./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/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 a1bf08deab21e7c527b53e29ab73d8419b59d4473f6d72f64c5dfeebc180cee2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:09:24,307 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:09:24,424 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:09:24,435 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:09:24,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:09:24,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:09:24,477 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:09:24,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:09:24,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:09:24,484 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:09:24,485 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:09:24,486 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:09:24,486 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:09:24,488 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:09:24,489 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:09:24,489 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:09:24,489 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:09:24,490 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:09:24,490 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:09:24,491 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:09:24,491 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:09:24,492 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:09:24,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:09:24,493 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:09:24,494 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:09:24,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:09:24,495 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:09:24,495 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:09:24,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:09:24,496 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:09:24,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:09:24,498 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:09:24,498 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:09:24,498 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:09:24,498 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:09:24,499 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:09:24,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:09:24,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:24,499 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:09:24,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:09:24,500 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:09:24,504 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:09:24,505 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:09:24,505 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:09:24,506 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:09:24,506 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:09:24,506 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:09:24,506 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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1bf08deab21e7c527b53e29ab73d8419b59d4473f6d72f64c5dfeebc180cee2 [2023-11-23 21:09:24,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:09:24,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:09:24,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:09:24,845 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:09:24,846 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:09:24,847 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i [2023-11-23 21:09:28,055 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:09:28,336 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:09:28,337 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i [2023-11-23 21:09:28,346 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/data/e7ec2ae9d/6bee0a35eee748a0a78d65fb33621a06/FLAGbddcf9024 [2023-11-23 21:09:28,365 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/data/e7ec2ae9d/6bee0a35eee748a0a78d65fb33621a06 [2023-11-23 21:09:28,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:09:28,370 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:09:28,371 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:28,371 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:09:28,377 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:09:28,378 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78421d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28, skipping insertion in model container [2023-11-23 21:09:28,380 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,410 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:09:28,589 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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i[915,928] [2023-11-23 21:09:28,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:28,643 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:09:28,654 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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i[915,928] [2023-11-23 21:09:28,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:28,694 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:09:28,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28 WrapperNode [2023-11-23 21:09:28,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:28,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:28,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:09:28,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:09:28,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,713 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,751 INFO L138 Inliner]: procedures = 26, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 86 [2023-11-23 21:09:28,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:28,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:09:28,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:09:28,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:09:28,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,767 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,769 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,778 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,785 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,804 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:09:28,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:09:28,809 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:09:28,809 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:09:28,810 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (1/1) ... [2023-11-23 21:09:28,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:28,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:28,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:09:28,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:09:28,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:09:28,900 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:09:28,900 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:09:28,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:09:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:09:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:09:29,017 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:09:29,020 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:09:29,377 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:09:29,543 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:09:29,543 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:09:29,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:29 BoogieIcfgContainer [2023-11-23 21:09:29,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:09:29,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:09:29,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:09:29,555 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:09:29,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:28" (1/3) ... [2023-11-23 21:09:29,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ded5174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:29, skipping insertion in model container [2023-11-23 21:09:29,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:28" (2/3) ... [2023-11-23 21:09:29,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ded5174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:29, skipping insertion in model container [2023-11-23 21:09:29,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:29" (3/3) ... [2023-11-23 21:09:29,561 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-73.i [2023-11-23 21:09:29,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:09:29,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:09:29,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:09:29,635 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;@7fda9ad1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:09:29,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:09:29,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 21:09:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:09:29,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:29,651 INFO L195 NwaCegarLoop]: trace histogram [9, 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 21:09:29,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:29,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:29,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1054595333, now seen corresponding path program 1 times [2023-11-23 21:09:29,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:29,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639404232] [2023-11-23 21:09:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:29,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:09:29,962 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:09:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:09:30,125 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:09:30,127 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:09:30,129 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 21:09:30,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:09:30,139 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-23 21:09:30,143 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:09:30,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:09:30 BoogieIcfgContainer [2023-11-23 21:09:30,227 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:09:30,230 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:09:30,231 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:09:30,231 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:09:30,231 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:29" (3/4) ... [2023-11-23 21:09:30,234 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 21:09:30,235 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:09:30,237 INFO L158 Benchmark]: Toolchain (without parser) took 1866.98ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 130.1MB in the beginning and 159.3MB in the end (delta: -29.2MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2023-11-23 21:09:30,237 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:09:30,238 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.66ms. Allocated memory is still 161.5MB. Free memory was 130.1MB in the beginning and 117.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:09:30,239 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.18ms. Allocated memory is still 161.5MB. Free memory was 117.9MB in the beginning and 115.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:09:30,239 INFO L158 Benchmark]: Boogie Preprocessor took 55.18ms. Allocated memory is still 161.5MB. Free memory was 115.5MB in the beginning and 114.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:09:30,240 INFO L158 Benchmark]: RCFGBuilder took 737.28ms. Allocated memory is still 161.5MB. Free memory was 114.2MB in the beginning and 90.6MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-23 21:09:30,241 INFO L158 Benchmark]: TraceAbstraction took 679.12ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 89.7MB in the beginning and 159.3MB in the end (delta: -69.6MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. [2023-11-23 21:09:30,242 INFO L158 Benchmark]: Witness Printer took 5.24ms. Allocated memory is still 195.0MB. Free memory is still 159.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:09:30,245 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.66ms. Allocated memory is still 161.5MB. Free memory was 130.1MB in the beginning and 117.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.18ms. Allocated memory is still 161.5MB. Free memory was 117.9MB in the beginning and 115.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.18ms. Allocated memory is still 161.5MB. Free memory was 115.5MB in the beginning and 114.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 737.28ms. Allocated memory is still 161.5MB. Free memory was 114.2MB in the beginning and 90.6MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 679.12ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 89.7MB in the beginning and 159.3MB in the end (delta: -69.6MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. * Witness Printer took 5.24ms. Allocated memory is still 195.0MB. Free memory is still 159.3MB. 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 a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 48, overapproximation of someUnaryDOUBLEoperation at line 24. Possible FailurePath: [L21] unsigned char isInitial = 0; [L22] double var_1_1 = 5.5; [L23] unsigned char var_1_6 = 1; [L24] double var_1_7 = -0.41; [L25] unsigned char var_1_8 = 25; [L26] unsigned char var_1_9 = 100; [L27] unsigned char var_1_10 = 1; [L28] unsigned char var_1_12 = 10; [L29] signed short int var_1_13 = -64; [L30] signed long int var_1_14 = 10; [L31] signed short int var_1_15 = -1; [L32] unsigned char last_1_var_1_8 = 25; [L33] signed long int last_1_var_1_14 = 10; [L85] isInitial = 1 [L86] FCALL initially() [L87] COND TRUE 1 [L88] CALL updateLastVariables() [L77] last_1_var_1_8 = var_1_8 [L78] last_1_var_1_14 = var_1_14 [L88] RET updateLastVariables() [L89] CALL updateVariables() [L61] var_1_6 = __VERIFIER_nondet_uchar() [L62] CALL assume_abort_if_not(var_1_6 >= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_8=25, var_1_9=100] [L20] COND FALSE !(!cond) [L62] RET assume_abort_if_not(var_1_6 >= 0) VAL [isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_8=25, var_1_9=100] [L63] CALL assume_abort_if_not(var_1_6 <= 1) VAL [\old(cond)=1, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=100] [L20] COND FALSE !(!cond) [L63] RET assume_abort_if_not(var_1_6 <= 1) VAL [isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=100] [L64] var_1_7 = __VERIFIER_nondet_double() [L65] CALL assume_abort_if_not((var_1_7 >= -922337.2036854765600e+13F && var_1_7 <= -1.0e-20F) || (var_1_7 <= 9223372.036854765600e+12F && var_1_7 >= 1.0e-20F )) VAL [\old(cond)=1, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=100] [L20] COND FALSE !(!cond) [L65] RET assume_abort_if_not((var_1_7 >= -922337.2036854765600e+13F && var_1_7 <= -1.0e-20F) || (var_1_7 <= 9223372.036854765600e+12F && var_1_7 >= 1.0e-20F )) VAL [isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=100] [L66] var_1_9 = __VERIFIER_nondet_uchar() [L67] CALL assume_abort_if_not(var_1_9 >= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25] [L20] COND FALSE !(!cond) [L67] RET assume_abort_if_not(var_1_9 >= 0) VAL [isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25] [L68] CALL assume_abort_if_not(var_1_9 <= 254) VAL [\old(cond)=1, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L20] COND FALSE !(!cond) [L68] RET assume_abort_if_not(var_1_9 <= 254) VAL [isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=1, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L69] var_1_10 = __VERIFIER_nondet_uchar() [L70] CALL assume_abort_if_not(var_1_10 >= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L20] COND FALSE !(!cond) [L70] RET assume_abort_if_not(var_1_10 >= 0) VAL [isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L71] CALL assume_abort_if_not(var_1_10 <= 254) VAL [\old(cond)=1, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=0, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L20] COND FALSE !(!cond) [L71] RET assume_abort_if_not(var_1_10 <= 254) VAL [isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=0, var_1_12=10, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L72] var_1_12 = __VERIFIER_nondet_uchar() [L73] CALL assume_abort_if_not(var_1_12 >= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=0, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L20] COND FALSE !(!cond) [L73] RET assume_abort_if_not(var_1_12 >= 0) VAL [isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=0, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L74] CALL assume_abort_if_not(var_1_12 <= 254) VAL [\old(cond)=1, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=0, var_1_12=254, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L20] COND FALSE !(!cond) [L74] RET assume_abort_if_not(var_1_12 <= 254) VAL [isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=0, var_1_12=254, var_1_13=-64, var_1_14=10, var_1_15=-1, var_1_1=11/2, var_1_6=0, var_1_8=25, var_1_9=0] [L89] RET updateVariables() [L90] CALL step() [L37] signed long int stepLocal_0 = (((last_1_var_1_8) > ((last_1_var_1_14 + last_1_var_1_14))) ? (last_1_var_1_8) : ((last_1_var_1_14 + last_1_var_1_14))); [L38] COND TRUE last_1_var_1_14 <= stepLocal_0 [L39] COND TRUE ! var_1_6 [L40] var_1_1 = var_1_7 [L45] COND FALSE !(\read(var_1_6)) [L48] COND FALSE !(var_1_1 < (var_1_1 + var_1_7)) [L52] COND FALSE !((9.99999999999995E13f + var_1_1) >= var_1_1) [L55] var_1_13 = (((((var_1_9) < (8)) ? (var_1_9) : (8))) - 32) [L57] var_1_15 = var_1_12 [L58] var_1_14 = var_1_15 [L90] RET step() [L91] CALL, EXPR property() [L81-L82] return (((((last_1_var_1_14 <= ((((last_1_var_1_8) > ((last_1_var_1_14 + last_1_var_1_14))) ? (last_1_var_1_8) : ((last_1_var_1_14 + last_1_var_1_14))))) ? ((! var_1_6) ? (var_1_1 == ((double) var_1_7)) : (var_1_1 == ((double) var_1_7))) : 1) && (var_1_6 ? (var_1_8 == ((unsigned char) ((((var_1_9) > (var_1_10)) ? (var_1_9) : (var_1_10))))) : ((var_1_1 < (var_1_1 + var_1_7)) ? (var_1_8 == ((unsigned char) var_1_12)) : 1))) && (((9.99999999999995E13f + var_1_1) >= var_1_1) ? (var_1_13 == ((signed short int) (-4 + var_1_10))) : (var_1_13 == ((signed short int) (((((var_1_9) < (8)) ? (var_1_9) : (8))) - 32))))) && (var_1_14 == ((signed long int) var_1_15))) && (var_1_15 == ((signed short int) var_1_12)) ; [L91] RET, EXPR property() [L91] CALL __VERIFIER_assert(property()) [L19] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=0, var_1_12=254, var_1_13=-32, var_1_14=254, var_1_15=254, var_1_1=11/2, var_1_6=0, var_1_7=11/2, var_1_8=25, var_1_9=0] [L19] reach_error() VAL [\old(cond)=0, cond=0, isInitial=1, last_1_var_1_14=10, last_1_var_1_8=25, var_1_10=0, var_1_12=254, var_1_13=-32, var_1_14=254, var_1_15=254, var_1_1=11/2, var_1_6=0, var_1_7=11/2, var_1_8=25, var_1_9=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 9, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 [2023-11-23 21:09:30,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/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 a1bf08deab21e7c527b53e29ab73d8419b59d4473f6d72f64c5dfeebc180cee2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:09:33,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:09:33,361 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-23 21:09:33,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:09:33,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:09:33,399 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:09:33,400 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:09:33,401 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:09:33,402 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:09:33,402 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:09:33,403 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:09:33,404 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:09:33,404 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:09:33,405 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:09:33,406 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:09:33,406 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:09:33,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:09:33,408 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:09:33,408 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:09:33,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:09:33,410 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:09:33,410 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:09:33,411 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:09:33,411 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:09:33,412 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:09:33,412 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:09:33,413 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:09:33,413 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:09:33,414 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:09:33,414 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:09:33,415 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:09:33,415 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:09:33,416 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:09:33,416 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:09:33,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:33,418 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:09:33,418 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:09:33,419 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:09:33,419 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:09:33,419 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:09:33,420 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:09:33,420 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:09:33,421 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:09:33,421 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:09:33,421 INFO L153 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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1bf08deab21e7c527b53e29ab73d8419b59d4473f6d72f64c5dfeebc180cee2 [2023-11-23 21:09:33,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:09:33,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:09:33,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:09:33,862 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:09:33,863 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:09:33,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i [2023-11-23 21:09:37,231 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:09:37,597 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:09:37,598 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i [2023-11-23 21:09:37,607 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/data/d5864592a/b1bb6eac854d48379106a0a375333a6f/FLAG4053240c0 [2023-11-23 21:09:37,624 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/data/d5864592a/b1bb6eac854d48379106a0a375333a6f [2023-11-23 21:09:37,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:09:37,629 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:09:37,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:37,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:09:37,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:09:37,637 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:37" (1/1) ... [2023-11-23 21:09:37,639 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7801c303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:37, skipping insertion in model container [2023-11-23 21:09:37,639 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:37" (1/1) ... [2023-11-23 21:09:37,682 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:09:37,842 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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i[915,928] [2023-11-23 21:09:37,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:37,916 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:09:37,938 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_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-73.i[915,928] [2023-11-23 21:09:37,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:38,012 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:09:38,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38 WrapperNode [2023-11-23 21:09:38,013 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:38,015 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:38,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:09:38,015 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:09:38,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,097 INFO L138 Inliner]: procedures = 27, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 86 [2023-11-23 21:09:38,100 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:38,101 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:09:38,101 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:09:38,101 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:09:38,111 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,124 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,124 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,163 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,174 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:09:38,176 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:09:38,176 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:09:38,176 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:09:38,182 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (1/1) ... [2023-11-23 21:09:38,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:38,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:38,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:09:38,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:09:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:09:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:09:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:09:38,271 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:09:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:09:38,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:09:38,398 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:09:38,402 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:09:40,367 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:09:40,437 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:09:40,438 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:09:40,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:40 BoogieIcfgContainer [2023-11-23 21:09:40,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:09:40,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:09:40,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:09:40,445 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:09:40,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:37" (1/3) ... [2023-11-23 21:09:40,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6074e683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:40, skipping insertion in model container [2023-11-23 21:09:40,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:38" (2/3) ... [2023-11-23 21:09:40,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6074e683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:40, skipping insertion in model container [2023-11-23 21:09:40,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:40" (3/3) ... [2023-11-23 21:09:40,449 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-73.i [2023-11-23 21:09:40,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:09:40,472 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:09:40,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:09:40,545 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;@5ac75ea4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:09:40,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:09:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 21:09:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:09:40,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:40,570 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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 21:09:40,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:40,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1008975170, now seen corresponding path program 1 times [2023-11-23 21:09:40,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:09:40,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996537534] [2023-11-23 21:09:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:40,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:09:40,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:09:40,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:09:40,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-23 21:09:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:40,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:09:40,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-11-23 21:09:41,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:41,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:09:41,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996537534] [2023-11-23 21:09:41,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996537534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:41,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:41,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:41,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669366373] [2023-11-23 21:09:41,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:41,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:09:41,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:09:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:09:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:09:41,068 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:09:41,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:41,899 INFO L93 Difference]: Finished difference Result 61 states and 103 transitions. [2023-11-23 21:09:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:09:41,918 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 58 [2023-11-23 21:09:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:41,925 INFO L225 Difference]: With dead ends: 61 [2023-11-23 21:09:41,925 INFO L226 Difference]: Without dead ends: 30 [2023-11-23 21:09:41,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:09:41,934 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:41,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:09:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-23 21:09:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-23 21:09:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 21:09:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2023-11-23 21:09:41,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 58 [2023-11-23 21:09:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:41,980 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2023-11-23 21:09:41,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:09:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2023-11-23 21:09:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:09:41,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:41,985 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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 21:09:41,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-23 21:09:42,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:09:42,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:42,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1299726272, now seen corresponding path program 1 times [2023-11-23 21:09:42,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:09:42,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970507454] [2023-11-23 21:09:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:42,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:09:42,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:09:42,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:09:42,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-23 21:09:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:42,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:09:42,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-23 21:09:43,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:43,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:09:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970507454] [2023-11-23 21:09:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970507454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:43,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:09:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444556891] [2023-11-23 21:09:43,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:43,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:43,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:09:43,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:43,494 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:09:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:45,702 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2023-11-23 21:09:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:09:45,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 58 [2023-11-23 21:09:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:45,719 INFO L225 Difference]: With dead ends: 91 [2023-11-23 21:09:45,719 INFO L226 Difference]: Without dead ends: 62 [2023-11-23 21:09:45,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:09:45,722 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:45,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 134 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 21:09:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-23 21:09:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2023-11-23 21:09:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-23 21:09:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 71 transitions. [2023-11-23 21:09:45,762 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 71 transitions. Word has length 58 [2023-11-23 21:09:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:45,763 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 71 transitions. [2023-11-23 21:09:45,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:09:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 71 transitions. [2023-11-23 21:09:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 21:09:45,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:45,766 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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 21:09:45,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:45,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:09:45,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:45,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:45,974 INFO L85 PathProgramCache]: Analyzing trace with hash -416378588, now seen corresponding path program 1 times [2023-11-23 21:09:45,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:09:45,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751729624] [2023-11-23 21:09:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:45,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:09:45,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:09:45,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:09:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-23 21:09:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:46,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:09:46,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-23 21:09:46,254 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:46,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:09:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751729624] [2023-11-23 21:09:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751729624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:46,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:46,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:09:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486282261] [2023-11-23 21:09:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:46,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:09:46,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:09:46,257 INFO L87 Difference]: Start difference. First operand 50 states and 71 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:09:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:47,274 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2023-11-23 21:09:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:47,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 59 [2023-11-23 21:09:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:47,279 INFO L225 Difference]: With dead ends: 87 [2023-11-23 21:09:47,282 INFO L226 Difference]: Without dead ends: 58 [2023-11-23 21:09:47,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:09:47,286 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:47,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 77 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:09:47,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-23 21:09:47,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2023-11-23 21:09:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-23 21:09:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2023-11-23 21:09:47,317 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 59 [2023-11-23 21:09:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:47,318 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2023-11-23 21:09:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:09:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2023-11-23 21:09:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 21:09:47,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:47,321 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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 21:09:47,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:47,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:09:47,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:47,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:47,530 INFO L85 PathProgramCache]: Analyzing trace with hash -359120286, now seen corresponding path program 1 times [2023-11-23 21:09:47,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:09:47,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840535982] [2023-11-23 21:09:47,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:47,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:09:47,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:09:47,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:09:47,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fb29de7-3df6-43f4-bd1b-e0c86bf2d85a/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-23 21:09:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:47,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:09:47,798 INFO L285 TraceCheckSpWp]: Computing forward predicates...