:32:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:39,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:32:39,574 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:32:39,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012745283] [2023-12-02 19:32:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:39,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:32:39,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:32:39,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:32:39,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c915133-29a4-4cde-91ea-138af6e737a3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:32:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:39,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 19:32:39,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:38:07,327 WARN L293 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 507 DAG size of output: 724 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 19:38:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 65 proven. 33 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2023-12-02 19:38:42,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:44:50,373 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (mod c_~var_1_4~0 65536)) (.cse11 (mod c_~last_1_var_1_1~0 4294967296)) (.cse0 (mod c_~last_1_var_1_6~0 65536)) (.cse9 (mod c_~var_1_6~0 65536))) (let ((.cse8 (* .cse9 .cse9)) (.cse5 (< .cse11 (+ .cse0 1))) (.cse4 (mod (div .cse11 .cse7) 4294967296)) (.cse1 (< .cse0 .cse11)) (.cse6 (mod c_~last_1_var_1_18~0 4294967296)) (.cse2 (mod (div .cse0 .cse7) 4294967296))) (and (or (= c_~last_1_var_1_18~0 .cse0) (let ((.cse3 (+ .cse6 1))) (and (or .cse1 (< .cse2 .cse3)) (or (< .cse4 .cse3) .cse5))) (not (= (mod (+ .cse7 4294967168) 4294967296) 128)) (and (forall ((~var_1_7~0 Int)) (< 128 (mod (+ .cse8 (* .cse9 ~var_1_7~0)) 4294967296))) (forall ((~var_1_7~0 Int)) (< (mod (+ .cse8 (* .cse9 ~var_1_7~0)) 4294967296) 129)))) (let ((.cse10 (mod c_~var_1_1~0 4294967296))) (or (and (forall ((~var_1_7~0 Int)) (< .cse10 (mod (+ .cse8 (* .cse9 ~var_1_7~0)) 4294967296))) (forall ((~var_1_7~0 Int)) (< (mod (+ .cse8 (* .cse9 ~var_1_7~0)) 4294967296) (+ .cse10 1)))) (and (or .cse5 (< .cse6 .cse4)) (or .cse1 (< .cse6 .cse2))) (not (= (mod (+ .cse7 (* c_~var_1_1~0 4294967295)) 4294967296) .cse10))))))) is different from false [2023-12-02 19:44:59,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:44:59,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361121234] [2023-12-02 19:44:59,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:44:59,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012745283] [2023-12-02 19:44:59,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012745283] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:44:59,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189968416] [2023-12-02 19:44:59,503 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-12-02 19:44:59,503 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:44:59,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:44:59,510 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:44:59,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs