./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-45.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-45.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire --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 ab7276400434fe8a232724607121d8f2a07be7c40c86efec2b8b1c3c3ad39f5d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:38:09,985 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:38:10,091 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:38:10,103 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:38:10,104 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:38:10,167 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:38:10,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:38:10,171 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:38:10,172 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:38:10,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:38:10,177 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:38:10,179 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:38:10,179 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:38:10,181 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:38:10,181 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:38:10,182 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:38:10,182 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:38:10,183 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:38:10,183 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:38:10,184 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:38:10,184 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:38:10,185 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:38:10,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:38:10,187 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:38:10,187 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:38:10,187 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:38:10,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:38:10,188 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:38:10,189 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:38:10,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:38:10,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:38:10,191 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:38:10,191 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:38:10,192 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:38:10,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:38:10,192 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:38:10,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:38:10,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:10,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:38:10,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:38:10,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:38:10,194 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:38:10,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:38:10,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:38:10,195 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:38:10,196 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:38:10,196 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:38:10,196 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_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab7276400434fe8a232724607121d8f2a07be7c40c86efec2b8b1c3c3ad39f5d [2023-11-23 20:38:10,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:38:10,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:38:10,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:38:10,586 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:38:10,586 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:38:10,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-45.i [2023-11-23 20:38:13,693 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:38:14,020 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:38:14,021 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-45.i [2023-11-23 20:38:14,032 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/data/75c0766d8/40576841eaa14254a0d4a9acc8cd1b07/FLAG5d4a784ce [2023-11-23 20:38:14,052 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/data/75c0766d8/40576841eaa14254a0d4a9acc8cd1b07 [2023-11-23 20:38:14,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:38:14,065 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:38:14,073 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:14,073 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:38:14,082 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:38:14,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eded918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14, skipping insertion in model container [2023-11-23 20:38:14,084 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,117 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:38:14,297 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_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-45.i[915,928] [2023-11-23 20:38:14,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:14,375 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:38:14,388 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_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-45.i[915,928] [2023-11-23 20:38:14,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:14,439 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:38:14,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14 WrapperNode [2023-11-23 20:38:14,440 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:14,441 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:14,442 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:38:14,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:38:14,450 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,463 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,520 INFO L138 Inliner]: procedures = 26, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2023-11-23 20:38:14,521 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:14,522 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:38:14,522 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:38:14,522 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:38:14,533 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,537 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,547 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,551 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,554 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,557 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,562 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:38:14,563 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:38:14,563 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:38:14,564 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:38:14,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:14,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:14,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:38:14,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:38:14,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:38:14,680 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:38:14,680 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:38:14,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:38:14,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:38:14,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:38:14,819 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:38:14,825 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:38:15,140 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:38:15,464 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:38:15,464 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:38:15,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:15 BoogieIcfgContainer [2023-11-23 20:38:15,467 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:38:15,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:38:15,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:38:15,475 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:38:15,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:14" (1/3) ... [2023-11-23 20:38:15,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e349a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:15, skipping insertion in model container [2023-11-23 20:38:15,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14" (2/3) ... [2023-11-23 20:38:15,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e349a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:15, skipping insertion in model container [2023-11-23 20:38:15,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:15" (3/3) ... [2023-11-23 20:38:15,481 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_50-while_file-45.i [2023-11-23 20:38:15,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:38:15,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:38:15,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:38:15,559 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;@be42a1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:38:15,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:38:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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) [2023-11-23 20:38:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-23 20:38:15,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:15,579 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] [2023-11-23 20:38:15,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:15,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:15,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1948202031, now seen corresponding path program 1 times [2023-11-23 20:38:15,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:15,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664918836] [2023-11-23 20:38:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:15,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:15,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:38:15,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941534765] [2023-11-23 20:38:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:15,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:15,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:15,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7d50b3-09f8-4dd1-a9c9-2b0f0bd52820/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:38:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:16,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-23 20:38:16,144 INFO L285 TraceCheckSpWp]: Computing forward predicates...